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CN102967458A - Three-freedom-degree vibration fatigue testing method for AMT (Automated Manual Transmission) execution mechanism - Google Patents

Three-freedom-degree vibration fatigue testing method for AMT (Automated Manual Transmission) execution mechanism Download PDF

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CN102967458A
CN102967458A CN201210494133XA CN201210494133A CN102967458A CN 102967458 A CN102967458 A CN 102967458A CN 201210494133X A CN201210494133X A CN 201210494133XA CN 201210494133 A CN201210494133 A CN 201210494133A CN 102967458 A CN102967458 A CN 102967458A
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amt
signal
hydraulic servo
response
servo linear
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CN102967458B (en
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邹喜红
石晓辉
张鹤
施全
张志刚
郝建军
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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 three-freedom-degree vibration fatigue testing method for an AMT (Automated Manual Transmission) execution mechanism. The testing method comprises the following steps of: 1, acquiring response signals and AMT shift signals of acceleration sensors during actual running of an automobile; 2, processing acceleration signals to obtain expected response signals, a shift frequency and a shift principle; 3, computing a frequency response function of a device; 4, computing an initial driving signal of a hydraulic servo linear vibrator; 5, computing driving signal corrections corresponding to errors, and recording a final driving signal when a response error is not more than 5%; and 6, performing shift by AMT according to the shift frequency and the shift principle figured out in the second step, and implementing a vibration fatigue test of the AMT execution mechanism with taking the final driving signal as input. The three-freedom-degree vibration fatigue testing method can be used for simulating the motion at three degrees of freedom of vertical displacement, sidesway and pitching of the AMT execution mechanism and a control system in the actual running, and thus the reliability of the AMT execution mechanism can be accurately and rapidly examined indoors.

Description

A kind of AMT topworks Three Degree Of Freedom vibration fatigue test method
Technical field
The present invention relates to a kind of electric control mechanical type automatic speed variator method for testing performance, relate in particular to a kind of AMT topworks Three Degree Of Freedom vibration fatigue test method.
Background technology
Electric control mechanical type automatic speed variator AMT(Automated Manual Transmission) become the focus that countries in the world automobile component part supply merchant and car load manufacturer competitively develop, and in succession released series of products in various vehicles, especially in wide market and development prospect is arranged in low discharge capacity car and the commercial car.Car AMT newly installs a cover electric control auto gearshift topworks (being called for short topworks) additional on original manual transmission, realize that MT is to the transformation of AMT.Because the existence of road excitation and these two large driving sources of engine luggine, the AMT topworks long-term work of newly installing additional is under violent vibration and impacting.Therefore, the vibrating fatigue reliability of AMT topworks has just become one of most important performance of AMT variator.At present, because the shortcoming of research technique and test method, AMT speed-changer executing mechanism fail-test mainly adopts actual road test and proving ground test, waste time and energy, and poor repeatability; Minority adopts conventional manual mechanical transmission Bench test methods, is difficult to the vibrating fatigue reliability of topworks is accurately verified.So far, also there is not AMT topworks indoor vibration Fatigue reliability testing method both at home and abroad.
Summary of the invention
For above shortcomings in the prior art, the invention provides a kind of AMT topworks Three Degree Of Freedom vibration fatigue test method based on the actual vibration loading spectrum.This test method can be simulated the motion of AMT topworks and perpendicular displacement, inclination and the pitching three degree of freedom of control system when actual travel, thereby indoor AMT topworks reliability is examined quickly and accurately.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of AMT topworks Three Degree Of Freedom vibration fatigue test method, adopted in the method a kind of AMT topworks Three Degree Of Freedom vibration fatigue test device, this test unit comprises that ground installs dull and stereotyped, AMT support plate and three hydraulic servo linear vibrators are installed; The bottom of three hydraulic servo linear vibrators and ground are installed the dull and stereotyped planar hinge that adopts and are connected, and three hydraulic servo linear vibrators and ground are installed on the circumference that dull and stereotyped tie point is distributed on ground installation flat board; The support plate of installing the top of three hydraulic servo linear vibrators and AMT adopts ball pivot to be connected, and three hydraulic servo linear vibrators are distributed on the circumference of AMT installation support plate with the tie point of AMT installation support plate;
The method comprises the steps:
(1), will speed up the device installation of sensors suspends and AMT body junction response signal and the AMT gear shifting signal of each acceleration transducer when proving ground gathers the automobile actual travel in the real vehicle installation;
(2), the acceleration signal that gathers is carried out filtering, rejects singular value and trend term pre-service, acquisition Expected Response signal
Figure 201210494133X100002DEST_PATH_IMAGE001
,
Figure 672216DEST_PATH_IMAGE001
It is 1 * 3 matrix; The AMT gear shifting signal that gathers is carried out statistical study, count gearshift number of times and the schedule of each gear in the fail-test process of testing field;
(3), the AMT body is installed in the top that AMT installs support plate by the AMT erection support, control each hydraulic servo linear vibrator by computer control system and export respectively white noise signal
Figure 5108DEST_PATH_IMAGE002
The excitation test unit, the response signal of collecting each acceleration transducer
Figure 201210494133X100002DEST_PATH_IMAGE003
, by the frequency response function of formula (1) calculation element
Figure 629600DEST_PATH_IMAGE004
Figure 201210494133X100002DEST_PATH_IMAGE005
（1）
In the formula:
Figure 576696DEST_PATH_IMAGE006
-white noise signal
Figure 201210494133X100002DEST_PATH_IMAGE007
Autopower spectral density;
Figure 781413DEST_PATH_IMAGE008
-white noise signal
Figure 668728DEST_PATH_IMAGE007
With the acceleration transducer response signal
Figure 275290DEST_PATH_IMAGE003
Between cross-spectral density;
Figure 455605DEST_PATH_IMAGE004
Frequency response function between-acceleration transducer and the hydraulic servo linear vibrator is 3 * 3 matrixes;
(4), with the expectation response signal Be simulated target, initially drive signal according to formula (2) and (3) calculating hydraulic servo linear vibrator:
Figure 201210494133X100002DEST_PATH_IMAGE009
（2）
（3）
In the formula:
Figure 201210494133X100002DEST_PATH_IMAGE011
- Inverse matrix;
Figure 647978DEST_PATH_IMAGE012
-Expected Response signal Fourier transform;
Figure 201210494133X100002DEST_PATH_IMAGE013
-hydraulic servo linear vibrator initially drives signal;
Figure 790826DEST_PATH_IMAGE014
-hydraulic servo linear vibrator initially drives signal
Figure 371980DEST_PATH_IMAGE013
Fourier transform;
(5), with initial drive hydraulic servo linear vibrator, gather simultaneously the response signal of each acceleration transducer
Figure 201210494133X100002DEST_PATH_IMAGE015
, calculate time domain response and frequency domain response average error with formula (4), (5), (6), (7), use driving signal correction amount corresponding to formula (8) and (9) error of calculation:
Figure 540703DEST_PATH_IMAGE016
（4）
Figure 201210494133X100002DEST_PATH_IMAGE017
（5）
Figure 207308DEST_PATH_IMAGE018
（6）
Figure 201210494133X100002DEST_PATH_IMAGE019
（7）
Figure 473073DEST_PATH_IMAGE020
（8）
（9）
In the formula:
Figure 597149DEST_PATH_IMAGE022
-time domain response error signal;
Figure 201210494133X100002DEST_PATH_IMAGE023
-
Figure 306479DEST_PATH_IMAGE015
Fourier transform;
Figure 257118DEST_PATH_IMAGE024
-frequency domain response error signal;
Figure 201210494133X100002DEST_PATH_IMAGE025
-frequency domain response error signal
Figure 264257DEST_PATH_IMAGE024
Inverse Fourier transform;
Figure 302227DEST_PATH_IMAGE026
-time domain response and frequency domain response average error;
Figure 201210494133X100002DEST_PATH_IMAGE027
-
Figure 182458DEST_PATH_IMAGE026
Fourier transform;
Figure 807343DEST_PATH_IMAGE028
The corresponding signal that drives of-error;
Figure 201210494133X100002DEST_PATH_IMAGE029
-
Figure 165643DEST_PATH_IMAGE028
Fourier transform;
Revising the driving signal is
Figure 326629DEST_PATH_IMAGE030
Drive signal to revise
Figure 201210494133X100002DEST_PATH_IMAGE031
As driving, constantly repeat the process of front and carry out iteration, and with the real-time error of calculation value of formula (10)
Figure 377761DEST_PATH_IMAGE032
, when each acceleration transducer response error≤5%, the final signal that drives of record;
Figure 201210494133X100002DEST_PATH_IMAGE033
（10）
In the formula:
Figure 489943DEST_PATH_IMAGE032
-the nInferior iteration error value;
Figure 651934DEST_PATH_IMAGE034
-the nThe response signal that inferior iteration gathers;
Figure 201210494133X100002DEST_PATH_IMAGE035
- Fourier transform;
(6), AMT shifts gears with (2) the gearshift number of times and the schedule that count of step, carries out the vibration fatigue test of AMT topworks take final driving signal as input simultaneously.
Compared with prior art, the present invention has following advantage:
1, this test method can be simulated the motion of AMT topworks and perpendicular displacement, inclination and the pitching three degree of freedom of control system when actual travel, thereby indoor AMT topworks reliability is examined quickly and accurately.
2, using planar hinge and ball pivot have carried out ingenious layout to the hydraulic servo linear vibrator, can stablize in hydraulic servo linear vibrator effective travel without the operation of interfering.
3, AMT and topworks thereof have adopted former car three-point suspension mounting means substantially in the installation of installing on the flat board, have well simulated the real vehicle situation.
4, by controller and time-frequency domain multi parameters control method, in indoor precise and high efficiency simulation AMT and Vibration Condition and the tired situation of topworks when real vehicle travels thereof.
Description of drawings
Fig. 1 is the front view of AMT topworks Three Degree Of Freedom vibration fatigue test device;
Fig. 2 is the vertical view of AMT topworks Three Degree Of Freedom vibration fatigue test device.
In the accompanying drawing: 1-ground is installed dull and stereotyped; 2-AMT installs support plate; 3-hydraulic servo linear vibrator; 4-planar hinge; 5-ball pivot; 6-real vehicle is installed and is suspended; 7-AMT body; 8-acceleration transducer; 9-AMT topworks; 10-AMT erection support.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
A kind of AMT topworks Three Degree Of Freedom vibration fatigue test method has adopted a kind of AMT topworks Three Degree Of Freedom vibration fatigue test device in the method.This AMT topworks Three Degree Of Freedom vibration fatigue test device comprises that ground is installed flat board 1, AMT installs support plate 2 and three hydraulic servo linear vibrators 3.The bottom of three hydraulic servo linear vibrators 3 and ground are installed dull and stereotyped 1 and are adopted planar hinge 4 to be connected, and three hydraulic servo linear vibrators 3 and ground are installed dull and stereotyped 1 tie point and be distributed on ground and install on the circumference of flat board 1.The top of three hydraulic servo linear vibrators 3 is installed support plate 2 with AMT and is adopted ball pivot 5 to be connected, and three hydraulic servo linear vibrators 3 are distributed on the circumference of AMT installation support plate 2 with the tie point that AMT installs support plate 2.
When hydraulic servo linear vibrator 3 produces different displacements, AMT installs support plate 2 will realize perpendicular displacement and both direction rotational freedom, just in time simulates vibration and the motion conditions of perpendicular displacement, inclination and the pitching three degree of freedom of AMT topworks 9 when actual travel.By calculating and analyzing, when three hydraulic servo linear vibrator 3 inclination angles were 70 ° of left and right sides, the scope of this device three degree of freedom obtained optimal utilization, and for this reason, the inclination angle of three hydraulic servo linear vibrators 3 is got 70 °.Better simulated for making AMT and AMT topworks Vibration Condition, the installation of AMT has adopted real vehicle to install to suspend 6 and damping element, by design AMT erection support 10 AMT and real vehicle thereof are installed to suspend and 6 be installed in together on the test unit, three acceleration transducers 8 are pasted and are installed in each real vehicle and install and suspend 6 and the AMT junction.This test unit is connected with a computer software control system.
This AMT topworks Three Degree Of Freedom vibration fatigue test method comprises the steps:
(1), will speed up device sensor 8 be installed in real vehicle install the 6(AMT body 7 that suspends install to suspend by real vehicle 6 be installed on the car body) with AMT body 7 junctions, response signal and the AMT gear shifting signal of each acceleration transducer when proving ground gathers the automobile actual travel.
(2), the acceleration signal that gathers is carried out filtering, rejects singular value and trend term pre-service, acquisition Expected Response signal ,
Figure 33477DEST_PATH_IMAGE001
It is 1 * 3 matrix; The AMT gear shifting signal that gathers is carried out statistical study, count gearshift number of times and the schedule of each gear in the fail-test process of testing field;
(3), the AMT topworks 9 on AMT body 7 and the AMT body 7 be installed in AMT by AMT erection support 10 install on the support plate 2, control each hydraulic servo linear vibrator 3 by computer control system and export respectively white noise signal
Figure 248427DEST_PATH_IMAGE002
The excitation test unit, the response signal of collecting each acceleration transducer
Figure 430009DEST_PATH_IMAGE003
, by the frequency response function of formula (1) calculation element
Figure 557365DEST_PATH_IMAGE004
Figure 145604DEST_PATH_IMAGE005
（1）
In the formula: -white noise signal
Figure 951066DEST_PATH_IMAGE007
Autopower spectral density;
Figure 311640DEST_PATH_IMAGE008
-white noise signal
Figure 885710DEST_PATH_IMAGE007
With the acceleration transducer response signal
Figure 193194DEST_PATH_IMAGE003
Between cross-spectral density;
Frequency response function between-acceleration transducer and the hydraulic servo linear vibrator is 3 * 3 matrixes;
(4), with the expectation response signal
Figure 566330DEST_PATH_IMAGE001
Be simulated target, initially drive signal according to formula (2) and (3) calculating hydraulic servo linear vibrator:
Figure 112849DEST_PATH_IMAGE009
（2）
Figure 286342DEST_PATH_IMAGE010
（3）
In the formula:
Figure 483974DEST_PATH_IMAGE011
-
Figure 389613DEST_PATH_IMAGE004
Inverse matrix;
Figure 485745DEST_PATH_IMAGE012
-Expected Response signal
Figure 885764DEST_PATH_IMAGE001
Fourier transform;
Figure 750952DEST_PATH_IMAGE013
-hydraulic servo linear vibrator initially drives signal;
Figure 827493DEST_PATH_IMAGE014
-hydraulic servo linear vibrator initially drives signal
Figure 597871DEST_PATH_IMAGE013
Fourier transform;
(5), with initial drive hydraulic servo linear vibrator, gather simultaneously the response signal of each acceleration transducer
Figure 847587DEST_PATH_IMAGE015
, calculate time domain response and frequency domain response average error with formula (4), (5), (6), (7), use driving signal correction amount corresponding to formula (8) and (9) error of calculation:
Figure 770544DEST_PATH_IMAGE016
（4）
Figure 765788DEST_PATH_IMAGE017
（5）
Figure 961146DEST_PATH_IMAGE018
（6）
Figure 14553DEST_PATH_IMAGE019
（7）
Figure 792016DEST_PATH_IMAGE020
（8）
Figure 272676DEST_PATH_IMAGE021
（9）
In the formula:
Figure 253532DEST_PATH_IMAGE022
-time domain response error signal;
Figure 48313DEST_PATH_IMAGE023
-
Figure 742600DEST_PATH_IMAGE015
Fourier transform;
Figure 581112DEST_PATH_IMAGE024
-frequency domain response error signal;
Figure 564111DEST_PATH_IMAGE025
-frequency domain response error signal Inverse Fourier transform;
-time domain response and frequency domain response average error;
Figure 219324DEST_PATH_IMAGE027
- Fourier transform;
Figure 872208DEST_PATH_IMAGE028
The corresponding signal that drives of-error;
Figure 213191DEST_PATH_IMAGE029
-
Figure 472134DEST_PATH_IMAGE028
Fourier transform;
Revising the driving signal is
Figure 914879DEST_PATH_IMAGE030
Drive signal to revise
Figure 651891DEST_PATH_IMAGE031
As driving, constantly repeat the process of front and carry out iteration, and with the real-time error of calculation value of formula (10)
Figure 112959DEST_PATH_IMAGE032
, when each acceleration transducer response error≤5%, the final signal that drives of record;
Figure 729754DEST_PATH_IMAGE033
（10）
In the formula:
Figure 705800DEST_PATH_IMAGE032
-the nInferior iteration error value;
Figure 184186DEST_PATH_IMAGE034
-the nInferior iteration gather response signal;
Figure 513143DEST_PATH_IMAGE035
-
Figure 848309DEST_PATH_IMAGE034
Fourier transform;
(6), AMT shifts gears with (2) the gearshift number of times and the schedule that count of step, carries out the vibration fatigue test of AMT topworks take final driving signal as input simultaneously.
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. AMT topworks Three Degree Of Freedom vibration fatigue test method, it is characterized in that, adopted in the method a kind of AMT topworks Three Degree Of Freedom vibration fatigue test device, this test unit comprises that ground installs dull and stereotyped, AMT support plate and three hydraulic servo linear vibrators are installed; The bottom of three hydraulic servo linear vibrators and ground are installed the dull and stereotyped planar hinge that adopts and are connected, and three hydraulic servo linear vibrators and ground are installed on the circumference that dull and stereotyped tie point is distributed on ground installation flat board; The support plate of installing the top of three hydraulic servo linear vibrators and AMT adopts ball pivot to be connected, and three hydraulic servo linear vibrators are distributed on the circumference of AMT installation support plate with the tie point of AMT installation support plate;
The method comprises the steps:
(1), will speed up the device installation of sensors suspends and AMT body junction response signal and the AMT gear shifting signal of each acceleration transducer when proving ground gathers the automobile actual travel in the real vehicle installation;
(2), the acceleration signal that gathers is carried out filtering, rejects singular value and trend term pre-service, acquisition Expected Response signal
Figure 201210494133X100001DEST_PATH_IMAGE001
,
Figure 446069DEST_PATH_IMAGE001
It is 1 * 3 matrix; The AMT gear shifting signal that gathers is carried out statistical study, count gearshift number of times and the schedule of each gear in the fail-test process of testing field;
(3), the AMT body is installed in the top that AMT installs support plate by the AMT erection support, control each hydraulic servo linear vibrator by computer control system and export respectively white noise signal
Figure 901321DEST_PATH_IMAGE002
The excitation test unit, the response signal of collecting each acceleration transducer
Figure 201210494133X100001DEST_PATH_IMAGE003
, by the frequency response function of formula (1) computing system
Figure 925778DEST_PATH_IMAGE004
（1）
In the formula: -white noise signal
Figure 201210494133X100001DEST_PATH_IMAGE007
Autopower spectral density;
Figure 154076DEST_PATH_IMAGE008
-white noise signal
Figure 717913DEST_PATH_IMAGE007
With the acceleration transducer response signal
Figure 839453DEST_PATH_IMAGE003
Between cross-spectral density;
Figure 396205DEST_PATH_IMAGE004
Frequency response function between-acceleration transducer and the hydraulic servo linear vibrator is 3 * 3 matrixes;
(4), with the expectation response signal Be simulated target, initially drive signal according to formula (2) and (3) calculating hydraulic servo linear vibrator:
Figure 201210494133X100001DEST_PATH_IMAGE009
（2）
Figure 972603DEST_PATH_IMAGE010
（3）
In the formula:
Figure DEST_PATH_IMAGE011
-
Figure 519122DEST_PATH_IMAGE004
Inverse matrix;
Figure 613986DEST_PATH_IMAGE012
-Expected Response signal
Figure 624667DEST_PATH_IMAGE001
Fourier transform;
Figure DEST_PATH_IMAGE013
-hydraulic servo linear vibrator initially drives signal;
Figure 218722DEST_PATH_IMAGE014
-hydraulic servo linear vibrator initially drives signal
Figure 314854DEST_PATH_IMAGE013
Fourier transform;
(5), with initial drive hydraulic servo linear vibrator, gather simultaneously the response signal of each acceleration transducer
Figure DEST_PATH_IMAGE015
, calculate time domain response and frequency domain response average error with formula (4), (5), (6), (7), use driving signal correction amount corresponding to formula (8) and (9) error of calculation:
Figure 964141DEST_PATH_IMAGE016
（4）
（5）
（6）
Figure DEST_PATH_IMAGE019
（7）
Figure 43885DEST_PATH_IMAGE020
（8）
Figure DEST_PATH_IMAGE021
（9）
In the formula:
Figure 299417DEST_PATH_IMAGE022
-time domain response error signal;
Figure DEST_PATH_IMAGE023
- Fourier transform;
Figure 924619DEST_PATH_IMAGE024
-frequency domain response error signal;
Figure DEST_PATH_IMAGE025
-frequency domain response error signal Inverse Fourier transform;
-time domain response and frequency domain response average error;
Figure DEST_PATH_IMAGE027
-
Figure 905979DEST_PATH_IMAGE026
Fourier transform;
Figure 683442DEST_PATH_IMAGE028
The corresponding signal that drives of-error;
- Fourier transform;
Revising the driving signal is
Figure 345291DEST_PATH_IMAGE030
Drive signal to revise
Figure DEST_PATH_IMAGE031
As driving, constantly repeat the process of front and carry out iteration, and with the real-time error of calculation value of formula (10)
Figure 123760DEST_PATH_IMAGE032
, when each acceleration transducer response error≤5%, the final signal that drives of record;
Figure DEST_PATH_IMAGE033
（10）
In the formula:
Figure 21309DEST_PATH_IMAGE032
-the nInferior iteration error value;
Figure 361286DEST_PATH_IMAGE034
-the nThe response signal that inferior iteration gathers;
Figure DEST_PATH_IMAGE035
-
Figure 78706DEST_PATH_IMAGE034
Fourier transform;
(6), AMT shifts gears with (2) the gearshift number of times and the schedule that count of step, carries out the vibration fatigue test of AMT topworks take final driving signal as input simultaneously.
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CN103645022A (en) * 2013-11-12 2014-03-19 陕西国力信息技术有限公司 AMT-system vibration function test method
CN103674457A (en) * 2013-11-12 2014-03-26 陕西国力信息技术有限公司 AMT system scanning frequency vibration endurance test method
CN107389480A (en) * 2017-08-31 2017-11-24 中国海洋大学 A kind of ocean compliant riser multiaxle fatigue experimental 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
CN109357831A (en) * 2018-11-30 2019-02-19 上海上汽马瑞利动力总成有限公司 A kind of heavy vehicle power assembly vibration tong
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CN114674548A (en) * 2022-05-30 2022-06-28 中国飞机强度研究所 Local vibration load applying system for airplane fatigue strength test and design method thereof

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CN103645022A (en) * 2013-11-12 2014-03-19 陕西国力信息技术有限公司 AMT-system vibration function test method
CN103674457A (en) * 2013-11-12 2014-03-26 陕西国力信息技术有限公司 AMT system scanning frequency vibration endurance test method
CN107389480A (en) * 2017-08-31 2017-11-24 中国海洋大学 A kind of ocean compliant riser multiaxle fatigue experimental 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
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CN111272423A (en) * 2018-12-04 2020-06-12 郑州宇通客车股份有限公司 Speed reducer testing device
CN114674548A (en) * 2022-05-30 2022-06-28 中国飞机强度研究所 Local vibration load applying system for airplane fatigue strength test and design method thereof
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