A monitoring method and device for clutch sliding friction durability test process

Abstract

The embodiment of the present invention discloses a method and device for monitoring the clutch slip durability test process. The method includes: determining at least one initial test parameter, and starting the clutch slip durability test operation based on each initial test parameter; determining the actual test parameters of the clutch slip durability test according to a preset period; the actual test parameters are generated during the clutch slip durability test; the actual test parameters include at least one of the actual torque, actual slip power, actual slip work and actual slip time; if it is determined that the actual test parameter is greater than the preset parameter, the clutch slip durability test operation is terminated. By executing the technical solution provided by the embodiment of the present invention, it is possible to monitor the test process of the clutch slip durability bench test in real time, diagnose the test process from multiple dimensions, ensure the safety of the clutch during the test, reduce losses, and improve test efficiency and test quality.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of automobile transmission systems, and in particular to a monitoring method and device for a clutch slip and friction durability test process. Background Art

[0002] The clutch slip durability bench test is an important test in the verification of the clutch assembly. The general practice is to control the clutch input speed and output speed to produce a certain speed difference. At this time, the clutch control parameters are given to make the clutch engage and obtain a certain torque to cause the clutch to slip. After a certain period of time, the clutch is disconnected. This is repeated a certain number of times to achieve the purpose of assessing the reliability of the clutch.

[0003] The clutch slip durability bench test in the related art belongs to open-loop control, and there is a risk of clutch burning due to excessive clutch slip torque or excessive slip time due to software failure or human error. Summary of the invention

[0004] The embodiments of the present invention provide a method and device for monitoring a clutch slip resistance test process, which can realize real-time monitoring of the test process of a clutch slip resistance bench test, diagnose the test process from multiple dimensions, ensure the safety of the clutch during the test, reduce losses, and improve test efficiency and test quality.

[0005] In a first aspect, an embodiment of the present invention provides a method for monitoring a clutch slip durability test process, the method comprising:

[0006] Determining at least one initial test parameter, and starting the clutch slip durability test operation based on each of the initial test parameters;

[0007] Determine the actual test parameters of the clutch slip durability test according to a preset period; the actual test parameters are generated during the clutch slip durability test; the actual test parameters include at least one of actual torque, actual slip power, actual slip work and actual slip time;

[0008] If it is determined that the actual test parameter is greater than the preset parameter, the clutch slip endurance test operation is terminated.

[0009] In a second aspect, an embodiment of the present invention further provides a monitoring device for a clutch slip and friction durability test process, the device comprising: a clutch slip and friction durability test operation starting module, used to determine at least one initial test parameter, and start the clutch slip and friction durability test operation based on each of the initial test parameters;

[0010] an actual test parameter determination module, used to determine the actual test parameters of the clutch slip endurance test according to a preset period; the actual test parameters are generated during the clutch slip endurance test; the actual test parameters include at least one of actual torque, actual slip power, actual slip work and actual slip time;

[0011] The judgment module is used to terminate the clutch slip durability test operation if it is determined that the actual test parameter is greater than the preset parameter.

[0012] In a third aspect, an embodiment of the present invention further provides an electronic device, the device comprising:

[0013] one or more processors;

[0014] a storage device for storing one or more programs,

[0015] When the one or more programs are executed by the one or more processors, the one or more processors implement the method for monitoring the clutch slip durability test process as described in any one of the embodiments of the present invention.

[0016] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for monitoring a clutch slip durability test process as described in any one of the embodiments of the present invention.

[0017] The technical solution provided by the embodiment of the present invention determines at least one initial test parameter, and starts the clutch slip durability test operation based on each initial test parameter; determines the actual test parameters of the clutch slip durability test according to a preset period; the actual test parameters are generated during the clutch slip durability test; the actual test parameters include at least one of the actual torque, actual slip power, actual slip work and actual slip time; if it is determined that the actual test parameter is greater than the preset parameter, the clutch slip durability test operation is terminated. By executing the technical solution provided by the embodiment of the present invention, the test process of the clutch slip durability bench test can be monitored in real time, the test process can be diagnosed from multiple dimensions, the safety of the clutch during the test can be ensured, losses can be reduced, and the test efficiency and test quality can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a flow chart of a method for monitoring a clutch slippage durability test process provided by an embodiment of the present invention;

[0019] Figure 2 It is a flow chart of another method for monitoring a clutch slip durability test process provided by an embodiment of the present invention;

[0020] Figure 3It is a schematic diagram of the structure of a monitoring device for a clutch sliding friction durability test process provided by an embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0023] Figure 1 This is a flow chart of a method for monitoring a clutch friction durability test process provided by an embodiment of the present invention. The method can be executed by a monitoring device for a clutch friction durability test process. The device can be implemented by software and / or hardware. The device can be configured in an electronic device for monitoring a clutch friction durability test process. The method is applied to the scenario of diagnosing a clutch friction durability test process. Figure 1 As shown, the technical solution provided by the embodiment of the present invention specifically includes:

[0024] S110: Determine at least one initial test parameter, and start the clutch slip durability test operation based on each of the initial test parameters.

[0025] Specifically, the initial test parameter may be at least one of the initial input motor speed, the initial output motor speed, the initial slip time, the initial slip times, the initial torque, the initial slip power and the initial slip work. The initial test parameters may be set according to actual needs. This solution may determine at least one initial test parameter before starting each clutch slip endurance test operation, and start the clutch slip endurance test operation based on each initial test parameter. Specifically, this solution may generate an expected speed difference through the initial input motor speed at the test bench input end and the initial output motor speed at the test bench output end. The clutch pressure is determined by the initial torque and the torque-clutch pressure correspondence curve, the clutch pressure is controlled, the clutch is caused to slip, and the actual test parameters are generated.

[0026] S120: Determine actual test parameters of the clutch slip durability test according to a preset period.

[0027] Wherein, the actual test parameter is generated during the clutch slip endurance test; the actual test parameter includes at least one of actual torque, actual slip power, actual slip work and actual slip time.

[0028] Specifically, the preset period can be 10ms, and the preset period can also be 15ms. The preset period can be set according to actual needs. After starting the clutch slip durability test operation, the actual test parameters will be generated in real time during the clutch slip durability test. The actual test parameters of the clutch slip durability test can be determined according to the preset period. For example, the actual test parameters of the clutch slip durability test are determined at a frequency of 100Hz. The actual test parameter can be at least one of the actual torque, the actual slip power, the actual slip work and the actual slip time. The actual test parameter can also be the actual input motor speed. The actual test parameter can also be the actual output motor speed. The actual test parameter can be set according to actual needs. Among them, the actual slip power at a certain moment is determined by the actual input motor speed, the actual output motor speed and the actual torque at that moment. Actual slip power = (actual input motor speed-actual output motor speed) × actual torque / 9550. The actual slip work at a certain moment is determined by all the actual slip powers and sampling frequency of this clutch slip durability test before that moment. The actual friction power is the value obtained by dividing the accumulated value of all actual friction powers by the sampling frequency.

[0029] S130: If it is determined that the actual test parameter is greater than the preset parameter, the clutch slip endurance test operation is terminated.

[0030] Among them, the preset parameter can be a preset torque. The preset parameter can also be a preset sliding power. The preset parameter can also be a preset sliding work. The preset parameter can also be a preset sliding time. The preset parameter can be set according to actual needs. If the scheme determines that the actual test parameter is greater than the preset parameter, the clutch sliding endurance test operation can be terminated. For example, the clutch pressure is controlled to drop to zero to disengage the clutch. After the clutch is disengaged, the motor speed is controlled to drop to zero, and the control frame is shut down. Avoid the actual test parameter being too large to cause clutch burning.

[0031] In this embodiment, optionally, if it is determined that the actual test parameter is greater than the preset parameter, the clutch slip endurance test operation is terminated, including: if it is determined that the actual torque is greater than the preset torque, the clutch slip endurance test operation is terminated; or, if it is determined that the actual slip power is greater than the preset slip power, the clutch slip endurance test operation is terminated; or, if it is determined that the actual slip work is greater than the preset slip work, the clutch slip endurance test operation is terminated; or, if it is determined that the actual slip time is greater than the preset slip time, the clutch slip endurance test operation is terminated.

[0032] Among them, the preset torque, preset sliding power, preset sliding work and preset sliding time can be determined according to actual needs. In this scheme, when it is determined that the actual torque is greater than the preset torque, or when it is determined that the actual sliding power is greater than the preset sliding power, or when it is determined that the actual sliding work is greater than the preset sliding work, or when it is determined that the actual sliding time is greater than the preset sliding time, the clutch sliding endurance test operation will be terminated. That is, the clutch pressure is controlled to drop to zero to disengage the clutch. After the clutch is disengaged, the motor speed is controlled to drop to zero, and the control rack is shut down.

[0033] Therefore, if it is determined that the actual torque is greater than the preset torque, or if it is determined that the actual slip power is greater than the preset slip power, or if it is determined that the actual slip work is greater than the preset slip work, or if it is determined that the actual slip time is greater than the preset slip time, the clutch slip endurance test operation is terminated. The process of the clutch slip endurance test operation can be monitored from multiple dimensions to avoid clutch ablation caused by too large actual test parameters. Unnecessary losses can be reduced, thereby helping to improve test efficiency.

[0034] The technical solution provided by the embodiment of the present invention determines at least one initial test parameter, and starts the clutch slip durability test operation based on each initial test parameter; determines the actual test parameters of the clutch slip durability test according to a preset period; the actual test parameters are generated during the clutch slip durability test; the actual test parameters include at least one of the actual torque, actual slip power, actual slip work and actual slip time; if it is determined that the actual test parameter is greater than the preset parameter, the clutch slip durability test operation is terminated. By executing the technical solution provided by the embodiment of the present invention, the test process of the clutch slip durability bench test can be monitored in real time, the test process can be diagnosed from multiple dimensions, the safety of the clutch during the test can be ensured, losses can be reduced, and the test efficiency and test quality can be improved.

[0035] Figure 2 1 is a flow chart of a method for monitoring a clutch slip durability test process provided by an embodiment of the present invention. This embodiment is optimized on the basis of the above embodiment. Figure 2 As shown, the monitoring method of the clutch slip durability test process in the embodiment of the present invention may include:

[0036] S210: Determine at least one initial test parameter, and start the clutch slip endurance test operation based on each of the initial test parameters.

[0037] The initial test parameters include the initial sliding time and the initial sliding times.

[0038] For example, the current initial slip time may be a preset duration of the current clutch slip endurance test. The initial slip times may be a preset operation times of the clutch slip endurance test.

[0039] In this embodiment, optionally, the initial test parameters include the initial torque of this time; determining at least one initial test parameter includes: determining the effective slip interval of the previous clutch slip endurance test operation, and determining the average torque of the effective slip interval; the effective slip interval is the time interval during the previous clutch slip endurance test operation when the actual torque is greater than half of the previous initial torque; determining the initial torque of this time based on the average torque and the previous initial torque.

[0040] Among them, the previous initial torque may be the initial torque of the previous clutch slip endurance test. The current initial torque may be the initial torque of the current clutch slip endurance test. This scheme can determine the actual torque during the operation of the previous clutch slip endurance test according to a preset period, and determine the time interval in which the actual torque is greater than half of the previous initial torque, which is the effective slip interval. Then determine the average torque of the effective slip interval. Determine the current initial torque based on the relationship between the absolute value of the difference between the average torque and the previous initial torque in the effective slip interval and the torque compensation threshold.

[0041] Therefore, by determining the effective slip range of the previous clutch slip endurance test operation and the average torque of the effective slip range, and determining the initial torque of this time according to the average torque and the previous initial torque, it is possible to adaptively adjust the initial torque of each clutch slip endurance test, realize closed-loop control, improve test accuracy, and ensure that the slip torque can meet the expected requirements during the entire endurance test.

[0042] In a feasible embodiment, optionally, the initial torque for this time is determined based on the average torque and the previous initial torque, including: if it is determined that the absolute value of the difference between the average torque and the previous initial torque is greater than or equal to a torque compensation threshold, then the sum of the average value of the difference between the previous initial torque and the average torque and the previous initial torque is used as the initial torque for this time; or, if it is determined that the absolute value of the difference between the average torque and the previous initial torque is less than the torque compensation threshold, then the previous initial torque is used as the initial torque for this time.

[0043] Among them, the torque compensation threshold T offset It can be set according to actual needs. The average torque is recorded as T avg , the previous initial torque is recorded as T 0 , this initial torque is recorded as T 1 The average torque T avg With the previous initial torque T0 For comparison, when |T 0 -T avg |≥T offset When , the initial torque is corrected, and the initial torque T 1 =T 0 +(T 0 -T avg ) / 2; when |T 0 -T avg | <T offset When the initial torque is not corrected, the initial torque T 1 =T 0 .

[0044] Therefore, if it is determined that the absolute value of the difference between the average torque and the previous initial torque is greater than or equal to the torque compensation threshold, the sum of the average value of the difference between the previous initial torque and the average torque and the previous initial torque is used as the current initial torque; or if it is determined that the absolute value of the difference between the average torque and the previous initial torque is less than the torque compensation threshold, the previous initial torque is used as the current initial torque. The initial torque of each clutch slip endurance test can be adaptively adjusted, closed-loop control can be achieved, test accuracy can be improved, and it can be ensured that the slip torque can meet the expected requirements during the entire endurance test.

[0045] In another feasible embodiment, optionally, the initial test parameters include the initial friction work of this time; determining at least one initial test parameter includes: determining at least one effective torque within the effective friction interval; the effective torque is the sum of an average value of the difference between the previous initial torque and the average torque and an actual torque; determining the effective friction work within the effective friction interval based on each effective torque; determining the initial friction work of this time based on the effective friction work and the previous initial friction work.

[0046] The previous initial friction work may be the initial friction work of the previous clutch friction endurance test. The current initial friction work may be the initial friction work of the current clutch friction endurance test. The actual torque in the effective friction range is denoted as T real The average torque is denoted as T avg , the previous initial torque is recorded as T 0 The effective sliding friction work in the effective sliding friction range is recorded as W total The effective torque in the effective sliding friction range is T real +(T 0 -T avg) / 2. The actual sliding power at a certain moment is determined by the actual input motor speed, actual output motor speed and actual torque at that moment. Actual sliding power = (actual input motor speed - actual output motor speed) × actual torque / 9550. The actual sliding power at a certain moment is determined by all the actual sliding powers and sampling frequency of this clutch sliding endurance test before that moment. That is, W total The actual friction power in the effective friction interval is divided by the sampling frequency. The actual friction work is the value obtained by dividing the accumulated value of all actual friction powers by the sampling frequency. Then, the initial friction work is determined based on the relationship between the effective friction work and the previous initial friction work.

[0047] Therefore, by determining at least one effective torque in the effective sliding friction interval; determining the effective sliding friction work in the effective sliding friction interval according to each effective torque; and determining the current initial sliding friction work according to the effective sliding friction work and the previous initial sliding friction work, it is possible to adaptively adjust the initial sliding friction work of each clutch sliding friction endurance test, realize closed-loop control, improve test accuracy, and ensure that the sliding friction function meets the expected requirements during the entire endurance test.

[0048] In another feasible implementation, optionally, determining the initial sliding work of this time according to the effective sliding work and the previous initial sliding work includes: if it is determined that the absolute value of the difference between the effective sliding work and the previous initial sliding work is greater than or equal to a sliding work compensation threshold, then taking the sum of an average value of the difference between the previous initial sliding work and the effective sliding work and the previous initial sliding work as the initial sliding work of this time; or, if it is determined that the absolute value of the difference between the effective sliding work and the previous initial sliding work is less than the sliding work compensation threshold, then taking the previous initial sliding work as the initial sliding work of this time.

[0049] Exemplarily, the sliding friction compensation threshold W offset It can be set according to actual needs. The previous initial sliding friction work is recorded as W 0 , the initial friction work is recorded as W 1 . The effective friction work W total The initial friction work W 0 For comparison, when |W 0 -W total |≥W offset When , the initial friction work is corrected, and the initial friction work W 1 =W 0 +(W 0 -W total ) / 2; when |W 0 -W total | <W offset When the initial sliding friction work is not corrected, W1 =W 0 .

[0050] Therefore, if it is determined that the absolute value of the difference between the effective sliding friction work and the previous initial sliding friction work is greater than or equal to the sliding friction work compensation threshold, the sum of the average value of the difference between the previous initial sliding friction work and the effective sliding friction work and the previous initial sliding friction work is used as the current initial sliding friction work; or if it is determined that the absolute value of the difference between the effective sliding friction work and the previous initial sliding friction work is less than the sliding friction work compensation threshold, the previous initial sliding friction work is used as the current initial sliding friction work. The initial sliding friction work of each clutch sliding friction endurance test can be adaptively adjusted, closed-loop control can be achieved, test accuracy can be improved, and the sliding friction function can meet the expected requirements during the entire endurance test.

[0051] In addition, after determining the completion of the initial torque and the initial friction work, this solution can also determine the initial friction time and the initial friction power according to the conversion relationship between torque, friction work, friction power, friction time, input motor speed and output motor speed, so as to realize adaptive adjustment of the initial experimental parameters of each clutch friction endurance test, realize closed-loop control, improve test accuracy, and ensure that the experimental parameters can meet the expected requirements during the entire endurance test.

[0052] S220: Determine actual test parameters of the clutch slip durability test according to a preset period.

[0053] The actual test parameters include the actual number of slips, which may be the number of times the clutch slip endurance test has been successfully performed.

[0054] S230: If it is determined that the actual test parameter is less than or equal to the preset parameter, and the actual sliding time is consistent with the initial sliding time this time, then the counter value is updated.

[0055] Wherein, the counter is used to record the actual number of sliding times.

[0056] Among them, if the scheme determines that the actual test parameter is less than or equal to the preset parameter, and the actual slip time is consistent with the initial slip time, it means that the current clutch slip endurance test is completed, and the counter value representing the actual slip times is updated, that is, the counter value increases by 1. At the same time, the actual slip work calculation is completed, and the actual slip work is reset.

[0057] S240: If it is determined that the counter value is less than the initial slip number, return to execute to determine at least one initial test parameter, and start the clutch slip endurance test operation based on each initial test parameter, until the actual test parameter is greater than the preset parameter, or the counter value is equal to the initial slip number, and the clutch slip endurance test operation is ended.

[0058] For example, if the counter value is determined to be less than the initial slip times, it means that the clutch slip endurance test needs to be continued, and at least one initial test parameter for the next time is determined, and the next clutch slip endurance test operation is started based on each initial test parameter until the actual test parameter is greater than the preset parameter, that is, the actual test parameter is abnormal, and the clutch slip endurance test operation is terminated. Or, until the counter value is equal to the initial slip times, that is, the clutch slip endurance test is successfully completed, the clutch slip endurance test operation is terminated.

[0059] The technical solution provided by the embodiment of the present invention determines at least one initial test parameter, and starts the clutch slip durability test operation based on each initial test parameter; determines the actual test parameters of the clutch slip durability test according to a preset period; if it is determined that the actual test parameter is less than or equal to the preset parameter, and the actual slip time is consistent with the initial slip time, then updates the counter value; if it is determined that the counter value is less than the initial slip times, then returns to determine at least one initial test parameter, and starts the clutch slip durability test operation based on each initial test parameter, until the actual test parameter is greater than the preset parameter, or the counter value is equal to the initial slip times, and ends the clutch slip durability test operation. By executing the technical solution provided by the embodiment of the present invention, it is possible to automatically execute the clutch slip durability bench test operation, and monitor the test process in real time, to ensure the safety of the clutch during the test, reduce losses, and improve test efficiency and test quality.

[0060] In order to more clearly describe the technical solution of the present invention, the monitoring method of the clutch slip durability test process in the embodiment of the present invention may include the following steps:

[0061] Step 1: Determine at least one initial test parameter, and start the clutch slip durability test operation based on each initial test parameter.

[0062] Among them, this scheme can determine the input motor speed, output motor speed, initial slip time, initial slip times and initial torque of the clutch slip durability test, so that the expected speed difference is generated between the input and output ends of the test sample. And by checking the torque-clutch pressure correspondence curve, the clutch pressure corresponding to the initial torque is obtained, and the clutch pressure is controlled to make the clutch slip, and the clutch slip durability test operation is started. The actual slip time is recorded as treal .

[0063] Step 2: Determine the actual test parameters of the clutch slip durability test according to the preset cycle.

[0064] If it is determined that the actual test parameter is greater than the preset parameter, execute step 3; if it is determined that the actual test parameter is less than or equal to the preset parameter, execute step 4.

[0065] Among them, this solution can determine the actual torque, input motor speed value and output motor speed value at a frequency of 100 Hz.

[0066] Step 3: Terminate the clutch slip durability test operation.

[0067] Among them, this scheme can determine the actual test parameters of the bench control in real time, specifically: (1) If it is determined that the actual torque is greater than the preset torque, the clutch slip durability test operation is terminated and an alarm signal is sent. (2) The actual slip power (in kW) is determined according to the actual torque (in NM), the input motor speed (in r / min) and the output motor speed (in r / min). If it is determined that the actual slip power is greater than the preset slip power, the clutch slip durability test operation is terminated and an alarm signal is sent. (3) At the beginning of a single clutch slip durability test, the actual slip power value is accumulated and calculated, and divided by the sampling frequency to obtain the actual slip work. When the single clutch slip durability test ends, the actual slip work calculation ends and the actual slip work is reset. During the clutch slip test, if it is determined that the actual slip work is greater than the preset slip work, the clutch slip durability test operation is terminated and an alarm signal is sent. (4) If it is determined that the actual slip time is greater than the preset slip time, the clutch slip durability test operation is terminated and an alarm signal is sent. The determination condition for starting the single clutch slip durability test may be that the actual torque is greater than T min The single clutch slip durability test ends when the actual torque is less than T min Where T min It is determined based on the drag torque when there is no slippage in the clutch, and is generally about 5NM larger than the drag torque.

[0068] The clutch slip and friction endurance test operation can be terminated by controlling the clutch pressure to be reduced to zero to disengage the clutch. After the clutch is disengaged, the motor speed is controlled to be reduced to zero, and the control frame is shut down.

[0069] Step 4: If it is determined that the actual sliding time is consistent with the initial sliding time, the counter value is updated and step 5 is executed.

[0070] The clutch continues to slip until the actual slip time is equal to the initial slip time, and the actual slip time is reset to zero. The clutch pressure is controlled to drop to zero to disengage the clutch. The actual slip times are incremented by 1.

[0071] Step 5. If it is determined that the counter value is less than the initial slip number, return to execute to determine at least one initial test parameter, and start the clutch slip endurance test operation based on each initial test parameter until the actual test parameter is greater than the preset parameter, or the counter value is equal to the initial slip number, and the clutch slip endurance test operation ends.

[0072] Specifically, this solution may take the time interval during the previous clutch slip durability test operation when the actual torque is greater than half of the previous initial torque as the effective slip interval.

[0073] (1) The average torque is denoted by T avg , the previous initial torque is recorded as T 0 , this initial torque is recorded as T 1 The average torque T avg With the previous initial torque T 0 For comparison, when |T 0 -T avg |≥T offset When , the initial torque is corrected, and the initial torque T 1 =T 0 +(T 0 -T avg ) / 2; when |T 0 -T avg | <T offset When the initial torque is not corrected, the initial torque T 1 =T 0 (2) According to T 1 The clutch pressure of this slipping friction is obtained by using the torque-clutch pressure corresponding curve. (3) The actual torque in the effective slipping friction range is denoted as T real The average torque is denoted as T avg , the previous initial torque is recorded as T 0 The effective sliding friction work in the effective sliding friction range is recorded as W total The effective torque in the effective sliding friction range is T real +(T 0 -T avg ) / 2. The actual sliding power at a certain moment is determined by the actual input motor speed, actual output motor speed and actual torque at that moment. Actual sliding power = (actual input motor speed - actual output motor speed) × actual torque / 9550. The actual sliding power at a certain moment is determined by all the actual sliding powers and sampling frequency of this clutch sliding endurance test before that moment. That is, Wtotal The actual friction power in the effective friction interval is divided by the sampling frequency. The actual friction work is the value obtained by dividing the accumulated value of all actual friction powers by the sampling frequency. Then, the initial friction work is determined based on the relationship between the effective friction work and the previous initial friction work. The friction work compensation threshold W offset It can be set according to actual needs. The previous initial sliding friction work is recorded as W 0 , the initial friction work is recorded as W 1 . The effective friction work W total The initial friction work W 0 For comparison, when |W 0 -W total |≥W offset When , the initial friction work is corrected, and the initial friction work W 1 =W 0 +(W 0 -W total ) / 2; when |W 0 -W total | <W offset When the initial sliding friction work is not corrected, W 1 =W 0 (4) Through W 1 Calculate the initial sliding time.

[0074] If it is determined that the actual number of slips is less than the initial number of slips, steps 1 to 5 are repeated; if it is determined that the actual number of slips is greater than or equal to the initial number of slips, the clutch slip durability bench test is terminated.

[0075] The clutch slip durability bench test is an important test in the verification of clutch assemblies. The general practice is to control the clutch input speed and output speed to produce a certain speed difference. At this time, the clutch control parameters are given to make the clutch engage, obtain a certain torque, and make the clutch slip. After a certain period of time, the clutch is disconnected. This is repeated a certain number of times to achieve the purpose of assessing the reliability of the clutch. In this process, it is necessary to ensure that the slip torque, slip power, slip time, and slip power of the clutch at each slip meet the expected requirements. These parameters are determined by the setting of the clutch parameters and belong to open-loop control. There are two risks: (1) Due to software failure or human error, the clutch slip torque is too large or the slip time is too long, resulting in clutch ablation; (2) Due to the decline in the clutch torque transmission capacity during the slip durability process, the expected slip torque and slip power cannot be obtained under fixed clutch parameters, and the test results are inaccurate.

[0076] Inaccurate control of test conditions during clutch testing often leads to abnormal damage to samples or insufficient test verification. Existing closed-loop control technology and diagnostic technology are often applied to the vehicle level, such as torque closed-loop control, clutch surface temperature calculation and diagnosis, etc. The clutch durability test belongs to the component level test, which is in the early stage of product development. At this time, the relevant control strategy on the vehicle is not complete. At the same time, the vehicle diagnostic strategy is very complex and requires a large number of input signals to be implemented, but these conditions are not available on the test bench. The clutch slip durability test process diagnosis and adaptive control system and method provided by the present invention is a method for protecting and closed-loop controlling the clutch suitable for bench testing. The system and method can use the existing signals of the test bench for calculation and analysis, and diagnose the test process from multiple dimensions such as slip torque, slip power, slip time, slip work, etc. When the threshold is exceeded, the equipment can be safely shut down to ensure the safety of the clutch during the test. At the same time, the test results can be processed and analyzed in real time during the test, and the clutch control parameters for the next time can be corrected to achieve closed-loop control, improve the test accuracy, and ensure that the test conditions are accurately controlled during the entire durability test.

[0077] Figure 3 is a schematic diagram of the structure of a monitoring device for a clutch slippage durability test process provided by an embodiment of the present invention. The device can be configured in an electronic device for monitoring a clutch slippage durability test process, such as Figure 3 As shown, the device comprises:

[0078] The clutch slip and friction durability test operation starting module 310 is used to determine at least one initial test parameter and start the clutch slip and friction durability test operation based on each of the initial test parameters;

[0079] An actual test parameter determination module 320 is used to determine the actual test parameters of the clutch slip endurance test according to a preset period; the actual test parameters are generated during the clutch slip endurance test; the actual test parameters include at least one of actual torque, actual slip power, actual slip work and actual slip time;

[0080] The judgment module 330 is used to terminate the clutch slip endurance test operation if it is determined that the actual test parameter is greater than the preset parameter.

[0081] Optionally, the judgment module 330 is specifically used to terminate the clutch slip endurance test operation if it is determined that the actual torque is greater than the preset torque; or, if it is determined that the actual slip power is greater than the preset slip power, then terminate the clutch slip endurance test operation; or, if it is determined that the actual slip work is greater than the preset slip work, then terminate the clutch slip endurance test operation; or, if it is determined that the actual slip time is greater than the preset slip time, then terminate the clutch slip endurance test operation.

[0082] Optionally, the initial test parameters include the current initial slip time and the initial slip number; the actual test parameters include the actual slip number; the device also includes a counter value updating unit for updating the counter value if it is determined that the actual test parameters are less than or equal to the preset parameters, and the actual slip time is consistent with the current initial slip time; the counter is used to record the actual slip number; a loop unit for returning to determine at least one initial test parameter if it is determined that the counter value is less than the initial slip number, and starting the current clutch slip endurance test operation based on each of the initial test parameters, until the actual test parameters are greater than the preset parameters, or the counter value is equal to the initial slip number, thereby terminating the clutch slip endurance test operation.

[0083] Optionally, the initial test parameters include the initial torque of this time; the clutch slip endurance test operation starting module 310 includes an average torque determination unit, which is used to determine the effective slip interval of the previous clutch slip endurance test operation, and determine the average torque of the effective slip interval; the effective slip interval is the time interval during the previous clutch slip endurance test operation when the actual torque is greater than half of the previous initial torque; the initial torque determination unit of this time is used to determine the initial torque of this time based on the average torque and the previous initial torque.

[0084] Optionally, the current initial torque determination unit is specifically used to, if it is determined that the absolute value of the difference between the average torque and the previous initial torque is greater than or equal to a torque compensation threshold, use the sum of the average value of the difference between the previous initial torque and the average torque and the previous initial torque as the current initial torque; or, if it is determined that the absolute value of the difference between the average torque and the previous initial torque is less than the torque compensation threshold, use the previous initial torque as the current initial torque.

[0085] Optionally, the initial test parameters include the initial sliding friction work of this time;

[0086] The clutch slip durability test operation start module 310 includes an effective torque determination unit, which is used to determine at least one effective torque within the effective slip interval; the effective torque is the sum of the average value of the difference between the previous initial torque and the average torque and the actual torque; an effective slip work determination unit, which is used to determine the effective slip work within the effective slip interval according to each effective torque; and a current initial slip work determination unit, which is used to determine the current initial slip work according to the effective slip work and the previous initial slip work.

[0087] Optionally, the unit for determining the initial sliding work for this time is specifically used to, if it is determined that the absolute value of the difference between the effective sliding work and the previous initial sliding work is greater than or equal to a sliding work compensation threshold, use the sum of an average value of the difference between the previous initial sliding work and the effective sliding work and the previous initial sliding work as the initial sliding work for this time; or, if it is determined that the absolute value of the difference between the effective sliding work and the previous initial sliding work is less than the sliding work compensation threshold, use the previous initial sliding work as the initial sliding work for this time.

[0088] The device provided in the above-mentioned embodiment can execute the monitoring method of the clutch slip durability test process provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0089] Figure 4 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention, such as Figure 4 As shown, the device includes:

[0090] one or more processors 410, Figure 4 A processor 410 is taken as an example;

[0091] Memory 420;

[0092] The device may further include: an input device 430 and an output device 440 .

[0093] The processor 410, memory 420, input device 430 and output device 440 in the device may be connected via a bus or other means. Figure 4 The example of connecting through bus is taken in the following.

[0094] The memory 420, as a non-transitory computer-readable storage medium, can be used to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to a method for monitoring a clutch slip durability test process in an embodiment of the present invention. The processor 410 executes various functional applications and data processing of the computer device by running the software programs, instructions and modules stored in the memory 420, that is, to implement a method for monitoring a clutch slip durability test process in the above method embodiment, namely:

[0095] Determining at least one initial test parameter, and starting the clutch slip durability test operation based on each of the initial test parameters;

[0096] Determine the actual test parameters of the clutch slip durability test according to a preset period; the actual test parameters are generated during the clutch slip durability test; the actual test parameters include at least one of actual torque, actual slip power, actual slip work and actual slip time;

[0097] If it is determined that the actual test parameter is greater than the preset parameter, the clutch slip endurance test operation is terminated.

[0098] The memory 420 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 420 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 420 may optionally include a memory remotely arranged relative to the processor 410, and these remote memories may be connected to the terminal device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0099] The input device 430 may be used to receive input digital or character information and generate key signal input related to user settings and function control of the computer device. The output device 440 may include a display device such as a display screen.

[0100] An embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, a method for monitoring a clutch slip durability test process provided by an embodiment of the present invention is implemented, namely:

[0101] Determining at least one initial test parameter, and starting the clutch slip durability test operation based on each of the initial test parameters;

[0102] Determine the actual test parameters of the clutch slip durability test according to a preset period; the actual test parameters are generated during the clutch slip durability test; the actual test parameters include at least one of actual torque, actual slip power, actual slip work and actual slip time;

[0103] If it is determined that the actual test parameter is greater than the preset parameter, the clutch slip endurance test operation is terminated.

[0104] Any combination of one or more computer-readable media may be used. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, device, or device.

[0105] Computer-readable signal media may include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0106] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0107] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0108] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for monitoring a clutch friction durability test process, characterized in that: include: Determining at least one initial test parameter, and starting the clutch slip durability test operation based on each of the initial test parameters; Determining actual test parameters of the clutch slip durability test according to a preset period; The actual test parameter is generated during the clutch slip durability test; the actual test parameter includes at least one of actual torque, actual slip power, actual slip work and actual slip time; If it is determined that the actual test parameter is greater than the preset parameter, terminating the clutch slip durability test operation; The initial test parameters include the initial torque; Determining at least one initial test parameter comprises: Determine the effective slip interval of the previous clutch slip durability test operation, and determine the average torque of the effective slip interval; the effective slip interval is the time interval during the previous clutch slip durability test operation when the actual torque is greater than half of the previous initial torque; The current initial torque is determined according to the average torque and the previous initial torque.

2. The method according to claim 1, characterized in that If it is determined that the actual test parameter is greater than the preset parameter, terminating the clutch slip durability test operation, including: If it is determined that the actual torque is greater than the preset torque, the clutch slip endurance test operation is terminated; or, If it is determined that the actual slip power is greater than the preset slip power, then terminating the clutch slip endurance test operation; or, If it is determined that the actual sliding friction work is greater than the preset sliding friction work, the clutch sliding friction endurance test operation is terminated; or, If it is determined that the actual slip time is greater than the preset slip time, the clutch slip endurance test operation is terminated.

3. The method according to claim 1, characterized in that The initial test parameters include the initial sliding time and the initial sliding times; the actual test parameters include the actual sliding times; The method further comprises: If it is determined that the actual test parameter is less than or equal to the preset parameter, and the actual sliding time is consistent with the initial sliding time, then the counter value is updated; the counter is used to record the actual number of sliding times; If it is determined that the counter value is less than the initial slip number, the process returns to determine at least one initial test parameter, and starts the clutch slip endurance test operation based on each initial test parameter until the actual test parameter is greater than the preset parameter, or the counter value is equal to the initial slip number, and the clutch slip endurance test operation is ended.

4. The method according to claim 1, characterized in that: Determining the current initial torque according to the average torque and the previous initial torque includes: If it is determined that the absolute value of the difference between the average torque and the previous initial torque is greater than or equal to the torque compensation threshold, the sum of the average value of the difference between the average torque and the previous initial torque and the previous initial torque is taken as the current initial torque; or, If it is determined that the absolute value of the difference between the average torque and the previous initial torque is smaller than the torque compensation threshold, the previous initial torque is used as the current initial torque.

5. The method according to claim 4, characterized in that The initial test parameters include the initial sliding friction work; Determine at least one initial test parameter, including: Determine at least one effective torque in the effective sliding friction interval; the effective torque is the sum of an average value of a difference between the previous initial torque and the average torque and an actual torque; Determining effective friction work in the effective friction interval according to each effective torque; The current initial friction work is determined according to the effective friction work and the previous initial friction work.

6. The method according to claim 5, characterized in that Determining the current initial friction work according to the effective friction work and the previous initial friction work includes: If it is determined that the absolute value of the difference between the effective sliding friction work and the previous initial sliding friction work is greater than or equal to the sliding friction work compensation threshold, the sum of the average value of the difference between the effective sliding friction work and the previous initial sliding friction work and the previous initial sliding friction work is taken as the current initial sliding friction work; or, If it is determined that the absolute value of the difference between the effective sliding friction work and the previous initial sliding friction work is smaller than the sliding friction work compensation threshold, the previous initial sliding friction work is used as the current initial sliding friction work.

7. A monitoring device for a clutch friction durability test process, characterized in that: include: A clutch slip and friction durability test operation starting module, used to determine at least one initial test parameter, and start the clutch slip and friction durability test operation based on each of the initial test parameters; An actual test parameter determination module, used to determine the actual test parameters of the clutch slip durability test according to a preset period; The actual test parameter is generated during the clutch slip durability test; the actual test parameter includes at least one of actual torque, actual slip power, actual slip work and actual slip time; A judgment module, configured to terminate the clutch slip durability test operation if it is determined that the actual test parameter is greater than a preset parameter; The initial test parameters include the initial torque; The clutch slip and friction durability test operation start module comprises: an average torque determination unit, for determining an effective slip interval of a previous clutch slip endurance test operation, and determining an average torque of the effective slip interval; the effective slip interval is a time interval during the previous clutch slip endurance test operation when the actual torque is greater than half of the previous initial torque; The current initial torque determination unit is used to determine the current initial torque according to the average torque and the previous initial torque.

8. An electronic device, characterized in that: include: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the method for monitoring the clutch slip durability test process as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, a monitoring method for a clutch slip durability test process as described in any one of claims 1 to 6 is implemented.

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