CN109752183A - A kind of speed changer percussion sensitivity test method - Google Patents
A kind of speed changer percussion sensitivity test method Download PDFInfo
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- CN109752183A CN109752183A CN201910044380.1A CN201910044380A CN109752183A CN 109752183 A CN109752183 A CN 109752183A CN 201910044380 A CN201910044380 A CN 201910044380A CN 109752183 A CN109752183 A CN 109752183A
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Abstract
The present invention relates to a kind of speed changers to tap sensitivity test method, to solve the problems, such as that test result caused by carrying out speed changer test under whole vehicle state is false.Comprising: install gear speed sensor, three-way vibration sensor and microphone on speed changer, mounts a transmission to and be placed on rack；The dynamometer machine controlled on rack is inputted according to transient test operating condition input condition to transmission power, and three-way vibration sensor is made to carry out vibration acceleration acquisition and microphone progress Noise Acquisition；Frequency spectrum map analysis is carried out to noise and vibration acceleration, determines rotating speed of target range when speed changer taps under different input torques；It controls the dynamometer machine on rack to input according to speed stabilizing measurement condition input condition to transmission power within the scope of rotating speed of target, gear speed sensor is made to carry out the acquisition of twisting vibration acceleration；Frequency spectrum map analysis is carried out to twisting vibration acceleration, determines percussion sensitivity of the speed changer under different igniting orders.
Description
Technical field
The present invention relates to noise and vibration measurement technical field, specifically a kind of speed changer taps sensitivity test method.
Background technique
With the continuous improvement that the reduction and people of engine noise require automobile sound quality, the noise of speed changer is asked
It inscribes increasingly significant.Transmission noise mainly includes uttering long and high-pitched sounds and tapping.Whistler test at present is highly developed, and taps and survey
Examination not yet forms a set of effective method for testing and analyzing.
One of test method tested in the prior art percussion is that test speed changer is defeated under whole vehicle state
Entering the twisting vibration acceleration of axis, this method is only capable of obtaining the twisting vibration acceleration of transmission input shaft under whole vehicle state,
Since vehicle is equipped with the component for vibration damping, in test, due to the interference of damping means, collected information can be made to lose
Very, so that the test result to speed changer is untrue.
Summary of the invention
The purpose of the present invention is to provide a kind of speed changer tap sensitivity test method, with solve under whole vehicle state into
The false problem of test result caused by row speed changer is tested.
The present invention provides a kind of speed changers to tap sensitivity test method, comprising:
It is punched at the position opposite with the radial direction of gear on speed changer to be tested, and installs and use at punching
In the gear speed sensor of detection twisting vibration acceleration；
Installation is for detecting the three-way vibration sensor of vibration acceleration on speed changer to be tested, and will be equipped with gear
The speed changer to be tested of velocity sensor and three-way vibration sensor is installed to being placed on the rack in semianechoic room, and in rack
Upper installation is used for the microphone of detected noise signal；
Dynamometer machine on control rack is inputted according to transient test operating condition input condition to transmission power to be tested, makes institute
It states three-way vibration sensor and carries out vibration acceleration acquisition and microphone progress Noise Acquisition；
Frequency spectrum map analysis is carried out to the collected noise of institute and vibration acceleration, determines speed changer to be tested in different inputs
Rotating speed of target range when being tapped under torque；
Control the dynamometer machine on rack within the scope of the rotating speed of target according to speed stabilizing measurement condition input condition to be measured
Transmission power input is tried, the gear speed sensor is made to carry out the acquisition of twisting vibration acceleration；
Frequency spectrum map analysis is carried out to the collected twisting vibration acceleration of institute, determines speed changer to be tested in different igniting ranks
Percussion sensitivity under secondary.
Preferably, the gear speed sensor installed on speed changer to be tested is multiple, multiple gear speed sensors
It is separately mounted at the input shaft gear of speed changer to be tested, at countershaft-gear, at Driven Gear of Final Reduction Gear and the sky of various gears
At sleeve gear；The three-way vibration sensor installed on speed changer to be tested be it is multiple, multiple three-way vibration sensors are pacified respectively
At right above the shell of speed changer to be tested, at left suspension installation point, at rear-suspending installation point and at front-suspension installation point；
The microphone installed on rack be it is multiple, multiple microphones are separately positioned in front of the enveloping surface center of speed changer to be tested
At 1m, at the 1m of at the rear 1m of enveloping surface center and enveloping surface center top.
Preferably, the transient test operating condition input condition are as follows: the gear of the control speed changer to be tested is in specific
The torque of dynamometer machine on gear, rack is maintained at specified torque, and the revolving speed for controlling the dynamometer machine is pressed in first time period
The second rotating speed of target is accelerated to from first object revolving speed according to specific rotation speeds changing value and specific vibration frequency range, then is controlled described
The revolving speed of dynamometer machine is in second time period according to specific rotation speeds changing value and specific vibration frequency range from second target
Revolving speed is decelerated to the first object revolving speed.
Preferably, the speed stabilizing measurement condition input condition are as follows: the control speed changer to be tested be in specific operation, to
The gear of test speed changer is in specific gear, the revolving speed of dynamometer machine on rack is maintained at specific rotation speeds, controls the measurement of power
The torque of machine is defeated from initial center change in torque to maximum according to the corresponding vibration frequency of engine order in special time period
Enter torque；
Wherein, in speed stabilizing measurement condition input condition, in identical transmission gear to be tested and identical dynamometer machine revolving speed
Under, different engine orders respectively correspond a vibration frequency, an initial center torque and a maximum input torque.
Preferably, frequency spectrum map analysis is carried out to the collected twisting vibration acceleration of institute, determines speed changer to be tested not
Include: with the step of percussion sensitivity lighted a fire under order
Frequency spectrum map analysis is carried out to the collected twisting vibration acceleration of institute, determines the input shaft of speed changer to be tested not
With the angular acceleration under igniting order；
Angular acceleration of the input shaft of speed changer to be tested under each igniting order is determined as speed changer to be tested to exist
Percussion sensitivity under the igniting order.
Preferably, the method also includes:
Frequency spectrum map analysis is carried out to the collected twisting vibration acceleration of institute, determines the jackshaft tooth of speed changer to be tested
Free gear at wheel, the Driven Gear of Final Reduction Gear and various gears corresponding angular acceleration under different igniting orders respectively；
Determine the empty set under each igniting order, at the countershaft-gear, the Driven Gear of Final Reduction Gear and various gears
Maximum one of target angular acceleration in the corresponding angular acceleration of gear；
The corresponding target gear of the target angular acceleration is determined as causing to tap under the igniting order main
Contribution amount.
The invention has the benefit that
Due to being that speed changer to be tested is individually carried out engine bench test, parameter information collected during the test can
With the interference not by the other components of vehicle, guarantee the accuracy of acquisition and test result.Meanwhile in the application, by
The parameter acquired under transient test operating condition input condition carries out frequency spectrum map analysis, opens and primarily determines that speed changer taps preliminary
The range of speeds carries out frequency spectrum map analysis in the parameter by acquiring under speed stabilizing measurement condition input condition, further accurate true
Make the specific moment for tapping and occurring, that is, cause the specific revolving speed and torque tapped.
Detailed description of the invention
Fig. 1 is that speed changer to be tested is assembled the block diagram on rack；
Fig. 2 is the flow chart of method of the invention.
Specific embodiment
The present invention provides a kind of speed changers to tap sensitivity test method, referring to Figures 1 and 2, comprising:
Step 1, it is punched at position opposite with the radial direction of gear on speed changer to be tested, and at punching
Gear speed sensor 3 for detecting twisting vibration acceleration is installed.
Specifically, speed changer to be tested can be manual transmission, and double-clutch speed changer etc. is used as test object, for example,
It chooses a maximum and is carried as the six-speed manual speed changer of 250Nm as test object.For manual transmission, it should tear open
Except clutch；For double-clutch speed changer, since it must realize gearshift function by clutch, in test,
Clutch is carried on the double-clutch speed changer.It is punched on the case of transmission 1 of speed changer to be tested, and in speed changer
Punching on shell 1 requires the radial direction of the axial face gear in hole.
For speed changer, percussion is occurred on the gear 2 of speed changer, specially speed change
On the non-bearing gear mesh of device gear 2, for example, at input shaft gear, at countershaft-gear, at Driven Gear of Final Reduction Gear and each gear
The free gear of position.Therefore, in order to be acquired to the twisting vibration acceleration at non-bearing gear, by the gear speed
Sensor 3 be designed as it is multiple, and multiple gear speed sensors 3 be separately mounted at the input shaft gear of speed changer to be tested,
At countershaft-gear, at Driven Gear of Final Reduction Gear and at the free gear of various gears.Multiple gear speed sensors 3 are separately connected use
In one of channel of the multichannel data acquisition system LMS of the acquisition collected data of sensor, multiple gear speeds are passed
16 to 24 totally 9 channels of the main connection multichannel data acquisition system LMS of sensor 3.
Step 2, the three-way vibration sensor 4 for detecting vibration acceleration is installed on speed changer to be tested, and will peace
Speed changer to be tested equipped with gear speed sensor 3 and three-way vibration sensor 4 is installed to the rack being placed in semianechoic room
On, and installation is used for the microphone 5 of detected noise signal on rack.
It include 3 motors on rack, a motor (dynamometer machine i.e. in the application) is turned round as input terminal for simulating
Turn vibrational excitation, other two motor is as output loading.The three-way vibration sensor 4 installed on speed changer to be tested is more
It is a, multiple three-way vibration sensors 4 be separately mounted to right above the shell of speed changer to be tested at, at left suspension installation point, after
It suspends at installation point and at front-suspension installation point, multiple three-way vibration sensors 4 are separately connected one of channel of LMS, more
4 to 15 totally 12 channels of the main connection multichannel data acquisition system LSM of a three-way vibration sensor 4；It is installed on rack
Microphone 5 be it is multiple, multiple microphones 5 are separately positioned in front of the enveloping surface center of speed changer to be tested at 1m, envelope
Above at the rear 1m of face center and enveloping surface center at 1m, multiple microphones 5 are separately connected for acquiring sensor acquisition
One of channel of the multichannel data acquisition system LMS of the data arrived, multiple microphones 5 mainly adopt by connection multi-channel data
Totally 3 channels of the 1 to 3 of collecting system LMS.
Step 3, the dynamometer machine controlled on rack is defeated to transmission power to be tested according to transient test operating condition input condition
Enter, the three-way vibration sensor is made to carry out vibration acceleration acquisition and microphone progress Noise Acquisition.
Specifically, the transient test operating condition input condition of the application specifically: the control speed changer to be tested is in
Specific operation, speed changer to be tested gear be in specific gear, the torque of dynamometer machine on rack is maintained at specified torque, control
Make the revolving speed of the dynamometer machine in first time period according to specific rotation speeds changing value and specific vibration frequency range from the first mesh
Mark revolving speed accelerates to the second rotating speed of target, then controls the revolving speed of the dynamometer machine and change in second time period according to specific rotation speeds
Value and specific vibration frequency range are decelerated to the first object revolving speed from second rotating speed of target.Referring to shown in the following table 1,
In following table, specific operation is accelerating mode or coasting mode, and first object revolving speed is 1000rpm, and the second rotating speed of target is
2000rpm, first time period 30s, second time period 40s, specific rotation speeds changing value are 50rpm, specific vibration frequency model
It encloses for 34-67Hz.Wherein, when the gear of speed changer to be tested is in 1 gear, the dynamometer torque on rack be maintained at 50Nm or
100Nm.When the gear of speed changer to be tested is in 2 gear, the dynamometer torque on rack is maintained at 60Nm or 120Nm.To
When testing the gear of speed changer and being in one of gear in 3 to 6 gears, the torque of the dynamometer machine on rack be maintained at 68Nm or
135Nm。
Table 1
Step 4, frequency spectrum map analysis is carried out to the collected noise of institute and vibration acceleration, determines speed changer to be tested not
With rotating speed of target range when being tapped under input torque.
The collected information in each channel is sent to computer by LMS, and computer carries out spectrogram by spectrogram software
Analysis, according to the distribution of color on the spectrogram of acquisition, to determine above-mentioned rotating speed of target range.
In conjunction with table 1 as can be seen that rotating speed of target range should be located at 1000rpm to a range between 2000rpm.It is logical
The mode for crossing transient test operating condition input condition is tested, to realize the specified torque and its right for determining and speed changer being caused to tap
The range of speeds answered.Transient test operating condition is motivated for simulated engine.
The determination of step 4 can determine the initial speed range for causing to tap.
Step 5, the dynamometer machine on rack is controlled within the scope of the rotating speed of target according to speed stabilizing measurement condition input condition
It is inputted to transmission power to be tested, the gear speed sensor 3 is made to carry out the acquisition of twisting vibration acceleration.
Specifically, in this application, the speed stabilizing measurement condition input condition are as follows: the gear of the control speed changer to be tested
The revolving speed of dynamometer machine of the position in specific gear, on rack is maintained at specific rotation speeds, controls the torque of the dynamometer machine specific
According to the corresponding vibration frequency of engine order from initial center change in torque to maximum input torque in period；Wherein, exist
In speed stabilizing measurement condition input condition, under identical transmission gear to be tested and identical dynamometer machine revolving speed, different engine ranks
It is secondary to respectively correspond a vibration frequency, an initial center torque and a maximum input torque.Speed stabilizing measurement condition is for setting
Determine speed changer and taps sensitivity target.If the gear of table 2 to 4, the corresponding speed changer to be tested of table 2 is 1 gear, the correspondence of table 3 is to be tested
The gear of speed changer is 2 gears, and the gear of the corresponding speed changer to be tested of table 3 to 6 is 3 to 6 gears.It is from table 2 to 4 it was determined that not
With under engine ignition order, corresponding vibration frequency is different, for example, light a fire under order in table 2 in 1 rank of simulated engine,
Corresponding vibration frequency is 17Hz, and corresponding initial center torque is 50Nm, and maximum input torque is 200Nm；Start in simulation
1.5 rank of machine is lighted a fire under order, and corresponding vibration frequency is 26Hz, and corresponding initial center torque is 100Nm, maximum input torque
For 200Nm.Also, under same gear, the corresponding maximum input torque of different rotating speeds is identical, in table 2, corresponding maximum
Input torque is 200Nm.
Table 1
Table 2
Table 3
Step 6, frequency spectrum map analysis is carried out to the collected twisting vibration acceleration of institute, determines speed changer to be tested in difference
The percussion sensitivity lighted a fire under order.
Specifically, step 6 includes:
Frequency spectrum map analysis is carried out to the collected twisting vibration acceleration of institute, determines the input shaft of speed changer to be tested not
With the angular acceleration under igniting order；
Angular acceleration of the input shaft of speed changer to be tested under each igniting order is determined as speed changer to be tested to exist
Percussion sensitivity under the igniting order.
The above method through the invention, due to being that speed changer to be tested is individually carried out engine bench test, in test process
In parameter information collected, can not by the interference of the other components of vehicle, guarantee acquisition and test result accuracy.
Meanwhile in the application, frequency spectrum map analysis is carried out by the parameter acquired under transient test operating condition input condition, and primarily determine
The preliminary range of speeds that speed changer taps, then the parameter by acquiring under speed stabilizing measurement condition input condition carry out frequency spectrum
Map analysis is further accurately determined to tap the specific moment occurred, that is, cause the specific revolving speed and torque tapped.
Preferably, the method also includes:
Step 7, frequency spectrum map analysis is carried out to the collected twisting vibration acceleration of institute, determines the centre of speed changer to be tested
Free gear at shaft gear, the Driven Gear of Final Reduction Gear and various gears corresponding angular acceleration under different igniting orders respectively；
Step 8, it determines under each igniting order, at the countershaft-gear, the Driven Gear of Final Reduction Gear and various gears
The corresponding angular acceleration of free gear in maximum one of target angular acceleration；
Step 9, the corresponding target gear of the target angular acceleration is determined as causing to tap under the igniting order
Main contributions amount.
Wherein, for step 7 to 9 it was determined that in the non-bearing gear of speed changer, the gear at which, which is only, causes speed changer
The main reason for percussion, and then can quickly be rectified and improved.
Meanwhile the method that the application is above-mentioned, performance comparison can also be carried out to the speed changer to be tested of multiple and different models,
Step 1 is successively carried out to 7 by the speed changer to be tested to multiple and different models, can determine the speed changer of any model
Least it is easy to happen percussion.
Claims (6)
1. a kind of speed changer taps sensitivity test method characterized by comprising
It is punched at the position opposite with the radial direction of gear on speed changer to be tested, and is installed at punching for examining
Survey the gear speed sensor of twisting vibration acceleration；
Installation is for detecting the three-way vibration sensor of vibration acceleration on speed changer to be tested, and will be equipped with gear speed
The speed changer to be tested of sensor and three-way vibration sensor is installed to being placed on the rack in semianechoic room, and is pacified on rack
Dress is used for the microphone of detected noise signal；
Dynamometer machine on control rack is inputted according to transient test operating condition input condition to transmission power to be tested, makes described three
Vibration acceleration acquisition is carried out to vibrating sensor and the microphone carries out Noise Acquisition；
Frequency spectrum map analysis is carried out to the collected noise of institute and vibration acceleration, determines speed changer to be tested in different input torques
Lower rotating speed of target range when tapping；
Control the dynamometer machine on rack within the scope of the rotating speed of target according to speed stabilizing measurement condition input condition to change to be tested
Fast device power input, makes the gear speed sensor carry out the acquisition of twisting vibration acceleration；
Frequency spectrum map analysis is carried out to the collected twisting vibration acceleration of institute, determines speed changer to be tested under different igniting orders
Percussion sensitivity.
2. speed changer according to claim 1 taps sensitivity test method, which is characterized in that on speed changer to be tested
The gear speed sensor of installation be it is multiple, multiple gear speed sensors are separately mounted to the input shaft tooth of speed changer to be tested
At wheel, at countershaft-gear, at Driven Gear of Final Reduction Gear and at the free gear of various gears；Three installed on speed changer to be tested
Be to vibrating sensor it is multiple, multiple three-way vibration sensors are separately mounted to place right above the shell of speed changer to be tested, a left side
It suspends at installation point, at rear-suspending installation point and at front-suspension installation point；The microphone installed on rack is multiple, Duo Gemai
Gram wind is separately positioned in front of the enveloping surface center of speed changer to be tested at 1m, at the rear 1m of enveloping surface center and enveloping surface
Above center at 1m.
3. speed changer according to claim 1 or 2 taps sensitivity test method, which is characterized in that the transient test
Operating condition input condition are as follows: the control speed changer to be tested is in specific operation, the gear of speed changer to be tested is in specific gear
Position, dynamometer machine on rack torque be maintained at specified torque, control the revolving speed of the dynamometer machine in first time period according to
Specific rotation speeds changing value and specific vibration frequency range accelerate to the second rotating speed of target from first object revolving speed, then control the survey
The revolving speed of function machine turns according to specific rotation speeds changing value and specific vibration frequency range from second target in second time period
Speed is decelerated to the first object revolving speed.
4. speed changer according to claim 3 taps sensitivity test method, which is characterized in that the speed stabilizing measurement condition
Input condition are as follows: the gear of the control speed changer to be tested is in specific gear, the revolving speed of dynamometer machine on rack is maintained at
Specific rotation speeds, control the torque of the dynamometer machine in special time period according to the corresponding vibration frequency of engine order from initial
Center torque is changed to maximum input torque；
Wherein, in speed stabilizing measurement condition input condition, under identical transmission gear to be tested and identical dynamometer machine revolving speed, no
A vibration frequency, an initial center torque and a maximum input torque are respectively corresponded with engine order.
5. speed changer according to claim 4 taps sensitivity test method, which is characterized in that the collected torsion of institute
The step of vibration acceleration carries out frequency spectrum map analysis, determines percussion sensitivity of the speed changer to be tested under different igniting orders packet
It includes:
Frequency spectrum map analysis is carried out to the collected twisting vibration acceleration of institute, determines the input shaft of speed changer to be tested in difference
Angular acceleration under fiery order；
Angular acceleration of the input shaft of speed changer to be tested under each igniting order is determined as speed changer to be tested described
The percussion sensitivity lighted a fire under order.
6. speed changer according to claim 5 taps sensitivity test method, which is characterized in that the method also includes:
Frequency spectrum map analysis is carried out to the collected twisting vibration acceleration of institute, determines countershaft-gear, the master of speed changer to be tested
Free gear at the reducer gear and various gears corresponding angular acceleration under different igniting orders respectively；
Determine the free gear under each igniting order, at the countershaft-gear, the Driven Gear of Final Reduction Gear and various gears
Maximum one of target angular acceleration in corresponding angular acceleration；
The corresponding target gear of the target angular acceleration is determined as to cause the main contributions tapped under the igniting order
Amount.
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| CN110231170A (en) * | 2019-06-04 | 2019-09-13 | 中汽研（天津）汽车工程研究院有限公司 | A kind of test method of speed changer impact noise |
| CN110231170B (en) * | 2019-06-04 | 2021-03-19 | 中汽研（天津）汽车工程研究院有限公司 | Testing method for transmission impact noise |
| CN113468662A (en) * | 2021-06-25 | 2021-10-01 | 重庆长安汽车股份有限公司 | Method for evaluating knocking level of transmission gear by adopting knocking index curved surface |
| CN113468662B (en) * | 2021-06-25 | 2022-06-03 | 重庆长安汽车股份有限公司 | Method for evaluating knocking level of transmission gear by adopting knocking index curved surface |
| CN113640003A (en) * | 2021-08-12 | 2021-11-12 | 哈尔滨东安汽车动力股份有限公司 | Method for measuring PCV valve knocking abnormal sound on engine test bed |
| CN113640003B (en) * | 2021-08-12 | 2023-05-30 | 哈尔滨东安汽车动力股份有限公司 | Method for measuring knocking abnormal sound of PCV valve on engine test bed |
| CN116341123A (en) * | 2023-05-30 | 2023-06-27 | 麦格纳动力总成(江西)有限公司 | Method and system for optimizing knocking noise of automobile gearbox |
| CN116341123B (en) * | 2023-05-30 | 2023-08-11 | 麦格纳动力总成(江西)有限公司 | Method and system for optimizing knocking noise of automobile gearbox |
| CN116793667A (en) * | 2023-08-18 | 2023-09-22 | 麦格纳动力总成(江西)有限公司 | Transmission gear meshing state detection method and detection device |
| CN116793667B (en) * | 2023-08-18 | 2024-02-20 | 麦格纳动力总成(江西)有限公司 | Transmission gear meshing state detection method and detection device |
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