Engine suspension test bench, method, equipment and storage medium

Abstract

The embodiment of the invention provides an engine suspension test bench, method and equipment and a storage medium, and the test bench comprises a vibration table which is used for constraining and installing a to-be-tested engine and a suspension; the support buffer piece is arranged below the vibration table and is used for supporting the vibration table, the engine to be tested and the suspension so as to enable the vibration table, the engine to be tested and the suspension to be in a suspension state; the vibration exciters are arranged on the two opposite sides of the vibration table, and the vibration exciters are used for driving the vibration table to vibrate during in-phase excitation or anti-phase excitation so as to simulate road vibration; and the controller is connected with the vibration exciter and is used for exciting the vibration exciter in the same phase or in the opposite phase. When the rack is used for testing, the vibration condition performance similar to the pavement can be simulated, and the functions of risk assessment and abnormal sound problem reproduction of the suspension abnormal sound are realized, so that the verification period is shortened, and the test comprehensiveness is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile component 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 testing device. Background Art

[0002] Engine mount abnormal noise mainly refers to a series of abnormal noises caused by the left and right engine mounts or anti-roll bars when the car is driving at low speed on impact roads such as speed bumps, angle steels, potholes, etc. The existing methods to discover and reproduce engine mount abnormal noises require road tests or four-channel vibration tests to be carried out after the samples are installed on the vehicle. The abnormal noise problem is discovered too late, and the improvement of samples and subsequent verification cycles are too long, which cannot guarantee the development and delivery schedule requirements of the vehicle project. Summary of the invention

[0003] In view of the above problems, embodiments of the present invention are proposed to provide an engine mount test bench, an engine mount test method, an electronic device, a computer-readable storage medium and a test device that overcome the above problems or at least partially solve the above problems.

[0004] In order to solve the above problems, in a first aspect of the present invention, an embodiment of the present invention discloses an engine mount test bench, comprising:

[0005] A vibration table, used to restrain and mount the engine and suspension to be tested;

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

[0007] Vibrators disposed on opposite sides of the vibration table, the vibrators being used to drive the vibration table to vibrate when excited in phase or in anti-phase to simulate road vibration;

[0008] A controller is connected to the exciter and is used to excite the exciter in phase or in anti-phase.

[0009] Optionally, the exciter includes:

[0010] The exciter body is arranged below the vibration table, connected to the controller and the vibration table, and is used to drive the vibration table to vibrate under the in-phase excitation or anti-phase excitation of the controller.

[0011] Optionally, the vibration exciter further includes:

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

[0013] Optionally, the vibration exciter further includes:

[0014] The vibration exciter buffer is arranged on a side of the vibration exciter body away from the vibration table, and is used for buffering the vibration of the vibration exciter body.

[0015] Optionally, the vibration table comprises:

[0016] A crossbeam and a longitudinal beam, wherein the crossbeam and the longitudinal beam are vertically connected to each other to form a tic-tac-toe structure;

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

[0018] Optionally, the supporting buffer member comprises:

[0019] The air spring is arranged at the intersection of the tic-tac-toe structure and is used to support the vibration table and the engine to be tested and the suspension.

[0020] Optionally, it also includes:

[0021] An acceleration sensor, fixedly connected to the vibration table, for detecting an acceleration output signal of the vibration table;

[0022] A displacement sensor, fixedly connected to the vibration table, for detecting a position signal of the vibration table in a vertical direction;

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

[0024] Optionally, it also includes:

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

[0026] In a second aspect of the present invention, an embodiment of the present invention discloses an engine mount test method, which is applied to the engine mount test bench as described above, and the method comprises:

[0027] Get the road spectrum signal;

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

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

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

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

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

[0033] Obtaining the 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] The driving signal of the vibration exciter is determined 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 the vibration control amount includes:

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

[0038] Motion compensation is performed on the difference to determine the vibration control amount.

[0039] In a third aspect of the present invention, an embodiment of the present invention discloses an electronic device, comprising a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program implements the engine suspension test method as described above when executed by the processor.

[0040] In a fourth aspect of the present invention, an embodiment of the present invention discloses a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the engine mount test method as described above is implemented.

[0041] In a fourth aspect of the present invention, an embodiment of the present invention discloses a test device, comprising the engine mount test bench as described above.

[0042] The embodiments of the present invention include the following advantages:

[0043] The embodiment of the present invention uses a vibration table to constrain and install the engine and suspension to be tested; a support buffer disposed under the vibration table to support the vibration table, the engine and suspension to be tested, so that the vibration table, the engine and suspension to be tested are in a suspended state; an exciter disposed on opposite sides of the vibration table, the exciter is used to drive the vibration table to vibrate when excited in phase or in reverse phase to simulate road vibration; a controller is connected to the exciter and is used to excite the exciter in phase or in reverse phase. The vibration table is balanced by the support buffer, the vibration table, the engine and suspension to be tested are in a suspended state, the exciter transmits vibration to the vibration table when excited in phase or in reverse phase, so that the engine and suspension to be tested can achieve random motion of six degrees of freedom, so as to fully simulate the expected random vibration response of the engine and suspension to be tested when the whole vehicle is subjected to road impact vibration. Through the test bench, the vibration performance similar to that of the road can be simulated, and the risk assessment of abnormal noise of the suspension and the reproduction function of abnormal noise problem can be realized, so as to shorten the verification cycle and ensure the comprehensiveness of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural perspective diagram of an embodiment of an engine mount test bench of the present invention;

[0045] Figure 2 is a schematic structural perspective diagram of another engine mount test bench embodiment of the present invention;

[0046] Figure 3 is a flow chart of steps of an embodiment of an engine mount test method of the present invention;

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

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

[0049] Explanation of the reference numerals: 100 - vibration table; 110 - cross beam; 120 - longitudinal beam; 130 - suspension bracket; 200 - support buffer; air spring 210; 300 - exciter; 310 - exciter body; 320 - transmission lever; 330 - exciter buffer; 400 - acceleration sensor; 500 - displacement sensor; 600 - limiter; 700 - support block. DETAILED DESCRIPTION

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

[0051] Reference Figure 1, showing a schematic structural perspective diagram of an engine mount test bench embodiment of the present invention; the engine mount test bench comprises:

[0052] A vibration table 100, used to restrain and install the engine and suspension to be tested;

[0053] A support buffer 200 disposed below the vibration table 100 is used to support the vibration table 100 and the engine to be tested and the suspension, so that the vibration table 100 and the engine to be tested and the suspension are in a suspended state;

[0054] The vibration exciters 300 are arranged on two opposite sides of the vibration table 100, and the vibration exciters 300 are used to drive the vibration table 100 to vibrate when being excited in the same phase or in the opposite phase to simulate the road vibration;

[0055] A controller (not shown in the figure) is connected to the exciter 300 and is used to excite the exciter 300 in phase or in anti-phase.

[0056] In the embodiment of the present invention, the engine mount test bench is composed of at least a vibration table 100, a support buffer 200, an exciter 300 and a controller. The vibration table 100 is a support base for constraining and installing the engine and the mount to be tested. That is, the engine and the mount to be tested can be installed on the vibration table 100 according to the constraint conditions and assembly method of installing on the whole vehicle, so that the installation of the actual vehicle can be fully simulated.

[0057] The support buffer 200 is disposed below the vibration table 100, that is, below the installation plane of the vibration table 100 along the vertical direction 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 to simulate the installation situation in a real vehicle, and to avoid the vibration table 100 from interfering with the engine and suspension to be tested and restricting the movement of the engine and suspension to be tested in different degrees of freedom, so that during subsequent vibration, the engine and suspension to be tested can vibrate randomly in six degrees of freedom, so that the engine and suspension to be tested can be fully tested for vibration.

[0058] There are two exciters 300, which are arranged on opposite sides of the vibration table 100, such as the opposite sides of the vibration table 100 in the lateral direction, that is, the left and right sides of the vibration table 100; the two exciters 300 are arranged on the left and right sides of the vibration table 100, respectively simulating the acceleration signals collected on the left and right longitudinal beams 120 of the whole vehicle to excite the left and right sides of the vibration table 100 separately. When the two exciters 300 are excited in the same phase, the vertical movement of the vibration table 100 can be realized, and when the left and right exciters 300 are excited in opposite phases, the longitudinal yaw movement of the engine can be realized. Of course, whether the same phase or opposite phase is required depends on the requirements of different road spectrum signals. For example, the road spectrum of Belgian roads and steel rope roads has a longitudinal component when moving vertically, and requires opposite phase control; for example, angle steel roads, speed bumps, etc. only have vertical excitation, and only need same phase control. After the engine and suspension are stimulated by the simulated road surface of the vibration table 100, they present corresponding states to simulate the amplitude and frequency range of the real road surface excitation.

[0059] Specifically, the exciter 300 includes: an exciter body 310, which is disposed below the vibration table 100 and connected to the controller and the vibration table 100, and is used to drive the vibration table 100 to vibrate under in-phase excitation or anti-phase excitation of the controller.

[0060] The exciter body 310 can be directly disposed below the vibration table 100. Figure 1As shown, it is arranged below the left and right sides of the vibration table 100, mechanically connected to the vibration table 100, and electrically connected to the controller. Under the same phase excitation or anti-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 drive of the electrical signal of the controller to simulate the vibration of the actual road. The working principle of the electromagnetic exciter 300 is based on the principles of electromagnetic induction and vibration. 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 electromagnet 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 it obtains a certain form and size of vibration. The electromagnetic exciter 300 is usually composed of an electromagnet core with a coil and an armature, and a spring is installed between the core and the armature. This structure enables the electromagnetic exciter 300 to maintain a certain stability and elasticity while generating an excitation force. And the use of the electromagnetic exciter 300 has the following advantages: large vibration force: the electromagnetic exciter 300 generates an excitation force through electromagnetic force, and can generate a large vibration force to meet various vibration needs. Adjustable frequency: the vibration frequency and amplitude of the electromagnetic exciter 300 can be easily adjusted by adjusting the frequency and amplitude of the input current. Good stability: the electromagnetic exciter 300 works on the electromagnetic principle and 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 and other environments. Simple maintenance: the structure of the electromagnetic exciter 300 is relatively simple, and maintenance is relatively convenient.

[0061] The controller can be electrically connected to the exciter 300, and excite the exciter 300 in phase or in anti-phase based on different road spectrum signals, so that the exciter 300 can simulate road vibration.

[0062] The embodiment of the present invention uses a vibration table 100 to constrain and install the engine and suspension to be tested; a support buffer 200 arranged below the vibration table 100 is used to support 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; an exciter 300 is arranged on opposite sides of the vibration table 100, and the exciter 300 is used to drive the vibration table 100 to vibrate when excited in phase or in anti-phase to simulate road vibration; a controller is connected to the exciter 300 and is used to excite the exciter 300 in phase or in anti-phase. The vibration table 100 is balanced by supporting the buffer 200, and 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 under in-phase excitation or anti-phase excitation, so that the engine and suspension to be tested can achieve random motion with six degrees of freedom, so as to fully simulate the expected random vibration response of the engine and suspension to be tested when the whole vehicle is subjected to road impact vibration. By testing on the bench, it is possible to simulate vibration conditions similar to those on the road surface, realize risk assessment of abnormal suspension noise and reproduction of abnormal noise problems, so as to shorten the verification cycle and ensure the comprehensiveness of the test.

[0063] Reference Figure 2 , showing a structural perspective diagram of another embodiment of an engine mount test bench of the present invention; the engine mount test bench comprises:

[0064] A vibration table 100, used to restrain and install the engine and suspension to be tested;

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

[0066] The vibration exciters 300 are arranged on two opposite sides of the vibration table 100, and the vibration exciters 300 are used to drive the vibration table 100 to vibrate when being excited in the same phase or in the opposite phase to simulate the road vibration;

[0067] An acceleration sensor 400 is fixedly connected to the vibration table 100 and is used to detect an acceleration output signal of the vibration table 100;

[0068] A displacement sensor 500 is fixedly connected to the vibration table 100 and is used to detect a position signal of the vibration table 100 in a vertical direction;

[0069] A controller connected to the vibration exciter 300, and configured to excite the vibration exciter 300 in phase or in anti-phase based on the acceleration output signal and / or the position signal;

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

[0071] In an embodiment of the present invention, the engine mount test bench may include a vibration table 100 , a support buffer 200 , an exciter 300 , an acceleration sensor 400 , a displacement sensor 500 , a controller, and a limiter 600 .

[0072] The vibration table 100 is used to constrain and install the engine and suspension to be tested. So that the engine and suspension to be tested can be installed in the test bench based on the assembly conditions on the whole vehicle. The vibration table 100 can suspend the bracket 130, the crossbeam 110 and the longitudinal beam 120, and the crossbeam 110 and the longitudinal beam 120 are vertically connected to each other to form a tic-tac-toe structure; the suspension bracket 130 is arranged on the crossbeam 110 or the longitudinal beam 120, and is used to connect with the engine and suspension to be tested, so as to fix the engine and suspension to be tested to the tic-tac-toe structure. The engine and suspension are stabilized and effectively simulated on the actual vehicle by the suspension bracket 130, the crossbeam 110 and the longitudinal beam 120 to improve the accuracy of the test. And by arranging the vibration table 100 in a tic-tac-toe structure, the stability of the vibration table 100 can be improved, and the installation environment of the simulated engine and suspension on the vehicle can be realized.

[0073] The support buffer 200 is arranged below the vibration table 100, 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. Specifically, the support buffer 200 includes: an air spring 210, which is arranged at the intersection of the tic-tac-toe structure, and is used to support the vibration table 100 and the engine and suspension to be tested. The supporting force of the air spring 210 has a nonlinear characteristic, and the air pressure of each air spring 210 can be individually controlled 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 a suspended state together with the vibration table 100, so as to generate random vibrations when excited by the exciter 300. The air spring 210 is used to support the mass of the engine and suspension to be tested, and its certain elasticity is used to ensure the relative movement of the test stand, thereby realizing a flexible connection. The air spring 210 can be arranged at the intersection of the tic-tac-toe structure, that is, Figure 2 As shown, it can be arranged at four corners so as to provide stable support.

[0074] In addition, in order to fix the air spring 210 , an air spring 210 bracket may be provided at the bottom of the air spring 210 for installing and fixing the air spring 210 .

[0075] There may be two exciters 300, which are respectively arranged on opposite sides of the vibration table 100. When the exciters 300 are excited in the same phase or in the opposite phase, they drive the vibration table 100 to vibrate to simulate road vibration. Specifically, the exciter body 310 is arranged on the side of the support buffer 200 away from the vibration table 100; the exciter 300 includes: the exciter body 310, which is arranged below the vibration table 100 and connected to the controller and the vibration table 100, and is used to drive the vibration table 100 to vibrate under the same phase excitation or the opposite phase excitation of the controller; a transmission lever 320, one end of which is connected to the exciter body 310 and the other end is connected to the vibration table 100, and is used to transmit the vibration of the exciter body 310; the exciter buffer 330 is arranged on the side of the exciter body 310 away from the vibration table 100, and is used to buffer the vibration of the exciter body 310.

[0076] The exciter 300 can be arranged directly below the vibration table 100 to directly drive the vibration table 100 to vibrate, or it can be arranged on a side of the support buffer 200 away from the vibration table 100, such as Figure 2 As shown, the exciter 300 is arranged on the outside of the vibration table 100. The corresponding exciter body 310 is arranged on the outside of the vibration table 100. The exciter body 310 can be an electromagnetic exciter 300. The exciter body 310 is connected to one end of the transmission lever 320, and the other end of the transmission lever 320 is connected to the vibration table 100. When the exciter body 310 vibrates, the vibration is transmitted to the vibration table 100 to make the vibration table 100 vibrate. And an exciter buffer 330 can be set on the side of the exciter body 310 away from the vibration table 100, and the vibration of the exciter body is buffered by the exciter buffer 330 to avoid transmission to the ground and other damages to the stand. Among them, the exciter buffer 330 can also use an air spring 210, so that the air pressure can be used for buffering with adjustable buffering force, and it has a similar structure to the support buffer 200, which is convenient for maintenance and makes the structure more compact.

[0077] Furthermore, a single exciter body 310 can achieve a maximum output of different excitation forces of 1000-5000N. The excitation force is calculated according to the mass of the system, and the exciter 300 of the corresponding specifications is selected. For example, if the total mass of the engine and the suspension to be tested is 100kg (kilograms), then if you want to achieve 1g acceleration excitation, the required exciter 300 specifications are at least

[0078] F=ma+mg=100*9.8m / s 2 +100*9.8m / s 2=1960N (Newton), that is, at least two 1000N exciters 300 are required to drive. Usually, when driving a large mass of the test piece, the driving force needs to have a certain margin. You can choose an exciter 300 that is 1.5-2 times the required thrust to ensure the accuracy of the path spectrum reproduction.

[0079] In addition, in order to fix various parts of the vibration exciter 300 , a vibration exciter 300 bracket may be provided to install and fix the vibration exciter 300 and the vibration exciter buffer 330 .

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

[0081] The displacement sensor 500 is fixedly connected to the vibration table 100, and one can be set on the left and right sides of the vibration table 100 respectively for detecting the position signal of the vibration table 100 in the vertical direction; by monitoring the lowest and highest positions of the vibration table 100 surface, the controller will determine when to inflate and deflate the four air springs 210 of the table according to the signal of the photoelectric displacement sensor 500 to ensure that the table always remains in the zero-position equilibrium position; when the dynamic displacement exceeds the set limit position, the device can also be alarmed or shut down to ensure that the device will not be damaged when the table vibration is out of control.

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

[0083] The limiter 600 is connected to the vibration table 100 and is used to limit the range of motion of the vibration table 100. The limiter 600 may be a limiter spring, which is a leaf spring that bends and torsional deforms in the direction of motion. By supporting the vibration table 100 and limiting other non-motion directions, the vibration table 100 is prevented from over-responding and causing uncontrolled motion when excited by the exciter 300.

[0084] In addition, in order to fix the limiting member 600 , a limiting member 600 bracket may be provided to fix the limiting member 600 .

[0085] Furthermore, in order to avoid failure of the support buffer 200, such as damage to the exciter 300 caused by the sinking of the rear frame after deflation, a support block 700 can be set between the vibration table 100 and the exciter 300. The support block 700 is used to provide hard support to the vibration table 100 and the engine and suspension to be tested after the test is stopped, so as to avoid damage to the exciter 300 caused by failure of the support buffer 200.

[0086] In an embodiment of the present invention, the left and right engine mounts and the rear mount can be subjected to abnormal noise bench vibration tests at the same time, which shortens the design verification and product verification cycle, saves later development costs, and enables the abnormal noise verification test of the suspension to be advanced from vehicle-level verification to component-level verification, reducing the risk of abnormal noise in the development stage; and various road excitations can be simulated to reproduce the abnormal noise problems of each suspension on the bench, and the input and output are more stable than those of the whole vehicle road test, which is convenient for problem investigation and verification, quantitative comparative test analysis of the effects of improvement measures, and the formulation of quantifiable acceptance standards.

[0087] Reference Figure 3 , shows a flow chart of steps of an engine mount test method embodiment of the present invention, which may specifically include the following steps:

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

[0089] According to the test requirements, a road spectrum signal may be obtained, including but not limited to a road spectrum signal corresponding to a random steady-state PSD road spectrum and 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 a power spectral density curve that describes the road surface roughness or other random vibration input characteristics under the condition of a stable random signal. The periodic or deterministic impact time history road spectrum refers to the existence of impact responses in the signal with a certain fixed frequency or period, and the time history and amplitude of these impact responses are determined or predictable.

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

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

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

[0094] Then, when testing is required, the support buffer can be started first, and the vibration table, the engine to be tested and the suspension are supported by the support buffer, so that the vibration table, the engine to be tested and the suspension are in a suspended state.

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

[0096] After the vibration table and the engine and suspension to be tested are in a suspended state, the corresponding vibration test can be carried out. According to the driving signal, the controller in the control frame sends a driving signal to excite the exciter in phase or in opposite phase, so that the exciter vibrates accordingly under the same phase excitation or in opposite phase excitation to simulate the vibration of the vehicle.

[0097] In an optional embodiment of the present invention, the step of parsing the road spectrum signal to determine the driving signal of the exciter includes: parsing 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 operations 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] The determination of the driving signal can be carried out through closed-loop control. First, the road spectrum signal can be analyzed to determine the required excitation type and target vibration amount. The target vibration amount includes the target vibration rate and vibration amplitude, etc. The excitation type can be in-phase excitation or anti-phase excitation. Then obtain the current vibration amount of the vibration table, and the current vibration can be determined by the acceleration output signal detected by the acceleration sensor. Then use the target vibration amount as the target value and the current vibration amount as the feedback value to perform closed-loop control operations to determine the vibration control amount. The vibration control amount and the excitation type are used as the driving signal of the exciter to drive the exciter to achieve corresponding vibrations 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 includes: calculating the difference between the target vibration amount and the current vibration amount; performing motion compensation on the difference to determine the vibration control amount.

[0100] By simulating various road excitations, the abnormal noise problems of various suspension vehicles are reproduced on the bench. The input and output are more stable than those of the whole vehicle road test, which is convenient for problem investigation and verification, quantitative comparative test and analysis of the effects of improvement measures, and the formulation of quantifiable acceptance standards.

[0101] In order to make the testing process of the embodiment of the present invention clear to those skilled in the art, an example is used to illustrate the following:

[0102] For steady-state signals, the vibration amplitude and frequency in the vertical and longitudinal directions of the vibration table can be monitored in real time through acceleration sensors set in three directions, and the difference can be calculated by comparing with the target signal using the least squares method to achieve dynamic compensation that infinitely approaches the target signal. For impact signals, compensation can be made based on the peak difference between the actual signal and the target signal, with a focus on the after shake response of the engine and suspension system after being stimulated by an impact signal from the vibration table, to achieve the reproduction of problems such as suspension clatter noise, knocking noise, friction noise, and durability and noise performance evaluation tests.

[0103] After the equipment is turned on, 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 top of the vibration table is below a certain height, the system will automatically inflate and adjust the air pressure of the corresponding air spring to raise the table top to ensure that it is near zero. When it is above a certain height, the system will deflate the corresponding air spring to lower the table top to ensure that it is near zero. Then, during the vibration test, if the vibration amplitude of the vibration table exceeds the set travel protection range, the system will alarm or suspend the test.

[0104] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0105] Reference Figure 4 , an embodiment of the present invention further provides an electronic device, including:

[0106] A processor 401 and a storage medium 402, wherein the storage medium 402 stores a computer program executable by the processor 401, and when the electronic device is running, the processor 401 executes the computer program to implement the engine mount test method as described in any one of the embodiments of the present invention.

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

[0108] Get the road spectrum signal;

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

[0110] Controlling the support buffer to start, so that the vibration table, the engine to be tested and the suspension are in a suspended state;

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

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

[0113] Analyze the road spectrum signal to determine the excitation type and target vibration amount;

[0114] Obtaining the current vibration amount of the vibration table;

[0115] Performing a closed-loop control operation based on the target vibration amount and the current vibration amount to determine a vibration control amount;

[0116] The driving signal of the vibration exciter is determined based on the excitation type and the vibration control amount.

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

[0118] Calculating a difference between the target vibration amount and the current vibration amount;

[0119] Motion compensation is performed on the difference to determine the vibration control amount.

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

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

[0122] Reference Figure 5 The embodiment of the present invention further provides a computer-readable storage medium 501, on which a computer program is stored. When the computer program is executed by a processor, the engine mount test method as described in any one of the embodiments of the present invention is applied to the engine mount test bench as described above, and the engine mount test method includes:

[0123] Get the road spectrum signal;

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

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

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

[0127] Optionally, the step of analyzing the road spectrum signal to determine the driving signal of the exciter includes:

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

[0129] Obtaining the 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] The driving signal of the vibration exciter is determined based on the excitation type and the vibration control amount.

[0132] Optionally, the step of performing a closed-loop control operation based on the target vibration amount and the current vibration amount to determine the vibration control amount includes:

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

[0134] Motion compensation is performed on the difference to determine the vibration control amount.

[0135] An embodiment of the present invention further discloses a testing device, comprising the engine suspension test bench as described above.

[0136] The engine and its suspension can be tested by the test equipment, and the test process and results can be recorded and output, so that relevant personnel can fully test and record the engine and its suspension through the test equipment, thereby improving the efficiency of the test.

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

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

[0139] Vibrators disposed on opposite sides of the vibration table, the vibrators being used to drive the vibration table to vibrate when excited in phase or in anti-phase to simulate road vibration;

[0140] A controller is connected to the exciter and is used to excite the exciter in phase or in anti-phase.

[0141] Optionally, the exciter includes:

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

[0143] Optionally, the vibration exciter further includes:

[0144] A transmission lever, one end of which is connected to the vibration exciter body and the other end of which is connected to the vibration table, is used to transmit the vibration of the vibration exciter body.

[0145] Optionally, the vibration exciter further includes:

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

[0147] Optionally, the vibration table comprises:

[0148] A crossbeam and a longitudinal beam, wherein the crossbeam and the longitudinal beam are vertically connected to each other to form a tic-tac-toe structure;

[0149] The suspension bracket is arranged on the cross beam or the longitudinal beam and is used to be connected with the engine to be tested and the suspension, so as to fix the engine to be tested and the suspension to the criss-cross structure.

[0150] Optionally, the supporting buffer member comprises:

[0151] The air spring is arranged at the intersection of the tic-tac-toe structure and is used to support the vibration table and the engine to be tested and the suspension.

[0152] Optionally, it also includes:

[0153] An acceleration sensor, fixedly connected to the vibration table, for detecting an acceleration output signal of the vibration table;

[0154] A displacement sensor, fixedly connected to the vibration table, for detecting a position signal of the vibration table in a vertical direction;

[0155] The controller is used for exciting the exciter in phase or in anti-phase based on the acceleration output signal and / or the position signal.

[0156] Optionally, it also includes:

[0157] A limiter is connected to the vibration table and is used to limit the movement range of the vibration table.

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

[0159] It will be appreciated by those skilled in the art that the embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0160] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0161] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0162] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0163] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0164] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0165] An engine mount test bench, an engine mount test method, an electronic device, a computer-readable storage medium and a test device provided by the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for a person skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An engine mount test bench, characterized in that: include: A vibration table, used to restrain and mount the engine and suspension to be tested; A supporting buffer member disposed below the vibration table, used to support the vibration table, the engine to be tested, and the suspension, so that the vibration table, the engine to be tested, and the suspension are in a suspended state; Vibrators disposed on opposite sides of the vibration table, the vibrators being used to drive the vibration table to vibrate when excited in phase or in anti-phase to simulate road vibration; A controller is connected to the exciter and is used to excite the exciter in phase or in anti-phase.

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

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

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

5. The engine mount test bench according to claim 1, characterized in that: The vibration table comprises: A crossbeam and a longitudinal beam, wherein the crossbeam and the longitudinal beam are vertically connected to each other to form a tic-tac-toe structure; The suspension bracket is arranged on the cross beam or the longitudinal beam and is used to be connected with the engine to be tested and the suspension, so as to fix the engine to be tested and the suspension to the criss-cross structure.

6. The engine mount test bench according to claim 5, characterized in that: The supporting buffer member comprises: The air spring is arranged at the intersection of the tic-tac-toe structure and is used to support the vibration table and the engine to be tested and the suspension.

7. The engine mount test bench according to claim 1, characterized in that: Also includes: An acceleration sensor, fixedly connected to the vibration table, for detecting an acceleration output signal of the vibration table; A displacement sensor, fixedly connected to the vibration table, for detecting a position signal of the vibration table in a vertical direction; The controller is used for exciting the exciter in phase or in anti-phase based on the acceleration output signal and / or the position signal.

8. The engine mount test bench according to claim 1, characterized in that: Also includes: A limiter is connected to the vibration table and is used to limit the movement range of the vibration table.

9. An engine mount test method, characterized in that: Applied to the engine mount test bench according to any one of claims 1 to 8, the method comprises: Get the road spectrum signal; Analyzing the path spectrum signal to determine the driving signal of the exciter; Controlling the support buffer to start, so that the vibration table, the engine to be tested and the suspension are in a suspended state; After the vibration table, the engine to be tested and the suspension are in a suspended state, the controller is controlled according to the driving signal to excite the exciter in phase or in anti-phase.

10. The method according to claim 9, characterized in that The step of analyzing the road spectrum signal to determine the driving signal of the exciter comprises: Analyze the road spectrum signal to determine the excitation type and target vibration amount; Obtaining the current vibration amount of the vibration table; Performing a closed-loop control operation based on the target vibration amount and the current vibration amount to determine a vibration control amount; The driving signal of the vibration exciter is determined based on the excitation type and the vibration control amount.

11. The method according to claim 10, characterized in that The step of performing a closed-loop control operation based on the target vibration amount and the current vibration amount to determine the vibration control amount comprises: Calculating a difference between the target vibration amount and the current vibration amount; Motion compensation is performed on the difference to determine the vibration control amount.

12. An electronic device, characterized in that: The invention comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the steps of the engine mount test method according to any one of claims 9 to 11 are implemented.

13. A computer-readable storage medium, characterized in that: The computer readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the engine mount test method according to any one of claims 9 to 11 are implemented.

14. A testing device, characterized in that: The invention comprises an engine mount test bench as claimed in any one of claims 1 to 8.

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