CN203272588U - Active electromagnetic control system for vibration of plate-girder structure - Google Patents
Active electromagnetic control system for vibration of plate-girder structure Download PDFInfo
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- CN203272588U CN203272588U CN 201320249152 CN201320249152U CN203272588U CN 203272588 U CN203272588 U CN 203272588U CN 201320249152 CN201320249152 CN 201320249152 CN 201320249152 U CN201320249152 U CN 201320249152U CN 203272588 U CN203272588 U CN 203272588U
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 102
- 230000005291 magnetic effect Effects 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims description 51
- 238000013016 damping Methods 0.000 claims description 41
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 28
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 238000004804 winding Methods 0.000 claims description 9
- 229920000459 Nitrile rubber Polymers 0.000 claims description 4
- 229920005549 butyl rubber Polymers 0.000 claims description 4
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 4
- 229920002379 silicone rubber Polymers 0.000 claims description 4
- 239000004945 silicone rubber Substances 0.000 claims description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
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- 238000005259 measurement Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004630 mental health Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
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Abstract
The utility model discloses an initiative electromagnetic control system of plate girder structure vibration, including mechanical part and control part, wall, plate girder structure, the electro-magnet that mechanical part includes that non-ferromagnetic substance makes, the one end and the wall connection of plate girder structure are equipped with displacement sensor on the plate girder structure, the electro-magnet includes electro-magnet A, electro-magnet B, electro-magnet C, electro-magnet D, control part includes computer, power amplifier, does not take the full wave rectifier circuit of wave filter, the computer is connected with displacement sensor, and the power amplifier input is connected with the computer, and wherein all the way of power amplifier output is connected with electro-magnet A, electro-magnet D through the bridge rectifier circuit who does not take the wave filter, and another way is direct to be connected with electro-magnet B, electro-magnet C. When the plate-girder structure vibrates, the magnetic pole polarity and the magnetic field intensity of the electromagnet can be changed spontaneously, so that the vibration is attenuated quickly, and the damage of a mechanical system caused by the vibration is reduced.
Description
Technical field
The utility model relates to mechanical vibration and noise control technique field, relates in particular to a kind of active electromagnetic control system of slab and girder vibration.
Background technique
When any one mechanical system is subject to dynamic exciting or interference, the capital produces response, show as vibration and the noise of structure, this not only can reduce the performance of mechanical system, and the meeting harm humans is healthy, along with the development in the fields such as Aero-Space, precision optical machinery, nanometer technique, the inhibition of structural vibration is become an important subject of various systems.Yet in prior art, great majority are to adopt the method for additional damping and piezo-electric intelligent structure to control, and it has the following disadvantages:
1) because the operating load of equipment, operating conditions etc. often change, the vibration severe degree that causes is also changing, in case and common additional damping structure fabrication and installation are good, the size of its damping constant is just immutable, when mechanical system running environment changes, when particularly resonating, itself do not possess the ability that increases damping.
2) to piezo-electric intelligent structure, big or small limited due to existing piezoelectric actuator to the vibrational structure active force tends to impact and controls effect.
The utility model adopts pole polarity and the magnitude of field intensity of electromagnet to change the vibration that comes the control panel beam structure, the control of the larger slab and girder vibration of suitable rigidity.
Summary of the invention
The utility model is exactly the deficiency that exists in order to solve prior art, and a kind of active electromagnetic control system of slab and girder vibration is provided; Comprise the active electromagnetic control system of not being with the damping material layer and with the active electromagnetic damping control system of damping material layer, realization is controlled the vibration of slab and girder, the damage that causes because of vibration to reduce mechanical system, the precision of maintenance equipment and functional reliability, in the working life of extension device, suppress structure to the noise pollution of environment generation, assurance operator's physical and mental health.
To achieve these goals, the utility model adopts following technological scheme:
a kind of active electromagnetic control system of slab and girder vibration, described system comprises mechanical part and control section, described mechanical part comprises the wall that the nonferromagnetic material is made, slab and girder, electromagnet, one end of described slab and girder is connected with the wall that the nonferromagnetic material is made, slab and girder is provided with displacement transducer, described electromagnet comprises electromagnet A, electromagnet B, electromagnet C, electromagnet D, electromagnet A wherein, electromagnet C is located in the wall that the nonferromagnetic material makes, described electromagnet B, electromagnet D is located at the both sides of slab and girder, described electromagnet A, electromagnet B, the coil winding direction of electromagnet D is identical, electromagnet C coil winding direction and electromagnet A, electromagnet B, electromagnet D winding direction is opposite, electromagnet A and electromagnet D are serially connected by wire, electromagnet B and electromagnet C are serially connected by wire, the centerline collineation of described electromagnet A and electromagnet B, the centerline collineation of electromagnet C and electromagnet D, described control section comprises computer, power amplifier, rectification circuit, described computer is connected with displacement transducer, the power amplifier input end is connected with computer, wherein one tunnel being connected with electromagnet A, electromagnet D through the bridge rectifier of band filter not of power amplifier output terminal, another road directly is connected with electromagnet B, electromagnet C.Power amplifier will be amplified to from the control signal of computer the multiple of setting, make the active force that produces between electromagnet enough large to overcome the vibration of plate-girder, described drive circuit is divided into two-way at the power amplifier output terminal, one the tunnel is connected with electromagnet A, D through the bridge rectifier of band filter not, and another road directly is connected with electromagnet B, C.
Described electromagnet A, electromagnet C are take the central plane of slab and girder 4 as symmetry plane, be located in the wall that the nonferromagnetic material makes symmetrically, described electromagnet B, electromagnet D are located at the both sides of slab and girder symmetrically, the centerline collineation of described electromagnet A and electromagnet B, the centerline collineation of electromagnet C and electromagnet D.
Both sides up and down at the vibration plate-girder are provided with the damping material layer, and described damping material layer outside is provided with restraint layer, and described electromagnet B, electromagnet D be located at the restraint layer outside, and near an end of wall.
Displacement transducer is located at slab and girder upside or downside, and displacement transducer is located at an end of making wall away from the nonferromagnetic material.When slab and girder be bent downwardly the displacement that detects of displacement transducer of when vibration on the occasion of; The displacement that displacement transducer detects when slab and girder is bent upwards vibration is negative value.Displacement transducer is connected with the control system computer by signaling line, computer is connected with electromagnet by power amplifier, its intermediate power amplifier output terminal is divided into two-way, leading up to not, the full-wave bridge rectifier circuit of band filter is connected with electromagnet D with electromagnet A, even power amplifier output current direction changes like this, current direction by electromagnet A and electromagnet D is constant, and namely pole polarity is always constant, but its magnetic intensity can be controlled by adjusting size of current; Another road directly is connected with electromagnet C with electromagnet B, and the pole polarity of B and C and magnitude of field intensity can be controlled like this.
Described indirectly control structural damping material can adopt any one of butyl rubber, neoprene, nitrile butadiene rubber, and hot environment can be used silicone rubber.
Described electromagnet adopts the solenoid electromagnet, and insertion solenoid inside unshakable in one's determination is also fixed with it.Unshakable in one's determination adopt demagnetization soft iron or silicon steel material are made faster, these materials can be in demagnetization immediately after electromagnet outage, when coil alives, coil inside produces magnetic field and makes the soft iron rod magnetization, the magnetic field that iron staff produces and coil magnetic field stack strengthen solenoidal magnetic field greatly, but after failure of current, the magnetic of coil and soft iron rod just disappears.In the utility model, directly two blocks of electromagnet of control structure directly are installed on slab and girder, the indirectly control structure increases damping material layer and constraint material layer between electromagnet and slab and girder, and all the other two blocks of electromagnet are installed on respectively on the wall vertical with slab and girder, and with slab and girder on the electromagnet aligned in position.All electromagnet will be connected on power amplifier by wire, electromagnetic control system sends control signal, through power amplifier, to electromagnet coil power, control sense of current and size by the adjustment of computer pid control algorithm, control pole polarity and the magnitude of field intensity of electromagnet, and then change the active force between slab and girder electromagnet and wall electromagnet, weaken the vibration of slab and girder.
Rectification circuit adopts the not full-wave bridge rectifier circuit of band filter, comprises that the diode of four docking in twos forms.The bridge rectifier left end connects a road in the power amplifier output terminal, right-hand member meets electromagnet A and electromagnet D, when slab and girder is bent downwardly vibration, displacement is for just on the occasion of, input current, diode pair D1, D3 add forward voltage, Dl, D3 conducting, diode pair D2, D4 add backward voltage, D2, D4 cut-off, circuit just consists of power circuit by power amplifier, diode D1, electromagnet A and electromagnet D, diode D3, and positive one way rectifier voltage is arranged on electromagnet A, D; When slab and girder is bent upwards vibration, displacement is negative value, input current is for negative, diode pair D2, D4 add forward voltage, D2, D4 conducting, diode pair D1, D3 add backward voltage, D1, D3 cut-off, circuit just consists of power circuit by power amplifier, diode D2, electromagnet A and electromagnet D, diode D4, and positive one way rectifier voltage is arranged on electromagnet A, D equally.So repeat down, result just obtains the full-wave rectified voltage of non-filtered on electromagnet A, D, and the pole polarity that is to say electromagnet A, D is constant, and magnetic intensity is controlled.
Computer is processed the displacement signal of displacement transducer input by pid control algorithm, computer calculates corresponding output signal according to the shift value size, this output signal is divided into two-way after power amplifier amplifies, one the tunnel to be carried in pole polarity through the full-wave bridge rectifier circuit of band filter not constant and on electromagnet A, electromagnet D that magnitude of field intensity is controlled, and another road directly is added in pole polarity and magnitude of field intensity all on controlled electromagnet B, electromagnet C.concrete treatment step is, described pid control algorithm is by comparator, with displacement sensor shift value and design least displacement relatively, and when the absolute value of displacement during less than design least displacement absolute value, the control system computer is not sent out control signal, the electromagnet outage, when the absolute value of displacement sensor displacement greater than design least displacement absolute value and when being negative value, show that slab and girder is bent upwards vibration, pid control algorithm calculates corresponding output according to the shift value size, this output is divided into two-way after power amplifier amplifies, one the tunnel is carried in constant and the electromagnet A that magnitude of field intensity is controlled of pole polarity through the full-wave bridge rectifier circuit of band filter not, on D, another road directly is added in all controlled electromagnet B of pole polarity and magnitude of field intensity, on C, so just make between electromagnet A and B and produce repulsive force, produce attraction force between C and D, for direct control structure, electromagnet directly is installed on slab and girder, vibration by the direct control panel beam structure of the active force between electromagnet, produce a clockwise moment of flexure this moment, weaken the vibration that is bent upwards plate-girder.for the indirectly control structure, when plate-girder is bent upwards vibration, be attached to the damping material layer generation shear deformation of the upper and lower side of plate-girder, make the variable torque that slab and girder gets back to the equilibrium position except producing one, can also consume vibrational energy by the shear deformation of damping material layer, make vibration decay as early as possible, in like manner, when the absolute value of displacement sensor displacement greater than design least displacement absolute value and be on the occasion of the time, show that slab and girder is bent downwardly vibration, pid control algorithm calculates corresponding output according to the shift value size, this output is divided into two-way after power amplifier amplifies, one the tunnel is carried in electromagnet A through the full-wave bridge rectifier circuit of band filter not, on D, another road directly and electromagnet B, C connects, so just make between electromagnet A and B and produce attraction force, produce repulsive force between C and D, for direct control system, the vibration of the direct control panel beam structure of the active force between electromagnet, produce a counterclockwise moment of flexure, weaken the reclinate vibration of slab and girder.For the indirectly control structure, when plate-girder is bent downwardly vibration, the damping material that is attached to the upper and lower side of slab and girder is subject to the flip Trim distortion, make the variable torque that slab and girder gets back to the equilibrium position except producing one, also can consume vibrational energy by the shear deformation of damping material layer, make vibration decay as early as possible.
After the utility model was implemented, when slab and girder vibrated, electromagnetic control system utilized pid control algorithm that current direction and the size of control circuit are controlled, and realizes the controllability of native system electromagnet polarity and magnitude of field intensity.when the mechanical system operating condition changes or during environmental change, cause that the system architecture vibration state changes, when displacement transducer, the displacement information that detects is converted into electrical signal and is sent to the computer of electromagnetic control system, this computer compares displacement measurement and control desired value, and calculate size of current and direction according to the pid algorithm of Electromagnetic Control, amplify through power amplifier, the input electromagnet, by changing current direction and the size of electromagnet, thereby change the active force between slab and girder electromagnet and wall electromagnet, produce a variable torque that makes slab and girder get back to the equilibrium position, the vibration of cantilever slab beam structure is decayed fast.Displacement transducer again with the Displacement Feedback measured to the control system computer, by the control to electromagnet pole polarity and magnetic intensity, realized the closed loop control to the slab and girder vibration displacement.
Working principle of the present utility model: electromagnet is that a kind of magnetic effect of electric current of utilizing makes the magnetic device of soft iron core tool, generally speaking, the magnetic field that electromagnet produces is strong and weak relevant with the iron core at size of current, coil turn and center, soft iron rod is inserted solenoid inside, when coil alives, coil inside produces magnetic field and makes the soft iron rod magnetization, the magnetic field that iron staff produces and coil magnetic field stack, solenoidal magnetic intensity strengthens greatly, but after failure of current, the magnetic of coil and soft iron rod just disappears.The pole polarity of electromagnet can be controlled by current direction, and the magnetic field power can be controlled by size of current.The pole polarity of electromagnet and the vibration that magnitude of field intensity is come the control panel beam structure are controlled in the utility model utilization, be fixed on electromagnet and the pole polarity and the magnitude of field intensity that are fixed on electromagnet on slab and girder on wall by displacement transducer and computer control, utilize the two like magnetic poles repel each other principle of opposite sex attraction of magnet to make the resistance (or resisting moment) that produces between magnetic pole with the vibration displacement size variation, and displacement is larger, resistance (or resisting moment) is also just large, thereby the cantilever slab vibration of beam is decayed fast.Displacement transducer is positioned over the upside of slab and girder, and when slab and girder was bent upwards vibration, collecting displacement was negative value; When slab and girder is bent downwardly when vibration, collect displacement on the occasion of.Displacement transducer is converted into electrical signal with the displacement that collects, be sent to the control computer, computer is according to displacement size and symbol and calculate size of current and the direction that be carried on electromagnet according to pid control algorithm, delivers to power amplifier and amplifies, and is applied on electromagnet at last.
When the generation of cantilever slab beam vibration is bent upwards displacement, displacement transducer receives negative displacement signal and this signal is delivered to the computer of control system, the displacement size and Orientation that this computer detects according to displacement transducer, utilize pid control algorithm to calculate power and the direction of corresponding control signal, after amplifying processing, power amplifier is divided into two-way, one the tunnel directly connects all controlled electromagnet B, C of pole polarity and magnitude of field intensity, makes its energising produce magnetic field; The not bridge rectifier of band filter is delivered on another road, the pole polarity that the electric current that this circuit produces produces electromagnet A, D is constant and magnitude of field intensity is controlled, make like this right-hand member of electromagnet A and the left end magnetic pole of electromagnet B be S utmost point generation repulsive force, the right-hand member of electromagnet C is the S utmost point, the left end of electromagnet D is the N utmost point, produces attraction force, thus synthetic variable torque that makes slab and girder get back to the equilibrium position, and displacement is larger, and this opplied moment is also just large.For direct control system, electromagnet directly is installed on slab and girder, and by the vibration of the direct control panel beam structure of the active force between electromagnet, produce a clockwise moment of flexure this moment, thereby weaken the vibration displacement that plate-girder is bent upwards; For indirectly controlled system, increased the damping material layer between electromagnet and slab and girder, when plate-girder is bent upwards vibration, the damping material that is attached to the upper and lower side of plate-girder is out of shape because being subject to shearing force, make the variable torque that slab and girder gets back to the equilibrium position except producing one, also can consume vibrational energy by the shear deformation of damping material layer, thereby make vibration decay as early as possible.
In like manner, when slab and girder is bent downwardly vibration, displacement transducer receives positive displacement signal, the electric current of forward is constant through the bridge rectifier after-current direction of band filter not, and therefore, at this moment the electric current by A, B, C, four electromagnet of D is forward current, the right-hand member pole polarity of electromagnet A is still the S utmost point, the left end pole polarity of electromagnet B becomes the N utmost point, produces attraction force, and the left end pole polarity of the right-hand member of electromagnet C and electromagnet D is the N utmost point and produces repulsive force.For direct control system, the vibration of the direct control panel beam structure of the active force between electromagnet produce a counterclockwise moment of flexure, and displacement is larger, and opplied moment is also just large, thereby weakens the vibration that is bent downwardly slab and girder; For indirectly controlled system, when plate-girder is bent downwardly vibration, the damping material that sticks on the upper and lower side of plate-girder is subject to the flip Trim distortion, make the variable torque that slab and girder gets back to the equilibrium position except producing one, also can consume vibrational energy by the shear deformation of damping material layer, make structural vibration decay as early as possible.
The beneficial effects of the utility model:
1. the utility model combines modern control theory, computer technology and electromagnetic technique, when vibrating, slab and girder spontaneously changes electromagnet pole polarity and magnetic intensity, its vibration is decayed faster, the intelligent ACTIVE CONTROL of realization to the slab and girder vibration, reliability is high, reduced the damage that mechanical system causes because of vibration, the precision of maintenance equipment, the working life of extension device, and suppress the noise pollution that structure produces environment, the physical and mental health that guarantees operator, practical, Economy is high;
2. provide direct control and indirectly control two kinds of slab and girder vibration control systems, the former electromagnet is directly installed on slab and girder, the latter increases the damping material layer between electromagnet and slab and girder, direct effect between magnetic pole, also having the partial vibration energy is that shear deformation by the damping material layer consumes, and reaches the purpose of controlling vibration; Compare with the former, the latter's control effect is more steady;
3. adopt displacement transducer to the vibrational state information Real-Time Monitoring of slab and girder, displacement transducer feeds back to the control system computer with the vibration displacement information of collection plate beam structure, realize the intelligent control of electromagnet pole polarity and magnitude of field intensity, system's control accuracy is high, lightweight, highly sensitive;
4. electromagnet pole polarity is controlled by current direction, and magnitude of field intensity is controlled by the size of electric current, is convenient to the electric and magnetic oscillation control system is carried out self adaptive control;
5. adopt butyl rubber, neoprene, nitrile butadiene rubber and use silicone rubber as damping vibration attenuation material under hot environment, having advantages of that fissipation factor is high;
6. adopt magnet control to produce larger active force to slab and girder, so the utility model is specially adapted to the vibration control of the slab and girder of high rigidity, vibration control is effective;
7. adopt not the full-wave bridge rectifier circuit with filtering, utilize the one-way conduction characteristic of diode to make the current direction of the electromagnet that is connected with bridge rectifier constant, namely the pole polarity of electromagnet is constant, and magnitude of field intensity can be controlled by displacement transducer testing signal size, that this design of the present utility model has is simple in structure, reliability is high, controls effective.
Description of drawings
The active electromagnetic control system of Fig. 1 plate-girder vibration (in figure, stain represents that crossing wire herein connects);
The active electromagnetic damping control system of Fig. 2 plate-girder vibration (in figure, stain represents that crossing wire herein connects);
The active Electromagnetic Control structure of Fig. 3 plate-girder vibration;
The active electromagnetic damping control structure of Fig. 4 plate-girder vibration;
The bridge rectifier of Fig. 5 reactive filter;
Fig. 6 controls software flow pattern (in figure, S is the shift value of sensor measurement, and a is the design least displacement);
Interaction (in figure, arrow is current direction) when the direct control structure of Fig. 7 is bent upwards vibration between electromagnet;
Interaction (in figure, arrow is current direction) when Fig. 8 indirectly control structure is bent upwards vibration between electromagnet;
Interaction (in figure, arrow is current direction) when the direct control structure of Fig. 9 is bent downwardly vibration between electromagnet;
Interaction (in figure, arrow is current direction) when Figure 10 indirectly control structure is bent downwardly vibration between electromagnet;
Figure 11 system control principle drawing;
The sensor signal waveform illustration of Figure 12 (a) control system;
The corresponding waveform illustration of the power amplifier output signal of Figure 12 (b) control system;
The corresponding waveform illustration of the rectification circuit output signal of Figure 12 (c) control system;
In figure: 1. the wall made of nonferromagnetic material, 2. electromagnet, 3. wire, 4. slab and girder, 5. displacement transducer, 6. rectification circuit, 7. restraint layer, 8. damping material layer, A, B, C, D are respectively the numberings of four electromagnet, D1, D2, D3, D4 are respectively four diode numberings of bridge rectifier, and N, S are respectively two polarity of electromagnet.
Embodiment
Below in conjunction with Fig. 1 to Figure 12 and embodiment, the utility model is described further.
a kind of active electromagnetic control system of slab and girder vibration, in conjunction with Fig. 1 to Figure 12 c, described system comprises mechanical part and control section, described mechanical part comprises the wall 1 that the nonferromagnetic material is made, slab and girder 4, electromagnet 2, one end of described slab and girder 4 is connected with wall 1, slab and girder 4 is provided with displacement transducer 5, described electromagnet 2 comprises electromagnet A, electromagnet B, electromagnet C, electromagnet D, electromagnet A wherein, electromagnet C is located in wall 1, described electromagnet B, electromagnet D is located at the both sides of slab and girder 4, described electromagnet A, electromagnet B, the coil winding direction of electromagnet D is identical, electromagnet C coil winding direction and electromagnet A, electromagnet B, electromagnet D winding direction is opposite, electromagnet A and electromagnet D are serially connected by wire 3, electromagnet B and electromagnet C are serially connected by wire 3, the centerline collineation of described electromagnet A and electromagnet B, the centerline collineation of electromagnet C and electromagnet D, described control section comprises computer, power amplifier, the rectification circuit 6 of band filter not, described computer is connected with displacement transducer 5, the power amplifier input end is connected with computer, wherein one tunnel being connected with electromagnet A, electromagnet D through the bridge rectifier of band filter not of power amplifier output terminal, another road directly is connected with electromagnet B, electromagnet C.Power amplifier will be amplified to from the control signal of computer the multiple of setting, make the active force that produces between electromagnet enough large to overcome the vibration of plate-girder, drive circuit is divided into two-way at the power amplifier output terminal, one the tunnel is connected with electromagnet A, D through the bridge rectifier of band filter not, and another road directly is connected with electromagnet B, C.Can realize direct control structure and indirectly control structure are controlled.
Described electromagnet A, electromagnet C are take the central plane of slab and girder 4 as symmetry plane, be located in the wall 1 that the nonferromagnetic material makes symmetrically, described electromagnet B, electromagnet D are located at the both sides of slab and girder 4 symmetrically, the centerline collineation of described electromagnet A and electromagnet B, the centerline collineation of electromagnet C and electromagnet D.
The both sides up and down of described indirectly control slab and girder are provided with damping material layer 8, and described damping material layer 8 outside are provided with restraint layer 7, and described electromagnet B, electromagnet D be located at restraint layer 7 outsides, and near an end of wall.Can realize the indirectly control structure is controlled.
Described displacement transducer 5 is located at upside or the downside of slab and girder, and is positioned at that end away from wall 1.When slab and girder is bent downwardly the displacement that detects of displacement transducer of when vibration on the occasion of, first halftime as shown in Figure 12 a; The displacement that displacement transducer detects when slab and girder is bent upwards vibration is negative value, second halftime as shown in Figure 12 a.displacement transducer is connected with the control system computer by signaling line, computer is connected with electromagnet by power amplifier, its intermediate power amplifier output terminal is divided into two-way, leading up to not, the full-wave bridge rectifier circuit of band filter is connected with electromagnet D with electromagnet A, even power amplifier output control signal is as shown in Figure 12 b like this, its size of current and direction change, and it is constant by the current direction of electromagnet A and electromagnet D, as shown in Figure 12 c, namely pole polarity is always constant, but its magnitude of field intensity can be controlled by adjusting size of current, another road directly is connected with electromagnet C with electromagnet B, and the pole polarity of B and C and magnitude of field intensity can be controlled like this.
Described displacement transducer feeds back to the control system computer to realize the intelligent control of electromagnet pole polarity and magnitude of field intensity with the vibration displacement information of collection plate beam structure, have highly sensitive, volume is little, lightweight characteristics.Displacement transducer is positioned over the upside of slab and girder, and when slab and girder was bent upwards vibration, collecting displacement was negative value; When slab and girder is bent downwardly when vibration, collect displacement on the occasion of.Displacement transducer is converted into electrical signal with the displacement that collects, and is sent to the control computer, and computer is according to displacement size and symbol and calculate control size of current and direction according to pid control algorithm, delivers to power amplifier and amplifies, and is applied on electromagnet at last.
Described indirectly control structural damping material layer adopts butyl rubber, neoprene, nitrile butadiene rubber, hot environment can use silicone rubber.The damping material layer is pasted on two surfaces up and down of slab and girder, and restraint layer is pasted on outside the damping material layer, near an end of wall, electromagnet is installed at restraint layer.
Described electromagnet adopts the solenoid electromagnet, and insertion solenoid inside unshakable in one's determination is also fixed with it.Unshakable in one's determination adopt demagnetization soft iron or silicon steel material are made faster, these materials can make the electromagnet demagnetization immediately of cutting off the power supply, when coil alives, coil inside produces magnetic field and makes the soft iron rod magnetization, the magnetic field that iron staff produces and coil magnetic field stack strengthen solenoidal magnetic field greatly, but after failure of current, the magnetic of coil and soft iron rod just disappears.In the utility model, two blocks of electromagnet of active Electromagnetic Control structure as shown in Figure 3 are directly to be installed on slab and girder, initiatively the electromagnetic damping control structure as shown in Figure 4, to increase damping material layer and constraint material layer between electromagnet and slab and girder, and all the other two blocks of electromagnet are installed on respectively on the wall vertical with slab and girder, and with slab and girder on electromagnet aligned in position (center line of electromagnet is wanted conllinear).By wire, electromagnet is connected respectively on power amplifier, electromagnetic control system sends control signal, through power amplifier, to electromagnet coil power, control sense of current and size by the adjustment of computer pid control algorithm, control pole polarity and the magnitude of field intensity of electromagnet, and then change the active force between slab and girder electromagnet and wall electromagnet, weaken the vibration of slab and girder.
Described rectification circuit adopts the not full-wave bridge rectifier circuit of band filter, by 4 in twos the diodes of docking form, specifically as shown in Figure 5.The bridge rectifier left end connects a road in the power amplifier output terminal, right-hand member meets electromagnet A and electromagnet D, when slab and girder is bent downwardly vibration, displacement be on the occasion of, input current is positive half cycle, diode pair D1, D3 add forward voltage, Dl, D3 conducting, diode pair D2, D4 add backward voltage, D2, D4 cut-off, circuit just consists of power circuit by power amplifier, diode D1, electromagnet A and electromagnet D, diode D3, and positive one way rectifier voltage is arranged on electromagnet A, D; When slab and girder is bent upwards vibration, displacement is negative value, input current is negative half period, diode pair D2, D4 add forward voltage, D2, D4 conducting, diode pair D1, D3 add backward voltage, D1, D3 cut-off, circuit just consists of power circuit by power amplifier, diode D2, electromagnet A and electromagnet D, diode D4, and positive one way rectifier voltage is arranged on electromagnet A, D equally.So repeat down, result just obtains the full-wave rectified voltage of non-filtered on electromagnet A, D, and the pole polarity that is to say electromagnet A, D is constant, and magnetic intensity is controlled.
Described computer is processed the displacement signal of displacement transducer input by pid control algorithm, specifically as shown in Figure 6, computer calculates corresponding output signal according to the shift value size, this output signal is divided into two-way after power amplifier amplifies, one the tunnel to be carried in pole polarity through the full-wave bridge rectifier circuit of band filter not constant and on electromagnet A, electromagnet D that magnitude of field intensity is controlled, and another road directly is added in pole polarity and magnitude of field intensity all on controlled electromagnet B, electromagnet C.concrete treatment step is, described pid control algorithm is by comparator, with displacement sensor shift value and design least displacement relatively, and when the absolute value of shift value during less than design least displacement absolute value, the control system computer is not sent out control signal, the electromagnet outage, when the absolute value of displacement sensor displacement greater than design least displacement absolute value and when being negative value, show that slab and girder is bent upwards vibration, pid control algorithm calculates corresponding output according to the shift value size, this output is divided into two-way after power amplifier amplifies, one the tunnel is carried in constant and the electromagnet A that magnitude of field intensity is controlled of pole polarity through the full-wave bridge rectifier circuit of band filter not, on D, another road directly is added in all controlled electromagnet B of pole polarity and magnitude of field intensity, on C, so just make between electromagnet A and B and produce repulsive force, produce attraction force between C and D, for direct control structure, electromagnet directly is installed on slab and girder, vibration by the direct control panel beam structure of the active force between electromagnet, produce a clockwise moment of flexure as shown in Figure 7 this moment, weaken the vibration that is bent upwards plate-girder.for the indirectly control structure, when plate-girder is bent upwards vibration, be attached to the damping material layer generation shear deformation of the upper and lower side of plate-girder, get back to the variable torque of equilibrium position except producing a slab and girder that makes as shown in Figure 8, can also consume vibrational energy by the shear deformation of damping material layer, make vibration decay as early as possible, in like manner, when the absolute value of displacement sensor displacement greater than design least displacement absolute value and be on the occasion of the time, show that slab and girder is bent downwardly vibration, pid control algorithm calculates corresponding output according to the shift value size, this output is divided into two-way after power amplifier amplifies, one the tunnel is carried in electromagnet A through the full-wave bridge rectifier circuit of band filter not, on D, another road directly and electromagnet B, C connects, so just make between electromagnet A and B and produce attraction force, produce repulsive force between C and D, for direct control system, the vibration of the direct control panel beam structure of the active force between electromagnet, produce a counterclockwise moment of flexure as shown in Figure 9, weaken the reclinate vibration of slab and girder.For the indirectly control structure, when plate-girder is bent downwardly vibration, the damping material that is attached to the upper and lower side of slab and girder is subject to the flip Trim distortion, get back to the variable torque of equilibrium position except producing a slab and girder that makes as shown in figure 10, also can consume vibrational energy by the shear deformation of damping material layer, make vibration decay as early as possible.
After the utility model was implemented, when slab and girder vibrated, electromagnetic control system utilized pid control algorithm that current direction and the size of control circuit are controlled, and specifically as shown in Figure 6, realizes the controllability of native system electromagnet pole polarity and magnitude of field intensity.when the mechanical system operating condition changes or during environmental change, cause that the system architecture vibration state changes, when displacement transducer, the displacement information that detects is converted into electrical signal and is sent to the computer of electromagnetic control system, this computer compares displacement measurement and control desired value, and calculate size of current and direction according to the pid algorithm of Electromagnetic Control, amplify through power amplifier, the input electromagnet, by changing current direction and the size of electromagnet, thereby change the active force between slab and girder electromagnet and wall electromagnet, produce a moment of flexure opposite with the structural bending direction of vibration, the vibration of cantilever slab beam structure is decayed fast.Displacement transducer again with the Displacement Feedback measured to the control system computer, by the control to electromagnet pole polarity and magnetic intensity, realize the closed loop control to vibrating plate beam structure vibration displacement, concrete principle as shown in figure 11.
Although above-mentionedly by reference to the accompanying drawings the embodiment of model utility is described; but be not the restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.
Claims (10)
1. the active electromagnetic control system of slab and girder vibration, it is characterized in that, described system comprises mechanical part and control section, described mechanical part comprises the wall that the nonferromagnetic material is made, slab and girder, electromagnet, one end of described slab and girder is connected with wall, slab and girder is provided with displacement transducer, described electromagnet comprises electromagnet A, electromagnet B, electromagnet C, electromagnet D, electromagnet A wherein, electromagnet C is located in the wall that the nonferromagnetic material makes, described electromagnet B, electromagnet D is located at the both sides of slab and girder, described electromagnet A, electromagnet B, the coil winding direction of electromagnet D is identical, electromagnet C coil winding direction and electromagnet A, electromagnet B, electromagnet D winding direction is opposite, electromagnet A and electromagnet D are serially connected by wire, electromagnet B and electromagnet C are serially connected by wire, described control section comprises computer, power amplifier, the full-wave rectifying circuit of band filter not, described computer is connected with displacement transducer, the power amplifier input end is connected with computer, wherein one tunnel being connected with electromagnet A, electromagnet D through the bridge rectifier of band filter not of power amplifier output terminal, another road directly is connected with electromagnet B, electromagnet C.
2. the active electromagnetic control system of slab and girder as claimed in claim 1 vibration, it is characterized in that, described electromagnet A, electromagnet C are take the central plane of slab and girder (4) as symmetry plane, be located in the wall that the nonferromagnetic material makes symmetrically, described electromagnet B, electromagnet D are located at the both sides of slab and girder symmetrically, the centerline collineation of described electromagnet A and electromagnet B, the centerline collineation of electromagnet C and electromagnet D.
3. the active electromagnetic control system of slab and girder as claimed in claim 1 vibration, it is characterized in that, the upper and lower both sides of described slab and girder are provided with the damping material layer, described damping material layer outside is provided with restraint layer, and described electromagnet B, electromagnet D be located at the restraint layer outside, and near an end of wall.
4. the active electromagnetic control system of slab and girder vibration as claimed in claim 1, is characterized in that, described displacement transducer is located at slab and girder upside or downside, and displacement transducer is located at the end away from wall.
5. the active electromagnetic control system of slab and girder vibration as claimed in claim 3, is characterized in that, described damping material layer adopts butyl rubber or neoprene or nitrile butadiene rubber or silicone rubber.
6. the active electromagnetic control system of slab and girder vibration as claimed in claim 1, is characterized in that, described electromagnet adopts the solenoid electromagnet, and insertion solenoid inside unshakable in one's determination is also fixed with it, and soft iron or the silicon steel material of adopting unshakable in one's determination made.
7. the active electromagnetic control system of slab and girder as claimed in claim 1 vibration, it is characterized in that, described rectification circuit adopts the not full-wave bridge rectifier circuit of band filter, the diode that comprises four docking in twos forms, the bridge rectifier left end connects a road in the power amplifier output terminal, right-hand member meets electromagnet A and electromagnet D, obtains the full-wave rectified voltage of non-filtered on electromagnet A, electromagnet D.
8. the active electromagnetic control system of slab and girder as claimed in claim 1 vibration, it is characterized in that, described computer is processed the displacement signal of displacement transducer input by pid control algorithm, computer calculates corresponding output signal according to the shift value size, this output signal is divided into two-way after power amplifier amplifies, one the tunnel is carried in constant and the electromagnet A that magnitude of field intensity is controlled of pole polarity through the full-wave bridge rectifier circuit of band filter not, on electromagnet D, another road directly is added in all controlled electromagnet B of pole polarity and magnitude of field intensity, on electromagnet C, produce a variable torque that makes slab and girder get back to the equilibrium position.
9. the active electromagnetic control system of slab and girder as claimed in claim 3 vibration, it is characterized in that, described computer is processed the displacement signal of displacement transducer input by pid control algorithm, computer calculates corresponding output signal according to the shift value size, this output signal is divided into two-way after power amplifier amplifies, one the tunnel is carried in constant and the electromagnet A that magnitude of field intensity is controlled of pole polarity through the full-wave bridge rectifier circuit of band filter not, on electromagnet D, another road directly is added in all controlled electromagnet B of pole polarity and magnitude of field intensity, on electromagnet C, producing one makes outside the variable torque that slab and girder gets back to the equilibrium position, simultaneously can also consume vibrational energy by the shear deformation of damping material layer, make vibration decay as early as possible.
10. the active electromagnetic control system of slab and girder as claimed in claim 1 vibration, it is characterized in that, displacement transducer can with the Displacement Feedback measured to the control system computer, by the control to electromagnet pole polarity and magnetic intensity, have been realized the closed loop control to the slab and girder vibration displacement.
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| CN 201320249152 CN203272588U (en) | 2013-05-09 | 2013-05-09 | Active electromagnetic control system for vibration of plate-girder structure |
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| CN 201320249152 CN203272588U (en) | 2013-05-09 | 2013-05-09 | Active electromagnetic control system for vibration of plate-girder structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244603A (en) * | 2013-05-09 | 2013-08-14 | 青岛理工大学 | Active electromagnetic control system for vibration of plate-girder structure |
| CN107370326A (en) * | 2017-08-11 | 2017-11-21 | 金阿依舍 | A kind of electromagnetic vibration machine |
| CN107974805A (en) * | 2017-11-14 | 2018-05-01 | 珠海格力电器股份有限公司 | Vibration damping structure, washing machine and vibration damping method thereof |
| CN112706703A (en) * | 2020-12-30 | 2021-04-27 | 张虎 | Navigator capable of preventing connection part from vibrating and falling off |
-
2013
- 2013-05-09 CN CN 201320249152 patent/CN203272588U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244603A (en) * | 2013-05-09 | 2013-08-14 | 青岛理工大学 | Active electromagnetic control system for vibration of plate-girder structure |
| CN107370326A (en) * | 2017-08-11 | 2017-11-21 | 金阿依舍 | A kind of electromagnetic vibration machine |
| CN107974805A (en) * | 2017-11-14 | 2018-05-01 | 珠海格力电器股份有限公司 | Vibration damping structure, washing machine and vibration damping method thereof |
| CN107974805B (en) * | 2017-11-14 | 2023-06-06 | 珠海格力电器股份有限公司 | Vibration reduction structure, washing machine and vibration reduction method of washing machine |
| CN112706703A (en) * | 2020-12-30 | 2021-04-27 | 张虎 | Navigator capable of preventing connection part from vibrating and falling off |
| CN112706703B (en) * | 2020-12-30 | 2022-09-09 | 高迅导航科技(深圳)有限公司 | Navigator capable of preventing connection part from vibrating and falling off |
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