An engine suspension test bench, method, device and storage medium

Abstract

The embodiment of the present application provides an engine suspension test bench, method, equipment and storage medium, comprising: a vibration table for restraining and installing an engine and suspension to be tested; a support buffer arranged below the vibration table, used for supporting the vibration table and the engine and suspension to be tested, so that the vibration table and the engine and suspension to be tested are in a suspended state; an exciter arranged on opposite sides of the vibration table, the exciter being used for driving the vibration table to vibrate when in-phase excitation or anti-phase excitation, so as to simulate road vibration; and a controller connected with the exciter, used for in-phase excitation or anti-phase excitation of the exciter. Through the test of the bench of the embodiment of the present application, the vibration performance similar to the road surface can be simulated, the risk assessment and abnormal sound problem reproduction function of the suspension abnormal sound are realized, so that the verification period is shortened and the comprehensiveness of the test is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile part testing, and in particular to an engine suspension test bench, an engine suspension test method, an electronic device, a computer readable storage medium and a test device. BACKGROUND

[0002] Engine suspension abnormal noise mainly refers to a series of abnormal noises caused by the engine left suspension, the engine right suspension or the roll bar when the automobile is driven at low speed on the impact road surface such as the deceleration lane, the angle steel and the pothole. The existing method needs to carry out road test or four-channel vibration test after the sample is mounted on the whole vehicle to discover and reproduce the engine suspension abnormal noise, the time of discovering the abnormal noise is too late, the improvement sample and the later verification period are too long, and the whole vehicle project development and delivery schedule requirements cannot be guaranteed. SUMMARY

[0003] In view of the above problems, the present application is proposed to provide an engine suspension test bench, an engine suspension test method, an electronic device, a computer readable storage medium and a test device which overcome the above problems or at least partially solve the above problems.

[0004] In order to solve the above problems, in the first aspect of the present application, the present application discloses an engine suspension test bench, comprising:

[0005] A vibration table for restraining and mounting the engine and suspension to be tested;

[0006] A support buffer arranged below the vibration table for supporting the vibration table and the engine and suspension to be tested, so that the vibration table and the engine and suspension to be tested are in a suspended state;

[0007] Exciters arranged on opposite sides of the vibration table, the exciters being used to drive the vibration table to vibrate when in-phase excitation or anti-phase excitation, so as to simulate road vibration;

[0008] A controller connected with the exciters for in-phase excitation or anti-phase excitation of the exciters.

[0009] Optionally, the exciter comprises:

[0010] An exciter body arranged below the vibration table and connected with the controller and the vibration table, for driving the vibration table to vibrate under the in-phase excitation or anti-phase excitation of the controller.

[0011] Optionally, the exciter further comprises:

[0012] A transmission lever, one end of which is connected to the exciter body and the other end of which is connected to the vibration table, is used to transmit the vibration of the exciter body.

[0013] Optionally, the exciter further comprises:

[0014] An exciter buffer is arranged on the side of the exciter body away from the vibration table, and is used to buffer the vibration of the exciter body.

[0015] Optionally, the vibration table comprises:

[0016] A cross beam and a longitudinal beam are connected to each other perpendicularly to form a cross structure.

[0017] A suspension bracket is arranged on the cross beam or the longitudinal beam, and is used to be connected with the engine and suspension to be tested, so as to fix the engine and suspension to be tested to the cross structure.

[0018] Optionally, the support buffer comprises:

[0019] An air spring is arranged at the intersection of the cross structure, and is used to support the vibration table and the engine and suspension to be tested.

[0020] Optionally, the application further comprises:

[0021] An acceleration sensor is fixedly connected to the vibration table, and is used to detect the acceleration output signal of the vibration table.

[0022] A displacement sensor is fixedly connected to the vibration table, and is used to detect the position signal of the vibration table in the vertical direction.

[0023] The controller is used to in-phase excite or anti-phase excite the exciter based on the acceleration output signal and / or the position signal.

[0024] Optionally, the application further comprises:

[0025] A limiting piece is connected to the vibration table, and is used to limit the movement range of the vibration table.

[0026] In the second aspect of the application, the embodiments of the application disclose an engine suspension testing method applied to the engine suspension testing bench described above, and the method comprises the following steps.

[0027] Obtaining a road spectrum signal;

[0028] Analyzing the road spectrum signal to determine the driving signal of the exciter;

[0029] Controlling the support buffer to start, so that the vibration table and the engine and suspension to be tested are in a suspended state.

[0030] After the vibration table and the engine to be tested and the suspension are in a suspended state, the controller is controlled to excite the exciter in phase or in reverse phase according to the driving signal.

[0031] Optionally, the step of analyzing the road spectrum signal to determine the driving signal of the exciter comprises:

[0032] analyzing the road spectrum signal to determine an excitation type and a target vibration amount;

[0033] obtaining a current vibration amount of the vibration table;

[0034] performing a closed-loop control operation based on the target vibration amount and the current vibration amount to determine a vibration control amount;

[0035] determining the driving signal of the exciter based on the excitation type and the vibration control amount.

[0036] Optionally, the step of performing a closed-loop control operation based on the target vibration amount and the current vibration amount to determine a vibration control amount comprises:

[0037] calculating a difference between the target vibration amount and the current vibration amount;

[0038] performing motion compensation on the difference to determine the vibration control amount.

[0039] In a third aspect, an electronic device is disclosed, which comprises a processor, a memory, and a computer program stored in the memory and capable of running on the processor, and the computer program, when executed by the processor, implements the engine suspension test method as described above.

[0040] In a fourth aspect, a computer readable storage medium is disclosed, which stores a computer program, and the computer program, when executed by a processor, implements the engine suspension test method as described above.

[0041] In a fourth aspect, a test device is disclosed, which comprises the engine suspension test bench as described above.

[0042] The embodiments of the present application have the following advantages:

[0043] The embodiment of the present application is used for restraining and mounting the engine and suspension to be tested through a vibration table; a support buffer is arranged below the vibration table and is used for supporting the vibration table and the engine and suspension to be tested, so that the vibration table and the engine and suspension to be tested are in a suspended state; an exciter is arranged on the opposite sides of the vibration table, and the exciter is used for driving the vibration table to vibrate when in-phase excitation or anti-phase excitation, so as to simulate road vibration; a controller is connected with the exciter and is used for in-phase excitation or anti-phase excitation of the exciter. The vibration table is balanced through the support buffer, the vibration table and the engine and suspension to be tested are in a suspended state, the exciter transmits vibration to the vibration table in in-phase excitation or anti-phase excitation, so that the engine and suspension to be tested can realize random motion of six degrees of freedom, so as to completely simulate the expected random vibration response of the engine and suspension to be tested when the whole vehicle is subjected to road impact vibration, the test is carried out through the test bench, the vibration performance similar to the road can be simulated, the risk assessment and abnormal sound problem reproduction function of the suspension are realized, so as to shorten the verification period and ensure the comprehensiveness of the test. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 is a structural perspective view of an engine suspension test bench embodiment of the present application;

[0045] Figure 2 is a structural perspective view of another engine suspension test bench embodiment of the present application;

[0046] Figure 3 is a step flow chart of an engine suspension test method embodiment of the present application;

[0047] Figure 4 is a structural block diagram of an electronic device provided by the embodiment of the present application;

[0048] Figure 5 is a structural block diagram of a storage medium provided by the embodiment of the present application.

[0049] Mark for legend: 100-vibration table; 110-cross beam; 120-longitudinal beam; 130-suspension support; 200-support buffer; air spring 210; 300-exciter; 310-exciter body; 320-transmission lever; 330-exciter buffer; 400-acceleration sensor; 500-displacement sensor; 600-limiting piece; 700-support block. DETAILED DESCRIPTION

[0050] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0051] REFERENCE Figure 1Fig. 1 shows a structural perspective view of an engine suspension test bench according to the present application; the engine suspension test bench comprises:

[0052] a vibration table 100 for constraining and mounting the engine and suspension to be tested;

[0053] a support buffer 200 arranged below the vibration table 100 for supporting the vibration table 100 and the engine and suspension to be tested, so that the vibration table 100 and the engine and suspension to be tested are in a suspended state;

[0054] vibration exciters 300 arranged on opposite sides of the vibration table 100, the vibration exciters 300 being used to drive the vibration table 100 to vibrate when in-phase excitation or anti-phase excitation is performed, so as to simulate road vibration;

[0055] a controller (not shown in the figure) connected to the vibration exciters 300, and used to perform in-phase excitation or anti-phase excitation on the vibration exciters 300.

[0056] In the embodiment of the present application, the engine suspension test bench is composed of at least the vibration table 100, the support buffer 200, the vibration exciters 300 and the controller. The vibration table 100 is a support base, and is used to constrain and mount the engine and suspension to be tested. That is, the engine and suspension to be tested can be mounted on the vibration table 100 according to the constraint conditions and assembly method when mounted on a whole vehicle, so as to completely simulate the case of real vehicle installation.

[0057] The support buffer 200 is arranged below the vibration table 100, that is, in the vertical direction of the vibration table 100, and below the mounting plane of the vibration table 100. The support buffer 200 can support the vibration table 100 and the engine and suspension to be tested, and the vibration table 100 and the engine and suspension to be tested are in a suspended state, so as to simulate the case of real vehicle installation, and avoid the vibration table 100 from interfering with the movement of the engine and suspension to be tested, and from limiting the movement of the engine and suspension to be tested in different degrees of freedom, so as to facilitate the engine and suspension to be tested to randomly vibrate in six degrees of freedom when subsequent vibration is performed, and so as to comprehensively test the engine and suspension to be tested.

[0058] The two excitation devices 300 are arranged on opposite sides of the vibration table 100, such as opposite sides of the vibration table 100 in the lateral direction, i.e. left and right sides of the vibration table 100. The two excitation devices 300 are arranged on the left and right sides of the vibration table 100, respectively, to simulate the acceleration signals collected on the left and right longitudinal beams 120 of the whole vehicle to separately excite the left and right sides of the vibration table 100. When the two excitation devices 300 are excited in phase, the vertical movement of the vibration table 100 can be realized, and when the left and right excitation devices 300 are excited in opposite phase, the longitudinal yaw movement of the engine can be realized. Of course, whether in-phase or opposite-phase excitation depends on the requirements of different road spectrum signals. For example, the Belgian road and the steel rope road spectrum have longitudinal components in the vertical movement, and opposite-phase control is required. For example, the angle steel road and the deceleration belt only have vertical excitation, and in-phase control is required. After the engine and the suspension are excited by the vibration table 100 simulating the road excitation, the corresponding state is presented to simulate the amplitude and frequency range of the real road excitation.

[0059] Specifically, the excitation device 300 comprises an excitation device body 310 arranged below the vibration table 100 and connected with the controller and the vibration table 100, for driving the vibration table 100 to vibrate under the in-phase excitation or opposite-phase excitation of the controller.

[0060] The excitation device body 310 can be directly arranged below the vibration table 100, such as Figure 1As shown, the lower part of the left and right sides of the vibration table 100 is mechanically connected to the vibration table 100 and electrically connected to the controller. Under the same phase excitation or opposite phase excitation of the controller, the vibration table 100 is driven to vibrate. The exciter body 310 can adopt an electromagnetic exciter 300, so that the vibration table 100 can be vibrated under the driving of the electric signal of the controller to simulate the vibration condition of the actual road. The working principle of the electromagnetic exciter 300 is based on electromagnetic induction and vibration principle. When alternating current, alternating current plus direct current, or pulsating current after half-wave rectification is input to the coil of the electromagnetic exciter 300, a periodically changing magnetic field will be generated between the electromagnetic iron core and the armature. This changing magnetic field will attract or repel the armature, thereby generating a periodically changing excitation force. This excitation force is transmitted to the excited object through the armature, so that the excited object obtains a certain form and size of vibration. The electromagnetic exciter 300 is usually composed of an electromagnetic iron core with a coil and an armature, and a spring is installed between the iron core and the armature. This structure makes the electromagnetic exciter 300 not only generate excitation force, but also maintain a certain stability and flexibility. And using the electromagnetic exciter 300 has the following advantages: large vibration force: the electromagnetic exciter 300 generates excitation force through electromagnetic force, which can generate larger vibration force to meet various vibration requirements. Adjustable frequency: by adjusting the frequency and amplitude of the input current, the vibration frequency and amplitude of the electromagnetic exciter 300 can be easily adjusted. Good stability: the electromagnetic exciter 300 works on the principle of electromagnetism, which has good stability and reliability. Strong adaptability: the electromagnetic exciter 300 can adapt to various complex working environments such as high temperature, low temperature, humidity, etc. Simple maintenance: the structure of the electromagnetic exciter 300 is relatively simple, and the maintenance is more convenient.

[0061] The controller can be electrically connected to the exciter 300, and based on different road spectrum signals, the exciter 300 can be excited in phase or out of phase to simulate road vibration.

[0062] The embodiment of the present application is used for restraining and installing the engine and suspension to be tested through the vibration table 100; the support buffer 200 arranged below the vibration table 100 is used for supporting the vibration table 100 and the engine and suspension to be tested, so that the vibration table 100 and the engine and suspension to be tested are in a suspended state; the exciter 300 arranged on the opposite sides of the vibration table 100 is used for driving the vibration table 100 to vibrate when in-phase excitation or anti-phase excitation, so as to simulate road vibration; the controller connected with the exciter 300 is used for in-phase excitation or anti-phase excitation of the exciter 300. The vibration table 100 is balanced through the support buffer 200, the vibration table 100 and the engine and suspension to be tested are in a suspended state, the exciter 300 transmits vibration to the vibration table 100 when in-phase excitation or anti-phase excitation, so that the engine and suspension to be tested can realize six degrees of freedom random motion, so as to completely simulate the expected random vibration response of the engine and suspension to be tested when the whole vehicle is subjected to road impact vibration, the test is carried out through the test bench, the vibration performance similar to the road can be simulated, the risk evaluation and abnormal sound problem reproduction function of the suspension are realized, so as to shorten the verification period and ensure the comprehensiveness of the test.

[0063] Reference Figure 2 Another engine suspension test bench embodiment of the present application is shown in the structural perspective view; the engine suspension test bench comprises:

[0064] The vibration table 100 is used for restraining and installing the engine and suspension to be tested;

[0065] The support buffer 200 arranged below the vibration table 100 is used for supporting the vibration table 100 and the engine and suspension to be tested, so that the vibration table 100 and the engine and suspension to be tested are in a suspended state;

[0066] The exciter 300 arranged on the opposite sides of the vibration table 100 is used for driving the vibration table 100 to vibrate when in-phase excitation or anti-phase excitation, so as to simulate road vibration;

[0067] The acceleration sensor 400 fixedly connected with the vibration table 100 is used for detecting the acceleration output signal of the vibration table 100;

[0068] The displacement sensor 500 fixedly connected with the vibration table 100 is used for detecting the position signal of the vibration table 100 in the vertical direction;

[0069] The controller connected with the exciter 300 is used for in-phase excitation or anti-phase excitation of the exciter 300 based on the acceleration output signal and / or the position signal;

[0070] A limiting member 600 is connected with the vibration table 100 and used to limit the movement range of the vibration table 100.

[0071] In the embodiment of the present application, the engine suspension test bench can include the vibration table 100, the support buffer 200, the exciter 300, the acceleration sensor 400, the displacement sensor 500, the controller and the limiting member 600.

[0072] The vibration table 100 is used to constrain and mount the engine and suspension to be tested, so that the engine and suspension to be tested can be mounted into the test bench based on the mounting condition on the whole vehicle. The vibration table 100 can include the suspension support 130, the cross beam 110 and the longitudinal beam 120, the cross beam 110 and the longitudinal beam 120 are connected with each other perpendicularly to form a cross structure; the suspension support 130 is arranged on the cross beam 110 or the longitudinal beam 120 and used to be connected with the engine and suspension to be tested, so as to fix the engine and suspension to be tested to the cross structure. The engine and suspension are stably and effectively simulated to be mounted on the real vehicle through the suspension support 130, the cross beam 110 and the longitudinal beam 120, so as to improve the accuracy of the test. Moreover, the stability of the vibration table 100 can be improved by arranging the vibration table 100 as the cross structure, and the mounting environment of the engine and suspension on the vehicle can be simulated.

[0073] The support buffer 200 is arranged below the vibration table 100 and supports the vibration table 100 and the engine and suspension to be tested, so that the vibration table 100 and the engine and suspension to be tested are in a suspended state. Specifically, the support buffer 200 includes the air spring 210 arranged at the intersection position of the cross structure and used to support the vibration table 100 and the engine and suspension to be tested. The support force of the air spring 210 has a nonlinear characteristic, the air pressure of each air spring 210 can be controlled individually by the controller, a certain air pressure is filled to keep the vibration table 100 balanced, so that the engine and suspension to be tested are in the suspended state with the vibration table 100 to facilitate the random vibration generated when the exciter 300 is excited. The air spring 210 is used to support the mass of the engine and suspension to be tested, and the relative movement of the test bench is ensured by the certain elasticity of the air spring 210, so as to realize the flexible connection. The air spring 210 can be arranged at the intersection position of the cross structure, i.e. arranged at the four corners as shown in the figure, so as to stably support. Figure 2

[0074] In addition, in order to fix the air spring 210, the air spring 210 support can be arranged at the bottom of the air spring 210 and used to mount and fix the air spring 210.

[0075] ​Two exciters 300 may be provided, respectively disposed on opposite sides of the vibration table 100. The exciters 300 drive the vibration table 100 to vibrate under in-phase or out-of-phase excitation to simulate road vibration. Specifically, the exciter body 310 is disposed on the side of the support buffer 200 away from the vibration table 100. The exciter 300 includes: an exciter body 310 disposed below the vibration table 100 and connected to the controller and the vibration table 100, used to drive the vibration table 100 to vibrate under in-phase or out-of-phase excitation by the controller; a transmission lever 320, one end connected to the exciter body 310 and the other end connected to the vibration table 100, used to transmit the vibration of the exciter body 310; and an exciter buffer 330 disposed on the side of the exciter body 310 away from the vibration table 100, used to buffer the vibration of the exciter body 310.

[0076] The exciter 300 can be positioned directly below the vibration table 100 to drive the vibration table 100 to vibrate, or it can be positioned on the side of the support buffer 200 away from the vibration table 100, such as... Figure 2 As shown, the vibrator 300 is positioned outside the vibration table 100. The corresponding vibrator body 310 is also positioned outside the vibration table 100. The vibrator body 310 can be an electromagnetic vibrator 300. One end of the vibrator body 310 is connected to the transmission lever 320, and the other end of the transmission lever 320 is connected to the vibration table 100. When the vibrator body 310 vibrates, it transmits the vibration to the vibration table 100, causing the vibration table 100 to vibrate. A vibrator buffer 330 can be positioned on the side of the vibrator body 310 facing away from the vibration table 100. The vibrator buffer 330 buffers the vibration of the vibrator body, preventing damage to the platform from transmission to the ground. The vibrator buffer 330 can also be an air spring 210, allowing for adjustable buffering force using air pressure. It has a similar structure to the support buffer 200, facilitating maintenance and making the structure more compact.

[0077] Furthermore, a single exciter body 310 can achieve an output of different excitation forces ranging from 1000 to 5000 N. The excitation force is calculated based on the system's mass, and the corresponding exciter 300 specification is selected. For example, if the total mass of the engine and its mounting is 100 kg, then to achieve an acceleration excitation of 1 g, the required exciter 300 specification must be at least [specification missing].

[0078] F = ma + mg = 100 * 9.8 m / s 2 +100*9.8m / s 2= 1960N (cows), that is, at least 2 1000N exciter 300 to drive, usually drive a large mass of the measured drive force needs to have a certain margin, can be selected to demand thrust 1.5-2 times to select the exciter 300 to ensure the road spectrum repeatability accuracy.

[0079] In addition, in order to fix the parts of the exciter 300, the exciter 300 support can be provided for mounting and fixing the exciter 300 and the exciter buffer 330.

[0080] The acceleration sensor 400 is fixedly connected with the vibration table 100, and can be arranged in the lateral direction, the longitudinal direction and the vertical direction of the vibration table 100 to detect the acceleration output signals of the vibration table 100 in the three directions. The lateral direction, the longitudinal direction and the vertical direction of the vibration table 100 are the same as the lateral direction, the longitudinal direction and the vertical direction of the vehicle. The lateral direction refers to the left and right sides perpendicular to the driving direction of the vehicle. For example, when driving the vehicle, the left side and the right side of the driver are the lateral direction. The longitudinal direction refers to the direction of the vehicle driving, that is, the direction from the front to the rear of the vehicle. The vertical direction refers to the direction perpendicular to the ground and the driving plane of the vehicle, that is, the up and down direction.

[0081] The displacement sensor 500 is fixedly connected with the vibration table 100, and one can be arranged on each of the left and right sides of the vibration table 100 to detect the position signals of the vibration table 100 in the vertical direction; by monitoring the lowest and highest positions of the vibration table 100, the controller can determine when the four air springs 210 of the table surface charge and discharge according to the signals of the photoelectric displacement sensor 500 to ensure that the table surface always maintains the zero balance position; when the dynamic displacement exceeds the set limit position, the device can also be alarmed or stopped to ensure that the device will not be damaged when the table surface vibration is out of control.

[0082] The controller is a control unit, which can excite the exciter 300 in phase or in anti-phase based on the acceleration output signal and / or the position signal.

[0083] The limiting piece 600 is connected with the vibration table 100, and is used for limiting the movement range of the vibration table 100. The limiting piece 600 can be a limiting spring sheet, and the limiting piece 600 is a leaf spring which is curved and twisted in the movement direction. By supporting the vibration table 100 and limiting in other non-movement directions, the vibration table 100 is prevented from responding excessively to cause movement out of control when the exciter 300 is excited.

[0084] In addition, in order to fix the limiting piece 600, the limiting piece 600 support can be provided for fixing the limiting piece 600.

[0085] Further, in order to avoid the failure of the support buffer 200, such as the sinking of the air frame after the air is exhausted, the support block 700 can be arranged between the vibration table 100 and the exciter 300, which is used to provide hard support for the vibration table 100 and the engine and suspension to be tested after the test is stopped, so as to avoid the damage of the exciter 300 caused by the failure of the support buffer 200.

[0086] In the embodiment of the present application, the left and right suspensions and the rear suspension of the engine can be subjected to abnormal noise bench vibration test at the same time, thereby shortening the period of design verification and product verification, saving the late development cost, advancing the abnormal noise verification test of the suspension from the vehicle level verification to the component level verification, reducing the abnormal noise risk in the development stage, simulating various road excitation to reproduce the abnormal noise problem of the suspension in the vehicle, and stabilizing the input and output relative to the vehicle road test, facilitating problem investigation, verification, quantitative comparison test analysis of improvement measures, and establishment of quantifiable acceptance standards.

[0087] Reference Figure 3 , a step flow chart of an engine suspension test method embodiment of the present application is shown, which can specifically include the following steps:

[0088] Step 301, obtaining a road spectrum signal;

[0089] The road spectrum signal can be obtained according to the test requirement. The road spectrum signal includes but is not limited to a road spectrum signal corresponding to a random steady-state PSD road spectrum, a road spectrum signal corresponding to a periodic or deterministic impact time history road spectrum.

[0090] Among them, the random steady-state PSD road spectrum, that is, the random steady-state power spectral density (PSD) road spectrum, is the power spectral density curve describing the road roughness or other random vibration input characteristics under the condition of a stationary random signal. The periodic or deterministic impact time history spectrum refers to the existence of impact response with a certain fixed frequency or period in the signal, and the time history and amplitude of the impact response are determined or predictable.

[0091] Step 302, analyzing the road spectrum signal to determine the driving signal of the exciter;

[0092] The road spectrum signal can be analyzed to determine the required vibration state, which includes but is not limited to vibration frequency and amplitude. The driving signal of the exciter is determined based on the required vibration state.

[0093] Step 303, controlling the support buffer to start, so that the vibration table and the engine and suspension to be tested are in a suspended state;

[0094] Then when the test needs to be carried out, the support buffer can be started first to support the vibration table and the engine and suspension to be tested, so that the vibration table and the engine and suspension to be tested are in a suspended state.

[0095] Step 304, after the vibration table and the engine and suspension to be tested are in the suspended state, the controller is controlled to excite the exciter in phase or in reverse phase according to the driving signal.

[0096] After the vibration table and the engine and suspension to be tested are in the suspended state, the corresponding vibration test can be carried out. The controller in the console is controlled to send the driving signal to excite the exciter in phase or in reverse phase, so that the exciter carries out corresponding vibration in phase or in reverse phase to simulate the vibration of the vehicle.

[0097] In an optional embodiment of the present application, the step of analyzing the road spectrum signal to determine the driving signal of the exciter comprises: analyzing the road spectrum signal to determine the excitation type and the target vibration amount; obtaining the current vibration amount of the vibration table; performing closed-loop control operation based on the target vibration amount and the current vibration amount to determine the vibration control amount; and determining the driving signal of the exciter based on the excitation type and the vibration control amount.

[0098] For the determination of the driving signal, the determination can be carried out in a closed-loop control manner. First, the road spectrum signal is analyzed to determine the required excitation type and the target vibration amount. The target vibration amount includes the target vibration rate and the vibration amplitude, etc. The excitation type can be in phase or in reverse phase. Then the current vibration amount of the vibration table is obtained, which can be determined by the acceleration output signal detected by the acceleration sensor. Then the target vibration amount is taken as the target value and the current vibration amount is taken as the feedback value to perform closed-loop control operation to determine the vibration control amount. The vibration control amount and the excitation type are taken as the driving signal of the exciter to drive the exciter to carry out corresponding vibration based on the excitation type and the vibration control amount.

[0099] Specifically, the step of performing closed-loop control operation based on the target vibration amount and the current vibration amount to determine the vibration control amount comprises: calculating the difference between the target vibration amount and the current vibration amount; and performing motion compensation on the difference to determine the vibration control amount.

[0100] By simulating various road excitation to reproduce the bench test of the abnormal noise problem of each suspension in the vehicle, the input and output are more stable relative to the whole vehicle road test, which facilitates problem investigation, verification, quantitative comparison test analysis of improvement measures effect, and realization of quantifiable acceptance standard setting.

[0101] In order to enable those skilled in the art to clearly understand the test process of the embodiments of the present application, the following is illustrated by an example:

[0102] For the steady-state signal, the vertical and longitudinal vibration amplitudes and frequencies of the vibration table can be monitored in real time by the acceleration sensors arranged in three directions, and the least square method is used to calculate the difference value compared with the target signal, so as to realize the dynamic compensation of the infinite approximation target signal. For the impact signal, compensation can be performed according to the peak value difference between the actual signal and the target signal, and the after shake (aftershock) response of the engine and the suspension system after being excited by the one-time impact signal of the vibration table is focused on, so as to realize the reproduction of the suspension clatter abnormal sound, knocking abnormal sound, friction abnormal sound and other problems, and the durability, abnormal sound performance evaluation and other tests.

[0103] After the equipment is started, the controller will detect the displacement signal of the vibration table in real time through the displacement sensor to monitor the lowest and highest positions of the vibration table. When the table surface of the vibration table is below a certain height position, the system will automatically inflate to adjust the air pressure of the corresponding air spring to raise the table surface to ensure that it is near zero position, and when it is higher than a certain height position, the system will deflate the corresponding air spring to lower the table surface to ensure that it is near zero position. Then during the vibration test running process, if the vibration amplitude of the vibration table exceeds the set stroke protection range, the system will alarm or pause the test.

[0104] It should be noted that, for the method embodiments, in order to simply describe, they are all expressed as a series of action combinations, but those skilled in the art should know that the embodiments of the present application are not limited by the action sequence described, because according to the embodiments of the present application, certain steps can be performed in other order or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions involved are not necessarily necessary for the embodiments of the present application.

[0105] Referring to Figure 4 , the embodiment of the present application also provides an electronic device, comprising:

[0106] The processor 401 and the storage medium 402, the storage medium 402 stores the computer program executable by the processor 401, when the electronic device runs, the processor 401 executes the computer program, to realize the engine suspension test method as any one of the embodiments of the present application.

[0107] The engine suspension test method is applied to the engine suspension test bench as described above, and the engine suspension test method comprises:

[0108] Obtaining a road spectrum signal;

[0109] Analyzing the road spectrum signal to determine the driving signal of the exciter;

[0110] The support buffer is controlled to start, so that the vibration table and the engine to be tested and the suspension are in a suspended state.

[0111] After the vibration table and the engine to be tested and the suspension are in a suspended state, the controller is controlled to excite the exciter in phase or in reverse phase according to the driving signal.

[0112] Optionally, the step of analyzing the road spectrum signal to determine the driving signal of the exciter comprises:

[0113] The road spectrum signal is analyzed to determine an excitation type and a target vibration amount.

[0114] The current vibration amount of the vibration table is obtained.

[0115] A closed-loop control operation is performed based on the target vibration amount and the current vibration amount to determine a vibration control amount.

[0116] The excitation type and the vibration control amount are determined as the driving signal of the exciter.

[0117] Optionally, the step of performing a closed-loop control operation based on the target vibration amount and the current vibration amount to determine a vibration control amount comprises:

[0118] A difference between the target vibration amount and the current vibration amount is calculated.

[0119] A motion compensation is performed on the difference to determine a vibration control amount.

[0120] The memory can include a random access memory (RAM) and can also include a non-volatile memory such as at least one disk memory. Optionally, the memory can also be at least one storage device located away from the aforementioned processor.

[0121] The aforementioned processor can be a general-purpose processor including a central processing unit (CPU), a network processor (NP), etc., and can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0122] Referring to Figure 5 The embodiment of the present application also provides a computer readable storage medium 501, wherein the storage medium 501 stores a computer program, and the computer program is executed by a processor to apply the engine suspension test method to the engine suspension test bench to obtain the following technical effects.

[0123] Obtaining a road spectrum signal;

[0124] Analyzing the road spectrum signal to determine a driving signal of the exciter;

[0125] Controlling the support buffer to start, so that the vibration table and the engine and suspension to be tested are in a suspended state;

[0126] After the vibration table and the engine and suspension to be tested are in the suspended state, the controller controls the exciter to be excited in phase or in anti-phase according to the driving signal.

[0127] Optionally, the step of analyzing the road spectrum signal to determine the driving signal of the exciter comprises the following steps.

[0128] Analyzing the road spectrum signal to determine an excitation type and a target vibration amount;

[0129] Obtaining a current vibration amount of the vibration table;

[0130] Performing a closed-loop control operation based on the target vibration amount and the current vibration amount to determine a vibration control amount;

[0131] Determining the driving signal of the exciter based on the excitation type and the vibration control amount.

[0132] Optionally, the step of performing the closed-loop control operation based on the target vibration amount and the current vibration amount to determine the vibration control amount comprises the following steps.

[0133] Calculating a difference between the target vibration amount and the current vibration amount;

[0134] Performing motion compensation on the difference to determine the vibration control amount.

[0135] The embodiment of the present application also discloses a test device, comprising the engine suspension test bench.

[0136] The test device is used for testing the engine and the suspension thereof, and records and outputs the test process and results, so that relevant personnel can test and record the engine and the suspension thereof in an integrated manner, and the efficiency of the test is improved.

[0137] The engine suspension test bench comprises a vibration table for restraining and mounting the engine and suspension to be tested;

[0138] A support buffer is arranged below the vibration table and used for supporting the vibration table and the engine and suspension to be tested, so that the vibration table and the engine and suspension to be tested are in a suspended state;

[0139] Exciters are arranged on opposite sides of the vibration table, and the exciters are used for driving the vibration table to vibrate when in-phase excitation or anti-phase excitation is performed, so as to simulate road vibration;

[0140] A controller is connected with the exciters and used for performing in-phase excitation or anti-phase excitation on the exciters.

[0141] Optionally, the exciter comprises:

[0142] An exciter body is arranged below the vibration table, connected with the controller and the vibration table, and used for driving the vibration table to vibrate under the in-phase excitation or anti-phase excitation of the controller.

[0143] Optionally, the exciter further comprises:

[0144] A transmission lever has one end connected with the exciter body and the other end connected with the vibration table, and is used for transmitting vibration of the exciter body.

[0145] Optionally, the exciter further comprises:

[0146] An exciter buffer is arranged on a side of the exciter body away from the vibration table and used for buffering vibration of the exciter body.

[0147] Optionally, the vibration table comprises:

[0148] A cross beam and a longitudinal beam are connected with each other perpendicularly and form a cross structure.

[0149] A suspension support is arranged on the cross beam or the longitudinal beam and used for connecting with the engine and suspension to be tested, so as to fix the engine and suspension to be tested to the cross structure.

[0150] Optionally, the support buffer comprises:

[0151] An air spring is arranged at an intersection position of the cross structure and used for supporting the vibration table and the engine and suspension to be tested.

[0152] Optionally, the engine suspension test bench further comprises:

[0153] An acceleration sensor is fixedly connected with the vibration table and used for detecting an acceleration output signal of the vibration table.

[0154] A displacement sensor is fixedly connected with the vibration table and is configured to detect a position signal of the vibration table in a vertical direction.

[0155] The controller is configured to in-phase excite or anti-phase excite the vibration exciter based on the acceleration output signal and / or the position signal.

[0156] Optionally, the device further comprises:

[0157] A limiting member is connected with the vibration table and is configured to limit a movement range of the vibration table.

[0158] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0159] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, device, or computer program product. Therefore, the embodiments of the present application can be in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments of the present application can be in the form of a computer program product implemented on one or more computer usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

[0160] The embodiments of the present application are described with reference to flowcharts and / or block diagrams according to the method, terminal device (system), and computer program product of the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to produce a machine, so that the instructions executed by the computer or other programmable data processing terminal device produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one flow or multiple flows and / or blocks Figure 1 The device that implements the functions specified in one block or multiple blocks.

[0161] These computer program instructions can also be stored in a computer readable storage medium that can guide the computer or other programmable data processing terminal device to work in a specific way, so that the instructions stored in the computer readable storage medium produce a product including instruction devices that implement the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one flow or multiple flows and / or blocks Figure 1 The device that implements the functions specified in one block or multiple blocks.

[0162] These computer program instructions can also be loaded into a computer or other programmable data processing terminal device, so that a series of operational steps are performed on the computer or other programmable terminal device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable terminal device provide a process for implementing the functions specified in the flowchart Figure 1 one flowchart or multiple flowcharts and / or blocks Figure 1 one flowchart or multiple flowcharts and / or blocks

[0163] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to cover all changes and modifications falling within the scope of the embodiments of the present application.

[0164] Finally, it should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or terminal device including a list of elements does not only include those elements, but also other elements not explicitly listed, or other elements inherent to such a process, method, article, or terminal device. Without more limitations, an element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or terminal device including the said element.

[0165] The above provides a detailed description of an engine suspension test bench, an engine suspension test method, an electronic device, a computer readable storage medium, and a test device. The principles and implementation manners of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges can be changed. In summary, the content of the present description should not be understood as a limitation of the present application.

Claims

1. An engine mount test bench, characterized in that, include: A vibration table is used to constrain and mount the engine under test and its suspension. The support buffer installed below the vibration table is used to support the vibration table, the engine under test and the suspension, so that the vibration table, the engine under test and the suspension are in a suspended state. The exciters are arranged on opposite sides of the vibration table. The exciters are used to drive the vibration table to vibrate when excited in the same phase or out of phase, so as to simulate road vibration. An accelerometer is fixedly connected to the vibration table and is used to detect the acceleration output signal of the vibration table. A displacement sensor, fixedly connected to the vibration table, is used to detect the position signal of the vibration table in the vertical direction; A controller, connected to the exciter, is used to excite the exciter in phase or out of phase based on the acceleration output signal and / or the position signal; The vibration table includes: The horizontal beams and vertical beams are connected perpendicularly to each other to form a grid-like structure; A suspension bracket is provided on the crossbeam or the longitudinal beam for connecting to the engine under test and the suspension, so as to fix the engine under test and the suspension to the grid structure. The supporting buffer includes: An air spring is located at the intersection of the grid-shaped structure to support the vibration table, the engine under test, and the suspension.

2. The engine mount test bench according to claim 1, characterized in that, The exciter includes: The exciter body is located below the vibration table and is connected to the controller and the vibration table. It is used to drive the vibration table to vibrate under in-phase or out-of-phase excitation from the controller.

3. The engine mount test bench according to claim 2, characterized in that, The exciter also includes: The transmission lever is connected at one end to the vibrator body and at the other end to the vibration table, and is used to transmit the vibration of the vibrator body.

4. The engine mount test bench according to any one of claims 2 to 3, characterized in that, The exciter also includes: A vibrator buffer is disposed on the side of the vibrator body away from the vibration table, and is used to buffer the vibration of the vibrator body.

5. The engine mount test bench according to claim 1, characterized in that, Also includes: A limiting component, connected to the vibration table, is used to limit the range of motion of the vibration table.

6. An engine mount testing method, characterized in that, Applied to the engine mount test bench as described in any one of claims 1 to 5, the method comprises: Acquire road spectrum signals; The drive signal of the exciter is determined by analyzing the road spectrum signal; The support buffer is activated to keep the vibration table, the engine under test, and the suspension in a suspended state. After the vibration table, the engine under test, and the suspension are in a suspended state, the controller is controlled to excite the exciter in the same phase or in opposite phase according to the drive signal.

7. The method according to claim 6, characterized in that, The step of analyzing the road spectrum signal to determine the drive signal of the exciter includes: Analyze the road spectrum signal to determine the excitation type and target vibration amount; Obtain the current vibration level of the vibration table; Based on the target vibration amount and the current vibration amount, a closed-loop control calculation is performed to determine the vibration control amount; The excitation type and the vibration control quantity determine the drive signal of the exciter.

8. The method according to claim 7, characterized in that, The step of performing closed-loop control calculations based on the target vibration magnitude and the current vibration magnitude to determine the vibration control magnitude includes: Calculate the difference between the target vibration amount and the current vibration amount; Motion compensation is performed on the difference to determine the vibration control quantity.

9. An electronic device, characterized in that, It includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the steps of the engine mount testing method as described in any one of claims 6 to 8.

10. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, which, when executed by a processor, implements the steps of the engine mount testing method as described in any one of claims 6 to 8.

11. A testing device, characterized in that, Includes the engine mount test bench as described in any one of claims 1 to 5.

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