CN115046725B - Micro-pitching moment measuring device and measuring method thereof - Google Patents
Micro-pitching moment measuring device and measuring method thereof Download PDFInfo
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- CN115046725B CN115046725B CN202210737972.3A CN202210737972A CN115046725B CN 115046725 B CN115046725 B CN 115046725B CN 202210737972 A CN202210737972 A CN 202210737972A CN 115046725 B CN115046725 B CN 115046725B
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- 238000000034 method Methods 0.000 title abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 95
- 238000005259 measurement Methods 0.000 claims description 21
- 239000011159 matrix material Substances 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims description 2
- 238000000691 measurement method Methods 0.000 claims 2
- 238000013461 design Methods 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/04—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of resistance-strain gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/062—Wind tunnel balances; Holding devices combined with measuring arrangements
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- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention belongs to the technical field of wind tunnel tests and discloses a micro pitching moment measuring device and a measuring method thereof. The measuring device comprises a five-component balance and a single-component Mz balance; the five-component balance is a rod type balance, and the single-component Mz balance is a ring type balance; the five-component balance is sleeved with a balance connecting frame, and the single-component Mz balance is fixed through the balance connecting frame; the single-component Mz balance is sleeved with a test model connecting frame, and the test model connecting frame is fixed on the bottom surface of the test model; the insulating sleeve encloses and protects the five-component balance and the single-component Mz balance. The measuring device measures the lift force Y, the axial force X, the side force Z, the yaw moment My and the roll moment Mx through a five-component balance. The free state of micro friction of the test model in the pitching direction is realized by using the deep groove ball bearing, and simultaneously aerodynamic force and aerodynamic moment measured by a five-component balance acting on the test model are transmitted; the minute amount of pitching moment was measured by a single-component Mz balance. The measuring method is simple and reliable and is easy to implement.
Description
Technical Field
The invention belongs to the technical field of wind tunnel tests, and particularly relates to a micro pitching moment measuring device and a measuring method thereof.
Background
For the measurement requirement of the micro pitch moment Mz of the test model of the miniaturized reentry vehicle, the technical data disclosed at present are represented as follows: zhao Junbo et al reentry warhead minor asymmetry the technical research of the measurement technology of the pitching pneumatic characteristics, lv Zhiguo et al ablation tip cone test model shock tunnel test research. The above data show that three measurement devices are generally used: the first is a conventional six-component strain balance, but when the conventional six-component strain balance is used for measurement, the pitching moment generated by ablation is usually small, the weight of a test model is relatively heavy, the ratio of the pitching moment to the test model can reach 2500 times, and load matching is extremely difficult, so that the pitching moment design load of the conventional six-component strain balance tends to be large, and the accuracy of measuring the micro-quantity pitching moment is affected; the second is a single component bearing hinged dynamic balance; the third is a five-component piezoelectric balance. However, when a single-component bearing hinged dynamic balance or a five-component piezoelectric balance is used for measurement, six aerodynamic components with extremely different loads applied to a test model cannot be measured simultaneously, and additional measurement tests can be needed by using other balances, so that the number of vehicles is increased, and the test cost is increased.
Disclosure of Invention
The invention aims to provide a device for measuring the micro pitching moment, and the other technical problem to be solved by the invention is to provide a method for measuring the micro pitching moment.
The invention relates to a micro-quantity pitching moment measuring device which is characterized by comprising a five-component balance and a single-component Mz balance; the five-component balance is a rod type balance, and the single-component Mz balance is a ring type balance;
The five-component balance is sleeved with a balance connecting frame, and the single-component Mz balance is fixed on the five-component balance through the balance connecting frame; the single-component Mz balance is sleeved with a test model connecting frame, the test model connecting frame is fixed on a test model fixing seat, and the test model fixing seat is fixed on the bottom surface of the test model; the heat insulation sleeve is sleeved on the cylindrical boss on the surface of the test model fixing seat, and the heat insulation sleeve seals and protects the five-component balance and the single-component Mz balance.
Further, the rear end of the five-component balance is provided with a positioning conical surface, the positioning conical surface is matched with the inner conical surface of the supporting rod, and the positioning conical surface is fixed at the front end of the supporting rod in a conical surface positioning and wedge tensioning mode;
the front end of the five-component balance is provided with a connecting flange, and the front end of the connecting flange is provided with a protruding cylindrical positioning cylindrical surface.
Further, the balance connecting frame is an n-shaped frame; the front frame of the balance connecting frame is sleeved on a positioning cylindrical surface at the front end of the five-component balance and is fixed on a connecting flange at the front end of the five-component balance through a screw I;
the left frame of the balance connecting frame is provided with an inner bearing seat I and a screw hole; the right frame of balance link is provided with interior bearing frame II and screw hole.
Further, the single-component Mz balance is a square frame, the left side is a left side plate, the right side is a right side plate, a plurality of lath type Mz measuring elements with symmetrical centers are connected between the left side plate and the right side plate, and strain gauges are adhered to the Mz measuring elements;
the left side plate of the single-component Mz balance is a fixed end, and a fixed end positioning hole is formed in the left side plate; the left side plate is fixed on the left frame of the balance connecting frame through a screw II penetrating through the through hole; the balance connecting frame is also provided with a fixed end positioning surface matched with the left frame of the balance connecting frame;
The right side plate of the single-component Mz balance is a free end, and a straight slot hole is formed in the right side plate; a pin hole matched with the clamping plate on the right side of the test model connecting frame is formed; and a limiting boss for limiting the pitching angle of the single-component Mz balance is also arranged.
Further, the test model connecting frame consists of a left side clamping plate and a right side clamping plate which are fixed on a cylindrical boss on the surface of the test model fixing seat;
The left clamping plate of the test model connecting frame is provided with a screw hole, the left outer bearing seat is provided with a through hole, and the left outer bearing seat is fixed on the left clamping plate of the test model connecting frame through a screw III penetrating through the through hole; the outer ring of the left deep groove ball bearing is connected with the left outer bearing seat, and the inner ring is arranged on the inner bearing seat I; the left side plate of the single-component Mz balance is fixed with the left frame of the balance connecting frame through an outer bearing seat on the left side;
The right clamping plate of the test model connecting frame is provided with a screw hole, the outer bearing seat on the right side is provided with a through hole, and the outer bearing seat on the right side is fixed on the right clamping plate of the test model connecting frame through a screw III penetrating through the through hole; the outer ring of the deep groove ball bearing on the right side is connected with the outer bearing seat on the right side, and the inner ring is arranged on the inner bearing seat II; an isolation gap is arranged between a straight slot hole on the right side plate of the single-component Mz balance and the inner bearing seat II; the right side clamping plate of the test model connecting frame is fixedly connected with the right side plate of the single-component Mz balance through a pin.
Further, the test model connecting frame and the test model fixing seat are an integral part and are formed through integral machining.
The invention discloses a method for measuring micro pitching moment, which comprises the following steps:
s10, after the parts are machined and manufactured, carrying out strain gauge adhesion on the five-component balance and the single-component Mz balance;
S20, after the five-component balance is installed on the supporting rod, calibrating the five-component balance on the ground, and obtaining a relation matrix of the load and the voltage signal of the five-component balance; the method comprises the steps of installing a single-component Mz balance on a special calibration device, calibrating the single-component Mz balance on the ground, and obtaining a relation matrix of the single-component Mz balance load and a voltage signal;
S30, after the single-component Mz balance is positioned on the balance connecting frame, the balance connecting frame is arranged on the five-component balance; then sequentially installing a test model connecting frame, an inner bearing seat I, an inner bearing seat II, a deep groove ball bearing, an outer bearing seat and a pin according to the sequence of the fixed end and the free end;
S40, after the installation is completed, installing a special loading head on the test model connecting sleeve, loading by using a standard load, and testing the measurement accuracy of the single-component Mz balance on the measurement of the micro pitching moment;
S50, installing the micro pitching moment measuring device which is completed in installation and calibration in a test wind tunnel, installing a test model, powering on each measuring bridge of the five-component balance and the single-component Mz balance, and checking and confirming that each bridge signal is output normally;
s60, starting a test, collecting voltage signals of each measuring bridge, and reversely calculating the voltage signals into aerodynamic values through a relation matrix calibrated in the step S20 to finish measurement.
The micro pitch moment measuring device can simultaneously measure six aerodynamic forces and moments with extremely different loads acting on a test model, and has the following technical characteristics:
firstly, the micro-quantity pitching moment load can be matched with the single-component Mz balance design load, and meanwhile, the measurement interference of the test model weight on the micro-quantity pitching moment is reduced;
Secondly, all components of the five-component balance and the single-component Mz balance which form the measurement assembly are all arranged in the cavity of the test model, so that the temperature effect is effectively reduced under the high-temperature test condition, and the uncertainty of test data is reduced;
Thirdly, the test scheme is simple, repeated assembly is not needed, and the test and data correction and analysis are easy;
And fourthly, the wind tunnel test device can be repeatedly utilized, and when the appearance of the test model is changed and the loads are similar, the corresponding wind tunnel test can be carried out by only redesigning the bottom surface of the test model according to the test model fixing seat.
The micro pitching moment measuring device disclosed by the invention realizes measurement of lift force Y, axial force X, side force Z, yaw moment My and rolling moment Mx by using a five-component balance through ingenious structural layout design. The micro friction free state of the test model in the pitching direction is realized by using the deep groove ball bearing, and 5 aerodynamic forces and aerodynamic moments which are measured by a five-component balance and act on the test model are transmitted simultaneously; the measurement of the minute amount of pitching moment Mz is achieved by a single-component Mz balance. The method for measuring the micro pitching moment is simple and reliable and is easy to implement.
Drawings
FIG. 1 is a schematic perspective view of a minute amount pitching moment measuring device of the present invention (left side cross-sectional view I);
FIG. 2 is a schematic perspective view of a minute amount pitching moment measuring device of the present invention (left side cross-sectional view II);
FIG. 3 is a schematic perspective view of the minute amount pitching moment measuring device of the present invention (right side cross-sectional view I);
FIG. 4 is a schematic perspective view of a minute amount pitching moment measuring device of the present invention (right side cross-sectional view II);
FIG. 5 is a schematic perspective view of a single component Mz balance in the micro-scale pitching moment measuring device of the present invention;
Fig. 6 is a schematic perspective view of a five-component balance in the micro-scale pitching moment measuring device of the present invention.
In the figure, 1, a supporting rod; 2. a five component balance; 3. a balance connecting frame; 4. a screw I; 5. a single component Mz balance; 6. an inner bearing seat I; 7. a screw II; 8. deep groove ball bearings; 9. an outer bearing housing; 10. a screw III; 11. test model connecting frame; 12. a heat insulating sleeve; 13. an inner bearing seat II; 14. a pin; 15. the test model fixing seat; 16. a connecting flange; 17. positioning a cylindrical surface; 18. positioning a conical surface; 19. a pin hole; 20. a limit boss; 21. a straight slot; 22. a fixed end positioning hole; 23. a fixed end positioning surface; mz measurement element.
Detailed Description
The invention is described in detail below with reference to the drawings and examples.
As shown in fig. 1, the rear end of the five-component balance 2 is connected with the supporting rod 1 through a positioning conical surface 18 and is tensioned and fixed by a wedge. The front end of the five-component balance 2 is connected with the balance connecting frame 3 through a positioning cylindrical surface 17 and is fixed by a connecting flange 16 through a screw I4. The test model connecting frame 11 and the heat insulation sleeve 12 are respectively installed in a tight fit and positioning way through the step cylinder on the test model fixing seat 15. The bottom of the test model connecting frame 11 is provided with 6 through holes for fixedly connecting the test model connecting frame 11 and the test model through screws.
As shown in fig. 2, the left side plate of the single-component Mz balance 5 is a fixed end, and the left side plate of the single-component Mz balance 5 and the balance connecting frame 3 are positioned through a plane. The screw II 7 penetrates through a counter bore in the inner bearing seat I6 and a through hole of the left side plate of the single-component Mz balance 5, the inner bearing seat I6, the left side plate of the single-component Mz balance 5 and the balance connecting frame 3 are fixedly connected, and the inner bearing seat I6, the left side plate of the single-component Mz balance 5 and the balance connecting frame 3 are positioned through cylindrical surfaces. The inner ring of the deep groove ball bearing 8 is positioned and installed with the inner bearing seat I6 through the cylindrical surface tight fit, and the outer ring of the deep groove ball bearing 8 is positioned and installed with the outer bearing seat 9 through the cylindrical surface tight fit. The outer bearing seat 9 and the test model connecting frame 11 are connected and installed through 4 screws III 10. At this time, the mold connecting frame can rotate around the shaft of the inner bearing seat I6.
As shown in fig. 3, the right side plate of the single-component Mz balance 5 is a free end, and the inner bearing seat ii 13 is fixedly connected with the balance connecting frame 3 through 2 screws ii 7 by cylindrical surface positioning. The right side plate of the single-component Mz balance 5 is provided with a straight slot hole 21 which is larger than the outer shape of the inner bearing seat II 13 and is not contacted with the inner bearing seat II 13, and the right side plate of the single-component Mz balance 5 is in a free state. The inner ring of the deep groove ball bearing 8 is positioned and installed with the inner bearing seat II 13 through the cylindrical surface tight fit, and the outer ring of the deep groove ball bearing 8 is positioned and installed with the outer bearing seat 9 through the cylindrical surface tight fit. The outer bearing seat 9 and the test model connecting frame 11 are connected and installed through 4 screws III 10. The inner bearing seat I6 and the inner bearing seat II 13 are coaxial, and at this time, the test model connecting frame 11 can rotate around the axis of the inner bearing seat I6.
As shown in fig. 4, on the right side plate of the single-component Mz balance 5, i.e., the free end side, the test model connecting frame 11 and the right side plate of the single-component Mz balance 5 are positioned and installed in a cylindrical tight fit manner through the upper pin and the lower pin 14, so that the right side plate of the single-component Mz balance 5 can rotate around the axis of the inner bearing seat ii 13 along with the test model connecting frame 11. At this time, the right side plate of the single-component Mz scale 5 is fixed to the scale connection frame 3, and the right side plate rotates with the test model connection frame 11, so that the lath-shaped Mz measuring element 24 in the middle of the single-component Mz scale 5 deforms, and the strain gauge outputs an Mz data signal.
As shown in fig. 5, the five-component balance 2 is a conventional lever type strain balance, and is mainly used for measuring the lift force Y, the axial force X, the side force Z, the yaw moment My and the roll moment Mx of the test model. The front end of the five-component balance 2 is a connecting flange 16, 2 threaded holes are formed in the connecting flange 16, and the front end of the connecting flange 16 is a positioning cylindrical surface 17 used for positioning and mounting the balance connecting frame 3.
As shown in fig. 6, the single-component Mz balance 5 is a ring balance, the left side plate is a fixed end, the right side plate is a free end, and the middle is an Mz measuring element 24. The Mz measuring element 24 is a 4-piece slat type thin beam spaced 90 degrees apart. The left side plate of the single-component Mz balance 5 is provided with a positioning hole and a threaded hole for positioning and mounting with the inner bearing seat I6. The left side plate of the single-component Mz balance 5 is provided with a positioning surface for positioning with the balance connection frame 3. The right side plate of the single-component Mz balance 5 is provided with pin holes 19 for connection with the test model connection frame 11. The right side plate of the single-component Mz balance 5 is provided with an upper limit boss 20 and a lower limit boss 20, after installation is completed, a balance connecting frame 3 is arranged in the middle of the 2 limit bosses 20, a certain distance is reserved between the two limit bosses and the balance connecting frame 3, after the right side plate of the single-component Mz balance 5 rotates around a shaft along with the test model connecting frame 11, deformation displacement occurs, and deformation is prevented from continuously becoming larger after the limit bosses 20 are contacted with the balance connecting frame 3, so that the Mz measuring element 24 is protected. The right side plate of the single-component Mz balance 5 is provided with a straight slot hole 21 with a size larger than that of the inner bearing seat II 13, so that the right side plate is ensured not to be contacted with the inner bearing seat II 13 during use, and the free state of the right side plate is ensured.
The method for measuring the micro pitch moment in the embodiment is as follows:
s10, after the parts are processed and manufactured, strain gauge pasting is carried out on the five-component balance 2 and the single-component Mz balance 5;
S20, after the five-component balance 2 is installed on the support rod 1, calibrating the five-component balance 2 on the ground, and obtaining a relation matrix of the load and the voltage signal of the five-component balance 2; the single-component Mz balance 5 is installed on a special calibration device, the single-component Mz balance 5 is calibrated on the ground, and a relation matrix of the load and the voltage signal of the single-component Mz balance 5 is obtained;
S30, after the single-component Mz balance 5 is positioned on the balance connecting frame 3, the balance connecting frame 3 is arranged on the five-component balance 2; then sequentially installing a test model connecting frame 11, an inner bearing seat I6, an inner bearing seat II 13, a deep groove ball bearing 8, an outer bearing seat 9 and a pin 14 according to the sequence of fixing the end and then fixing the free end;
s40, after the installation is completed, installing a special loading head on the test model connecting sleeve, loading by using a standard load, and testing the measurement accuracy of the single-component Mz balance 5 on the measurement of the micro pitching moment;
s50, installing the micro pitching moment measuring device which is completely installed and calibrated in a test wind tunnel, installing a test model, electrifying each measuring bridge of the five-component balance 2 and the single-component Mz balance 5, and checking and confirming that each bridge signal is output normally;
s60, starting a test, collecting voltage signals of each measuring bridge, and reversely calculating the voltage signals into aerodynamic values through a relation matrix calibrated in the step S20 to finish measurement.
Although the embodiments of the present invention have been disclosed above, it is not limited to the use listed in the specification and the embodiments, but it can be fully applied to various fields suitable for the present invention. It will be apparent to one skilled in the art that the invention is not limited to the specific details and illustrations shown and described herein without departing from the general concepts defined in the claims and their equivalents.
Claims (3)
1. The micro-quantity pitching moment measuring device is characterized by comprising a five-component balance (2) and a single-component Mz balance (5); the five-component balance (2) is a rod type balance, and the single-component Mz balance (5) is a ring type balance;
the five-component balance (2) is sleeved with a balance connecting frame (3), and the single-component Mz balance (5) is fixed on the five-component balance (2) through the balance connecting frame (3); the single-component Mz balance (5) is sleeved with a test model connecting frame (11), the test model connecting frame (11) is fixed on a test model fixing seat (15), and the test model fixing seat (15) is fixed on the bottom surface of a test model; the heat insulation sleeve (12) is sleeved on a cylindrical boss on the surface of the test model fixing seat (15), and the heat insulation sleeve (12) seals and protects the five-component balance (2) and the single-component Mz balance (5);
The rear end of the five-component balance (2) is provided with a positioning conical surface (18), the positioning conical surface (18) is matched with the inner conical surface of the supporting rod (1), and the positioning conical surface is fixed at the front end of the supporting rod (1) in a conical surface positioning and wedge tensioning mode;
The front end of the five-component balance (2) is provided with a connecting flange (16), and the front end of the connecting flange (16) is provided with a protruding cylindrical positioning cylindrical surface (17);
The balance connecting frame (3) is an n-shaped frame; the front frame of the balance connecting frame (3) is sleeved on a positioning cylindrical surface (17) at the front end of the five-component balance (2) and is fixed on a connecting flange (16) at the front end of the five-component balance (2) through a screw I (4);
The left frame of the balance connecting frame (3) is provided with an inner bearing seat I (6) and a screw hole; the right frame of the balance connecting frame (3) is provided with an inner bearing seat II (13) and screw holes;
The single-component Mz balance (5) is a square frame, the left side is a left side plate, the right side is a right side plate, a plurality of strip-type Mz measuring elements (24) with symmetrical centers are connected between the left side plate and the right side plate, and strain gauges are adhered to the Mz measuring elements (24);
The left side plate of the single-component Mz balance (5) is a fixed end, and a fixed end positioning hole (22) is formed in the left side plate; the left side plate is fixed on the left frame of the balance connecting frame (3) through a screw II (7) penetrating through the through hole; the balance is also provided with a fixed end positioning surface (23) matched with the left frame of the balance connecting frame (3);
The right side plate of the single-component Mz balance (5) is a free end, and a straight slot hole (21) is formed in the right side plate; a pin hole (19) matched with the clamping plate on the right side of the test model connecting frame (11) is arranged; a limiting boss (20) for limiting the pitching angle of the single-component Mz balance (5) is also arranged;
The test model connecting frame (11) consists of a left clamping plate and a right clamping plate which are fixed on a cylindrical boss on the surface of the test model fixing seat (15);
The left clamping plate of the test model connecting frame (11) is provided with a screw hole, the left outer bearing seat (9) is provided with a through hole, and the left outer bearing seat (9) is fixed on the left clamping plate of the test model connecting frame (11) through a screw III (10) penetrating through the through hole; the outer ring of the left deep groove ball bearing (8) is connected with the left outer bearing seat (9), and the inner ring is arranged on the inner bearing seat I (6); the left side plate of the single-component Mz balance (5) is fixed with the left frame of the balance connecting frame (3) through an outer bearing seat (9) at the left side;
The right clamping plate of the test model connecting frame (11) is provided with a screw hole, the right outer bearing seat (9) is provided with a through hole, and the right outer bearing seat (9) is fixed on the right clamping plate of the test model connecting frame (11) through a screw III (10) penetrating through the through hole; the outer ring of the deep groove ball bearing (8) on the right side is connected with the outer bearing seat (9) on the right side, and the inner ring is arranged on the inner bearing seat II (13); an isolation gap is arranged between a straight slot hole (21) on the right side plate of the single-component Mz balance (5) and the inner bearing seat II (13); the right clamping plate of the test model connecting frame (11) is fixedly connected with the right side plate of the single-component Mz balance (5) through a pin (14).
2. The device for measuring the micro pitching moment according to claim 1, wherein the test model connecting frame (11) and the test model fixing seat (15) are integrated components and are formed by integral machining.
3. The measurement method of a micro-pitch moment measurement device according to any one of claims 1 to 2, wherein the measurement method comprises the steps of:
S10, after the parts are machined and manufactured, strain gauge pasting is carried out on the five-component balance (2) and the single-component Mz balance (5);
S20, after the five-component balance (2) is installed on the supporting rod (1), calibrating the five-component balance (2) on the ground, and obtaining a relation matrix of the load and the voltage signal of the five-component balance (2); the single-component Mz balance (5) is installed on a special calibration device, the single-component Mz balance (5) is calibrated on the ground, and a relation matrix of the load and the voltage signal of the single-component Mz balance (5) is obtained;
S30, after the single-component Mz balance (5) is positioned on the balance connecting frame (3), the balance connecting frame (3) is arranged on the five-component balance (2); then sequentially installing a test model connecting frame (11), an inner bearing seat I (6), an inner bearing seat II (13), a deep groove ball bearing (8), an outer bearing seat (9) and a pin (14) according to the sequence of the fixed end and the free end;
S40, after the installation is completed, installing a special loading head on the test model connecting sleeve, loading by using a standard load, and testing the measurement accuracy of the single-component Mz balance (5) on the measurement of the micro pitching moment;
S50, installing a tiny pitching moment measuring device which is completely installed and calibrated in a test wind tunnel, installing a test model, powering on each measuring bridge of a five-component balance (2) and a single-component Mz balance (5), and checking and confirming that each bridge signal is output normally;
s60, starting a test, collecting voltage signals of each measuring bridge, and reversely calculating the voltage signals into aerodynamic values through a relation matrix calibrated in the step S20 to finish measurement.
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| CN202210737972.3A CN115046725B (en) | 2022-06-28 | 2022-06-28 | Micro-pitching moment measuring device and measuring method thereof |
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| CN202210737972.3A CN115046725B (en) | 2022-06-28 | 2022-06-28 | Micro-pitching moment measuring device and measuring method thereof |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114152403A (en) * | 2022-02-08 | 2022-03-08 | 中国空气动力研究与发展中心超高速空气动力研究所 | High-precision pitching moment measuring device based on mechanical bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104990683B (en) * | 2015-07-21 | 2018-02-06 | 中国空气动力研究与发展中心高速空气动力研究所 | One kind segmentation type micro hinge moment balance |
| JP2017166870A (en) * | 2016-03-14 | 2017-09-21 | 三菱重工業株式会社 | Balance for wind tunnel test and wind tunnel test device |
| CN106840590B (en) * | 2016-12-21 | 2019-01-11 | 中国航天空气动力技术研究院 | A kind of five component dynamic pitching balance of miniaturized large-load integral type |
| RU2717746C1 (en) * | 2019-08-08 | 2020-03-25 | Федеральное государственное унитарное предприятие "Центральный аэрогидродинамический институт имени профессора Н.Е. Жуковского" (ФГУП "ЦАГИ)" | Multicomponent tensometric balance |
| CN112504554B (en) * | 2020-10-19 | 2022-11-04 | 中国空气动力研究与发展中心高速空气动力研究所 | Calibration method of six-component high-precision micro-rolling torque measurement device |
| CN112525481A (en) * | 2020-10-19 | 2021-03-19 | 中国空气动力研究与发展中心高速空气动力研究所 | Six-component high-precision micro rolling torque measuring device and measuring method |
| CN113670564A (en) * | 2021-07-22 | 2021-11-19 | 北京航空航天大学 | Combined probe and method for measuring flow field of interstage tip region of small compressor |
| CN114152404B (en) * | 2022-02-08 | 2022-09-06 | 中国空气动力研究与发展中心超高速空气动力研究所 | High-precision pitching moment measuring device based on air bearing |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114152403A (en) * | 2022-02-08 | 2022-03-08 | 中国空气动力研究与发展中心超高速空气动力研究所 | High-precision pitching moment measuring device based on mechanical bearing |
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