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CN102944422A - Driving load fatigue representing and testing method for transmission system of automobile - Google Patents

Driving load fatigue representing and testing method for transmission system of automobile Download PDF

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Publication number
CN102944422A
CN102944422A CN2012105379015A CN201210537901A CN102944422A CN 102944422 A CN102944422 A CN 102944422A CN 2012105379015 A CN2012105379015 A CN 2012105379015A CN 201210537901 A CN201210537901 A CN 201210537901A CN 102944422 A CN102944422 A CN 102944422A
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signal
vibration exciter
gear
linear vibration
formula
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CN102944422B (en
Inventor
邹喜红
石晓辉
施全
郝建军
张志刚
余勇
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Chongqing University of Technology
Chongqing Academy of Science and Technology
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Chongqing University of Technology
Chongqing Academy of Science and Technology
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Abstract

The invention discloses a driving load fatigue representing and testing method for a transmission system of an automobile, comprising the following steps of: (1) acquiring a transmission input torque, a driving wheel axle vibration acceleration and a transmission gear signal on a test field; (2) acquiring expected response signals when the automobile actually runs at all gears; (3) mounting a transmission system and calculating a frequency response function of the system; (4) calculating initial driving signals of a linear vibration exciter and a torque vibration exciter; (5) calculating a driving signal correction corresponding to an error, and recording a final driving signal at the gear; (6) acquiring final driving signals at all the gears; and (7) carrying out a fatigue durability test on the transmission system by respectively taking the final driving signals at all the gears as inputs. The method can be used for well reflecting the load of the transmission system of the automobile in the actual running process and simulating and representing stress and fatigue conditions of the transmission system indoors when the automobile runs actually, so that the fatigue life of the transmission system of the automobile is accurately and efficiently checked indoors.

Description

The car transmissions tired test method of reproducing of load of travelling
Technical field
The present invention relates to a kind of car transmissions method for testing performance, relate in particular to a kind of car transmissions tired test method of reproducing of load of travelling.
Background technology
The most car all is preposition forerunner's arrangement form, and its kinematic train mainly is comprised of variator (main reducing gear and differential mechanism and variator are integrated) and length semiaxis, and these component combinations play a part to be the running car transmitting torque together.Car transmissions are subject to the effect of alternate torque and the double action of the dynamic loading that the wheel bob causes in the actual travel process, the destruction of its parts and assembly, the overwhelming majority is because the inefficacy that causes under these two kinds of load actings in conjunction, for indoor car transmissions fatigue reliability performance being verified and is examined, need to simulate and reproduce two kinds of the car transmissions load of mainly travelling, then carry out fatigue life test under the load condition that reproduces, this will improve experimental accuracy and efficient greatly.At present, also there are not car transmissions moment of torsion and wheel bob dynamic loading simultaneously test unit and the method for simulation reconstruction both at home and abroad.
Summary of the invention
For above shortcomings in the prior art, the invention provides a kind of car transmissions tired test method of reproducing of load of travelling.This test method can reflect well that vehicle transmission ties up to the load of real vehicle in travelling, in stressing conditions and the tired situation of lab simulation reproducing car transmissions when real vehicle travels, to automotive transmission fatigue lifetime in the indoor examination of carrying out precise and high efficiency.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme:
The car transmissions tired test method of reproducing of load of travelling, adopted in the method a kind of car transmissions tired pilot system of reproducing of load of travelling, this pilot system comprises the first linear vibration exciter, the second linear vibration exciter, the first hold-down support, the second hold-down support, acceleration transducer, reverse vibration generator, torque sensor and computer control system; Described the first linear vibration exciter and the second linear vibration exciter vertically arrange, on the piston rod of the first linear vibration exciter and the second linear vibration exciter, a brace table is set respectively, each brace table is provided with the relative support slide unit of this brace table horizontal slip, described the first hold-down support vertically is fixed on the support slide unit of the first linear vibration exciter top, described the second hold-down support vertically is fixed on the support slide unit of the second linear vibration exciter top, be equipped with acceleration transducer on described the first hold-down support and the second hold-down support, described torque sensor is connected with reverse vibration generator, described the first linear vibration exciter, the second linear vibration exciter and reverse vibration generator are controlled by computer control system, the signal input computer control system that acceleration transducer and torque sensor gather;
The method comprises the steps:
(1), at transmission input shaft the strain-type torque sensor is installed, acceleration transducer is installed on the wheel hub, is gathered the vibration acceleration of gear-box input torque and output terminal at the testing field, and gather simultaneously the Transmission gear signal;
(2), according to gear signal, torque signal and the acceleration signal that gathers carried out cutting, rejects the singular term pre-service, the Expected Response signal when obtaining each gear actual travel, the Expected Response signal when recording this gear actual travel is , be 1 * 3 matrix;
(3), car transmissions are installed in car transmissions and travel that load is tired to be reproduced on the pilot system, reverse vibration generator is connected with the power input shaft of variator, the moving semiaxis of long pass of variator is fixedly connected with the first hold-down support, the moving semiaxis of the short pass of variator is fixedly connected with the second hold-down support, by computer control system linear vibration exciter and reverse vibration generator is applied white noise signal , the response signal of collecting acceleration transducer and torque sensor
Figure 2012105379015100002DEST_PATH_IMAGE006
, calculate the frequency response function of this pilot system by formula (1)
Figure 2012105379015100002DEST_PATH_IMAGE008
Figure 2012105379015100002DEST_PATH_IMAGE010
（1）
In the formula:
Figure 2012105379015100002DEST_PATH_IMAGE012
-white noise signal
Figure 2012105379015100002DEST_PATH_IMAGE014
Autopower spectral density;
Figure 2012105379015100002DEST_PATH_IMAGE016
-white noise signal
Figure 429335DEST_PATH_IMAGE014
With the sensor response signal
Figure 608644DEST_PATH_IMAGE006
Between cross-spectral density;
Frequency response function between-acceleration transducer and torque sensor and linear vibration exciter and the reverse vibration generator is 3 * 3 matrixes;
Expected Response signal during (4), with this gear actual travel
Figure 402604DEST_PATH_IMAGE002
Be simulated target, according to the initial driving signal of formula (2) and (3) calculated line vibrator and reverse vibration generator:
Figure 2012105379015100002DEST_PATH_IMAGE018
（2）
Figure 2012105379015100002DEST_PATH_IMAGE020
（3）
In the formula:
Figure 2012105379015100002DEST_PATH_IMAGE022
-
Figure 610207DEST_PATH_IMAGE008
Inverse matrix;
-Expected Response signal
Figure 2012105379015100002DEST_PATH_IMAGE026
Fourier transform;
Figure 2012105379015100002DEST_PATH_IMAGE028
-linear vibration exciter and reverse vibration generator initially drive signal;
Figure 2012105379015100002DEST_PATH_IMAGE030
-
Figure 152178DEST_PATH_IMAGE028
Fourier transform;
(5), with initial drive linear vibration exciter and reverse vibration generator, gather simultaneously the response signal of acceleration transducer and torque sensor
Figure 2012105379015100002DEST_PATH_IMAGE032
, calculate time domain response and frequency domain response weighted error with formula (4), (5), (6) and (7), use driving signal correction amount corresponding to formula (8) and (9) error of calculation:
Figure 2012105379015100002DEST_PATH_IMAGE034
（4）
Figure 2012105379015100002DEST_PATH_IMAGE036
（5）
Figure 2012105379015100002DEST_PATH_IMAGE038
（6）
Figure 2012105379015100002DEST_PATH_IMAGE040
（7）
（8）
Figure 2012105379015100002DEST_PATH_IMAGE044
（9）
In the formula: -time domain response error signal;
Figure 2012105379015100002DEST_PATH_IMAGE048
-sensor response signal
Figure 797704DEST_PATH_IMAGE032
Fourier transform;
Figure 2012105379015100002DEST_PATH_IMAGE050
-frequency domain response error signal;
Figure 2012105379015100002DEST_PATH_IMAGE052
-frequency domain response error signal
Figure 171048DEST_PATH_IMAGE050
Inverse Fourier transform;
Figure 2012105379015100002DEST_PATH_IMAGE054
-time domain response and frequency domain response weighted error;
Figure 2012105379015100002DEST_PATH_IMAGE056
-
Figure 818061DEST_PATH_IMAGE054
Fourier transform;
Figure 2012105379015100002DEST_PATH_IMAGE058
The corresponding signal that drives of-error;
Figure 2012105379015100002DEST_PATH_IMAGE060
-
Figure 706382DEST_PATH_IMAGE058
Fourier transform;
Revising the driving signal is
Figure 2012105379015100002DEST_PATH_IMAGE062
In the formula
Figure 2012105379015100002DEST_PATH_IMAGE064
Be attenuation coefficient, initial value gets 0.5 usually, suitably increases or reduces according to the iteration convergence situation, but must satisfy: 0＜
Figure 461324DEST_PATH_IMAGE064
≤ 1;
Drive signal to revise
Figure 2012105379015100002DEST_PATH_IMAGE066
As driving, constantly repeat the process of front in this step and carry out iteration, and with the real-time error of calculation value of formula (10)
Figure 2012105379015100002DEST_PATH_IMAGE068
, when each sensor response error≤5%, the final signal that drives of record, this finally drives the final driving signal that signal is this gear;
Figure 2012105379015100002DEST_PATH_IMAGE070
（10）
In the formula:
Figure 626857DEST_PATH_IMAGE068
-the nInferior iteration error value;
Figure 2012105379015100002DEST_PATH_IMAGE072
-the nThe response signal that inferior iteration gathers;
Figure 2012105379015100002DEST_PATH_IMAGE074
-
Figure 507089DEST_PATH_IMAGE072
Fourier transform;
(6), repeating step (4) and step (5), the Expected Response signal during to each gear actual travel of variator carries out simulative iteration, obtains the final driving signal of each gear;
(7), finally drive signal as input take each gear respectively, variator is fixed on corresponding gear, kinematic train is carried out the fatigue durability test.
Compared with prior art, the car transmissions of the present invention tired test method of reproducing of load of travelling has following advantage:
1, uses linear vibration exciter and reverse vibration generator respectively simulated automotive kinematic train output axle shaft wheel bob dynamic loading and automotive transmission actual travel torsion load, reflected that well vehicle transmission ties up to the load of real vehicle in travelling.
2, use the multi parameters control method of time domain error and error of frequency domain weighting, in stressing conditions and the tired situation of lab simulation reproducing car transmissions when real vehicle travels, to automotive transmission fatigue lifetime in the indoor examination of carrying out precise and high efficiency.
Description of drawings
Fig. 1 is the car transmissions tired front views that reproduce pilot system of load that travel;
Fig. 2 is the car transmissions tired vertical views that reproduce pilot system of load that travel.
In the accompanying drawing: 1-mounting foundation; The 2-the first linear vibration exciter; 3-support slide unit; The 4-the first hold-down support; 5-acceleration transducer; Semiaxis is moved in 6-long pass; 7-reverse vibration generator; 8-torque sensor; 9-variator bearing; 10-variator; Semiaxis is moved in 11-short pass; 12-support platform; 13-support platform column; 14-torque sensor; 15-reverse vibration generator pedestal; 16-brace table; The 17-the second linear vibration exciter; The 18-the second hold-down support.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
The car transmissions tired test method of reproducing of load of travelling has adopted a kind of car transmissions tired pilot system of reproducing of load of travelling in the method.As shown in Figure 1, 2, these car transmissions tired pilot system of reproducing of load of travelling comprises mounting foundation 1, variator bearing 9, support platform 12, support platform column 13, torque sensor pedestal 14, reverse vibration generator pedestal 15, the first linear vibration exciter 2, the second linear vibration exciter 17, the first hold-down support 4, the second hold-down support 18, acceleration transducer 5, reverse vibration generator 7, torque sensor 8 and computer control system.The first linear vibration exciter 2 and the second linear vibration exciter 17 vertically are arranged on the mounting foundation 1, are used for the bob of simulating wheel.Support platform 12 is horizontally set on the top of mounting foundation 1 by three support platform columns 13, and support platform 12 is used for supporting reverse vibration generator 7, torque sensor 8 and variator 10.One brace table 16 is set respectively on the piston rod of the first linear vibration exciter 2 and the second linear vibration exciter 3, each brace table 16 is provided with the relative support slide unit 3 of these brace table 16 horizontal slips, the effect of supporting slide unit 3 is to support hold-down support, supporting simultaneously slide unit 3 can slide by along continuous straight runs on brace table 16, the variation of distance during with compensation wheel bob.The first hold-down support 4 vertically is fixed on the support slide unit 3 of the first linear vibration exciter 2 tops, the second hold-down support 18 vertically is fixed on the support slide unit 3 of the second linear vibration exciter 17 tops, is equipped with acceleration transducer 5 on the first hold-down support 4 and the second hold-down support 18.Torque sensor 8 is installed on the support platform 12 by torque sensor pedestal 14, and reverse vibration generator 7 is installed on the support platform 12 by reverse vibration generator pedestal 15, and variator 10 is installed on the support platform 12 by variator bearing 9.Torque sensor 8 is connected with reverse vibration generator 7 and is connected with the power input shaft of variator 10 by reverse vibration generator 7, and reverse vibration generator 7 is used for simulated engine and outputs to dynamically reversing of variator.The first linear vibration exciter 2, the second linear vibration exciter 17 and reverse vibration generator 7 are by computer control system control, and the signal that acceleration transducer 5 and torque sensor 8 gather is inputted computer control system.
The ultimate principle of this pilot system is: the acceleration that at first gathers automotive transmission input torque and wheel hub vertical direction when real vehicle travels, and carry out signal cutting and processing according to gear, then apply respectively white noise signal with linear vibration exciter and reverse vibration generator, gather the output of acceleration transducer and torque sensor, calculate the frequency response function of this pilot system, the analysis of wheel vertical directional acceleration and the torque that gather when travelling according to real vehicle, calculated line vibrator and reverse vibration generator input signal, and constantly carry out iteration, the analysis of wheel vertical directional acceleration and the drive train torque that when acceleration transducer and torque sensor simulate real vehicle and travel, gather, so that the load of travelling of power train is well reproduced in this system, under the real load condition, carry out torture test according to each gear at last.
These car transmissions tired test method of reproducing of load of travelling comprises the steps:
(1), at transmission input shaft the strain-type torque sensor is installed, acceleration transducer is installed on the wheel hub, is gathered the vibration acceleration of gear-box input torque and output terminal at the testing field, and gather simultaneously the Transmission gear signal.
(2), according to gear signal, torque signal and the acceleration signal that gathers carried out cutting, rejects the singular term pre-service, the Expected Response signal when obtaining each gear actual travel, the Expected Response signal when recording this gear actual travel is , be 1 * 3 matrix.
(3), car transmissions are installed in car transmissions and travel that load is tired to be reproduced on the pilot system, reverse vibration generator is connected with the power input shaft of variator, the moving semiaxis of long pass of variator is fixedly connected with the first hold-down support, the moving semiaxis of the short pass of variator is fixedly connected with the second hold-down support, by computer control system linear vibration exciter and reverse vibration generator is applied white noise signal
Figure 241007DEST_PATH_IMAGE004
, the response signal of collecting acceleration transducer and torque sensor
Figure 713576DEST_PATH_IMAGE006
, calculate the frequency response function of this pilot system by formula (1)
Figure 755920DEST_PATH_IMAGE008
Figure 681150DEST_PATH_IMAGE010
（1）
In the formula:
Figure 843142DEST_PATH_IMAGE012
-white noise signal
Figure 842322DEST_PATH_IMAGE014
Autopower spectral density;
-white noise signal
Figure 476882DEST_PATH_IMAGE014
With the sensor response signal
Figure 504881DEST_PATH_IMAGE006
Between cross-spectral density;
Figure 624147DEST_PATH_IMAGE008
Frequency response function between-acceleration transducer and torque sensor and linear vibration exciter and the reverse vibration generator is 3 * 3 matrixes.
Expected Response signal during (4), with this gear actual travel
Figure 751503DEST_PATH_IMAGE002
Be simulated target, according to the initial driving signal of formula (2) and (3) calculated line vibrator and reverse vibration generator:
Figure 651326DEST_PATH_IMAGE018
（2）
Figure 155119DEST_PATH_IMAGE020
（3）
In the formula:
Figure 456788DEST_PATH_IMAGE022
- Inverse matrix;
Figure 76917DEST_PATH_IMAGE024
-Expected Response signal Fourier transform;
Figure 274998DEST_PATH_IMAGE028
-linear vibration exciter and reverse vibration generator initially drive signal;
Figure 72052DEST_PATH_IMAGE030
-
Figure 618571DEST_PATH_IMAGE028
Fourier transform.
(5), with initial drive linear vibration exciter and reverse vibration generator, gather simultaneously the response signal of acceleration transducer and torque sensor
Figure 729747DEST_PATH_IMAGE032
, calculate time domain response and frequency domain response weighted error with formula (4), (5), (6) and (7), use driving signal correction amount corresponding to formula (8) and (9) error of calculation:
Figure 740428DEST_PATH_IMAGE034
（4）
（5）
（6）
Figure 391486DEST_PATH_IMAGE040
（7）
Figure 194357DEST_PATH_IMAGE042
（8）
Figure 333215DEST_PATH_IMAGE044
（9）
In the formula: -time domain response error signal;
Figure 104042DEST_PATH_IMAGE048
-sensor response signal
Figure 29928DEST_PATH_IMAGE032
Fourier transform;
Figure 277370DEST_PATH_IMAGE050
-frequency domain response error signal;
Figure 348094DEST_PATH_IMAGE052
-frequency domain response error signal
Figure 339184DEST_PATH_IMAGE050
Inverse Fourier transform;
Figure 178964DEST_PATH_IMAGE054
-time domain response and frequency domain response weighted error;
-
Figure 827431DEST_PATH_IMAGE054
Fourier transform;
Figure 684528DEST_PATH_IMAGE058
The corresponding signal that drives of-error;
Figure 316498DEST_PATH_IMAGE060
-
Figure 968059DEST_PATH_IMAGE058
Fourier transform;
Revising the driving signal is
Figure 951059DEST_PATH_IMAGE062
In the formula
Figure 283951DEST_PATH_IMAGE064
Be attenuation coefficient, initial value gets 0.5 usually, suitably increases or reduces according to the iteration convergence situation, but must satisfy: 0＜
Figure 832744DEST_PATH_IMAGE064
≤ 1;
Drive signal to revise
Figure 855539DEST_PATH_IMAGE066
As driving, constantly repeat the process of front in this step and carry out iteration, and with the real-time error of calculation value of formula (10)
Figure 122572DEST_PATH_IMAGE068
, when each sensor response error≤5%, the final signal that drives of record, this finally drives the final driving signal that signal is this gear;
Figure 259156DEST_PATH_IMAGE070
（10）
In the formula: -the nInferior iteration error value;
Figure 859081DEST_PATH_IMAGE072
-the nThe response signal that inferior iteration gathers;
-
Figure 288106DEST_PATH_IMAGE072
Fourier transform.
(6), repeating step (4) and step (5), the Expected Response signal during to each gear actual travel of variator carries out simulative iteration, obtains the final driving signal of each gear.
(7), finally drive signal as input take each gear respectively, variator is fixed on corresponding gear, kinematic train is carried out the fatigue durability test.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (1)

1. the car transmissions tired test method of reproducing of load of travelling, it is characterized in that, adopted in the method a kind of car transmissions tired pilot system of reproducing of load of travelling, this pilot system comprises the first linear vibration exciter, the second linear vibration exciter, the first hold-down support, the second hold-down support, acceleration transducer, reverse vibration generator, torque sensor and computer control system; Described the first linear vibration exciter and the second linear vibration exciter vertically arrange, on the piston rod of the first linear vibration exciter and the second linear vibration exciter, a brace table is set respectively, each brace table is provided with the relative support slide unit of this brace table horizontal slip, described the first hold-down support vertically is fixed on the support slide unit of the first linear vibration exciter top, described the second hold-down support vertically is fixed on the support slide unit of the second linear vibration exciter top, be equipped with acceleration transducer on described the first hold-down support and the second hold-down support, described torque sensor is connected with reverse vibration generator, described the first linear vibration exciter, the second linear vibration exciter and reverse vibration generator are controlled by computer control system, the signal input computer control system that acceleration transducer and torque sensor gather;
The method comprises the steps:
(1), at transmission input shaft the strain-type torque sensor is installed, acceleration transducer is installed on the wheel hub, is gathered the vibration acceleration of gear-box input torque and output terminal at the testing field, and gather simultaneously the Transmission gear signal;
(2), according to gear signal, torque signal and the acceleration signal that gathers carried out cutting, rejects the singular term pre-service, the Expected Response signal when obtaining each gear actual travel, the Expected Response signal when recording this gear actual travel is , be 1 * 3 matrix;
(3), car transmissions are installed in car transmissions and travel that load is tired to be reproduced on the pilot system, reverse vibration generator is connected with the power input shaft of variator, the moving semiaxis of long pass of variator is fixedly connected with the first hold-down support, the moving semiaxis of the short pass of variator is fixedly connected with the second hold-down support, by computer control system linear vibration exciter and reverse vibration generator is applied white noise signal , the response signal of collecting acceleration transducer and torque sensor
Figure 2012105379015100001DEST_PATH_IMAGE006
, calculate the frequency response function of this pilot system by formula (1)
Figure 2012105379015100001DEST_PATH_IMAGE008
Figure 2012105379015100001DEST_PATH_IMAGE010
（1）
In the formula:
Figure 2012105379015100001DEST_PATH_IMAGE012
-white noise signal
Figure 2012105379015100001DEST_PATH_IMAGE014
Autopower spectral density;
Figure 2012105379015100001DEST_PATH_IMAGE016
-white noise signal
Figure 994976DEST_PATH_IMAGE014
With the sensor response signal Between cross-spectral density;
Figure 629537DEST_PATH_IMAGE008
Frequency response function between-acceleration transducer and torque sensor and linear vibration exciter and the reverse vibration generator is 3 * 3 matrixes;
Expected Response signal during (4), with this gear actual travel
Figure 962429DEST_PATH_IMAGE002
Be simulated target, according to the initial driving signal of formula (2) and (3) calculated line vibrator and reverse vibration generator:
（2）
Figure 2012105379015100001DEST_PATH_IMAGE020
（3）
In the formula:
Figure 2012105379015100001DEST_PATH_IMAGE022
-
Figure 589851DEST_PATH_IMAGE008
Inverse matrix;
Figure 2012105379015100001DEST_PATH_IMAGE024
-Expected Response signal Fourier transform;
-linear vibration exciter and reverse vibration generator initially drive signal;
-
Figure 228292DEST_PATH_IMAGE028
Fourier transform;
(5), with initial drive linear vibration exciter and reverse vibration generator, gather simultaneously the response signal of acceleration transducer and torque sensor
Figure DEST_PATH_IMAGE032
, calculate time domain response and frequency domain response weighted error with formula (4), (5), (6) and (7), use driving signal correction amount corresponding to formula (8) and (9) error of calculation:
Figure DEST_PATH_IMAGE034
（4）
Figure DEST_PATH_IMAGE036
（5）
Figure DEST_PATH_IMAGE038
（6）
Figure DEST_PATH_IMAGE040
（7）
Figure DEST_PATH_IMAGE042
（8）
Figure DEST_PATH_IMAGE044
（9）
In the formula:
Figure DEST_PATH_IMAGE046
-time domain response error signal;
-sensor response signal
Figure 56178DEST_PATH_IMAGE032
Fourier transform;
-frequency domain response error signal;
Figure DEST_PATH_IMAGE052
-frequency domain response error signal
Figure 68127DEST_PATH_IMAGE050
Inverse Fourier transform;
Figure DEST_PATH_IMAGE054
-time domain response and frequency domain response weighted error;
Figure DEST_PATH_IMAGE056
-
Figure 612372DEST_PATH_IMAGE054
Fourier transform;
Figure DEST_PATH_IMAGE058
The corresponding signal that drives of-error;
-
Figure 481102DEST_PATH_IMAGE058
Fourier transform;
Revising the driving signal is
In the formula Be attenuation coefficient, initial value gets 0.5 usually, suitably increases or reduces according to the iteration convergence situation, but must satisfy: 0＜ ≤ 1;
Drive signal to revise As driving, constantly repeat the process of front in this step and carry out iteration, and with the real-time error of calculation value of formula (10)
Figure DEST_PATH_IMAGE068
, when each sensor response error≤5%, the final signal that drives of record, this finally drives the final driving signal that signal is this gear;
Figure DEST_PATH_IMAGE070
（10）
In the formula:
Figure 675507DEST_PATH_IMAGE068
-the nInferior iteration error value;
Figure DEST_PATH_IMAGE072
-the nThe response signal that inferior iteration gathers;
Figure DEST_PATH_IMAGE074
- Fourier transform;
(6), repeating step (4) and step (5), the Expected Response signal during to each gear actual travel of variator carries out simulative iteration, obtains the final driving signal of each gear;
(7), finally drive signal as input take each gear respectively, variator is fixed on corresponding gear, kinematic train is carried out the fatigue durability test.
CN201210537901.5A 2012-12-13 2012-12-13 Driving load fatigue representing and testing method for transmission system of automobile Expired - Fee Related CN102944422B (en)

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CN106872129A (en) * 2016-12-23 2017-06-20 北汽福田汽车股份有限公司 One kind support class bracket assembly endurance test method and device
CN107884150A (en) * 2017-12-22 2018-04-06 中国地震局工程力学研究所 Shake table offline iteration control method based on flooring response spectra
CN108956157A (en) * 2018-07-10 2018-12-07 北京长城华冠汽车技术开发有限公司 automobile fatigue durability testing system and vehicle
CN109580247A (en) * 2018-11-29 2019-04-05 重庆凯瑞汽车试验设备开发有限公司 Vehicle movement simulation method, device and equipment
CN110168340A (en) * 2016-12-05 2019-08-23 Avl李斯特有限公司 For during carrying out transmission test by power train to the method that is controlled of load machine and testing stand
CN111272423A (en) * 2018-12-04 2020-06-12 郑州宇通客车股份有限公司 Speed reducer testing device
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