Suspension test system
By designing a suspension testing system and utilizing a multi-directional loading device and control module, the problem of limited applicability of existing testing systems was solved, enabling diversified testing and verification of real suspension systems, thus improving the richness and accuracy of the tests.
Patent Information
- Application Number
- CN202520369362.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-03-04
AI Technical Summary
Existing active suspension system testing schemes have limited applicability and cannot meet diverse testing needs, especially in bench-level verification.
A suspension testing system was designed, including a base assembly, an equivalent suspension to be tested, a first loading device, a second loading device, a third loading device, and a control module. These devices can apply excitation loads in three directions simultaneously or individually to meet various testing requirements.
It achieves diversified applicability of suspension testing system, enabling various tests, including verification of suspension physical entities and algorithm models, supporting testing of real suspension systems, and improving the richness and accuracy of tests.
Smart Images
Figure CN223742015U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of vehicle detection, in particular to a suspension test system. BACKGROUND
[0002] The suspension system is one of the important systems on the automobile. With the acceleration of the electrification and intelligentization of automobiles, the application of active suspension systems is becoming more and more common. At present, the verification of active suspension systems is mainly at the vehicle level, and there are few bench system level verifications. In the existing active suspension test scheme, most of them only build a simple suspension test model, and the applicability of the test system is relatively single, which cannot meet the diversified test requirements. CONTENT OF THE UTILITY MODEL
[0003] The present application provides a suspension test system to solve the above technical problems.
[0004] The embodiments of the present application are implemented as follows:
[0005] A suspension test system, comprising a base assembly, an equivalent suspension to be tested, a first loading device, a second loading device, a third loading device and a control module. The base assembly comprises a support assembly and a suspension mounting assembly, and the suspension mounting assembly is arranged on one side of the support assembly. The equivalent suspension to be tested is connected to the suspension mounting assembly. The first loading device is arranged on one side of the equivalent suspension to be tested along a first direction. The second loading device is arranged on one side of the equivalent suspension to be tested along a second direction, and the second loading device is arranged opposite to the base assembly. The third loading device supports the equivalent suspension to be tested along a third direction, and the third loading device is located between the second loading device and the base assembly. The first direction, the second direction and the third direction are perpendicular to each other. The control module is communicatively connected to the base assembly, the equivalent suspension to be tested, the first loading device, the second loading device and the third loading device.
[0006] In this way, in the suspension test system of the present application, the first loading device, the second loading device and the third loading device can simultaneously or individually apply excitation loads in three directions to the equivalent suspension to be tested according to the test requirements, meet various test requirements, and enrich the applicability of the test system.
[0007] In one possible implementation: the suspension mounting assembly comprises a suspension guide rail, a plurality of suspension sliding blocks and a suspension mounting panel, the suspension guide rail is connected to one side of the support assembly, the suspension sliding blocks are movably connected to the suspension guide rail, and the suspension mounting panel is connected to a part of the plurality of suspension sliding blocks. The equivalent suspension to be tested is connected to the suspension mounting panel and another part of the plurality of suspension sliding blocks.
[0008] In one possible implementation: the suspension mounting assembly further comprises a limiting piece, the limiting piece is detachably arranged on the support assembly, and the limiting piece abuts against the suspension mounting panel or is spaced apart from the suspension mounting panel.
[0009] In a possible implementation: the suspension mounting assembly further comprises a counterweight, which is detachably arranged on the suspension mounting panel.
[0010] In a possible implementation: the first loading device comprises a first base, a first actuator, a first transmission member and a first loading rod, the first actuator is arranged on one side of the first base, an output end of the first actuator is connected to the first transmission member, the first transmission member is mounted on the first base, the first loading rod is arranged in a first direction, one end of the first loading rod is connected to the first transmission member, and the other end of the first loading rod is used to output an excitation load in the first direction to the equivalent suspension to be tested.
[0011] In a possible implementation: the first actuator is arranged in a third direction, the first transmission member comprises a first connecting end, a second connecting end and a third connecting end, the first connecting end, the second connecting end and the third connecting end are in a triangular distribution, the first connecting end is rotatably connected to the output end of the first actuator, the second connecting end is rotatably connected to the first base, and the third connecting end is rotatably connected to the first loading rod.
[0012] In a possible implementation: the second loading device comprises a second base, a second actuator, a second transmission member and a second loading rod, the second actuator is arranged on one side of the second base, an output end of the second actuator is connected to the second transmission member, the second transmission member is mounted on the second base, the second loading rod is arranged in a second direction, one end of the second loading rod is connected to the second transmission member, and the other end of the second loading rod is used to output an excitation load in the second direction to the equivalent suspension to be tested.
[0013] In a possible implementation: the third loading device comprises a third base, a third actuator, a support panel, a guide rod mechanism and a bearing mechanism, the bearing mechanism is mounted on one side of the third base, the guide rod mechanism is arranged in a third direction and is in sliding connection with the bearing mechanism, one end of the guide rod mechanism is fixedly connected to the support panel, the third actuator is arranged on the side of the third base provided with the bearing mechanism, an output end of the third actuator is connected to the support panel, and the support panel supports the equivalent suspension to be tested and is used to output an excitation load in the third direction to the equivalent suspension to be tested.
[0014] In a possible implementation: the suspension test system further comprises a tray assembly, the tray assembly comprises a mounting plate, a first guide rail, a first sliding block, a sliding block connecting plate, a second sliding block, a second guide rail and a tray, the mounting plate is fixedly connected with the support panel, the tray is oppositely arranged with the mounting plate, the side of the tray away from the mounting plate supports the equivalent suspension to be tested, the first guide rail is installed on the side of the tray facing the mounting plate, and the first guide rail is arranged along a first direction, the second guide rail is installed on the side of the mounting plate facing the tray, and the second guide rail is arranged along a second direction, the first sliding block is slidingly connected with the first guide rail, the second sliding block is slidingly connected with the second guide rail, and the sliding block connecting plate is fixedly connected with the first sliding block and the second sliding block. The tray is drivingly connected with the first loading device along the first direction, and the tray is drivingly connected with the second loading device along the second direction.
[0015] In a possible implementation: the side of the tray away from the mounting plate is further provided with a road surface equivalent panel.
[0016] In a possible implementation: the equivalent suspension to be tested comprises a damping assembly, a frame assembly and a wheel, the wheel is connected with the damping assembly and the frame assembly, the damping assembly is connected with a suspension mounting panel, the suspension mounting panel and the frame assembly are connected with a suspension sliding block, and the third loading device supports the wheel. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0018] Figure 1 FIG. 1 is a structural schematic diagram of a suspension test system according to an embodiment of the present application.
[0019] Figure 2 FIG. 2 is a structural schematic diagram of a base assembly of the suspension test system shown in FIG. 1. Figure 1
[0020] FIG. 3 is an enlarged view of a partial structure of the base assembly shown in FIG. 2. Figure 3 Figure 2 FIG. 4 is a structural schematic diagram of a first loading device of the suspension test system shown in FIG. 1.
[0021] Figure 4 Figure 1 FIG. 5 is a structural schematic diagram of a second loading device of the suspension test system shown in FIG. 1.
[0022] Figure 5 FIG. 6 is a structural schematic diagram of a third loading device of the suspension test system shown in FIG. 1. Figure 1
[0023] FIG. 7 is a structural schematic diagram of a fourth loading device of the suspension test system shown in FIG. 1. Figure 6 Figure 1 Structure diagram of the third loading device of the suspension test system shown.
[0024] Figure 7 For Figure 6 Structure diagram of the third loading device shown in another direction.
[0025] Figure 8 For Figure 1 Exploded view of the tray structure of the suspension test system shown.
[0026] Figure 9 For Figure 8 Structure diagram of part of the tray structure shown in another direction.
[0027] Figure 10 For Figure 9 Structure diagram of the structure shown in another direction.
[0028] Figure 11 For Figure 1 Structure diagram of the equivalent suspension to be tested of the suspension test system shown.
[0029] Figure 12 For Figure 11 Structure diagram of the equivalent suspension to be tested shown in another direction.
[0030] Figure 13 For Figure 1 Structure diagram of the control module of the suspension test system shown.
[0031] Figure 14 Control logic diagram of the suspension test system.
[0032] Figure 15 Verification flowchart of the suspension test system.
[0033] Main element symbol explanation:
[0034] Suspension test system 100,
[0035] Base assembly 1, support assembly 11, support plate 111, suspension mounting assembly 12, suspension guide rail 121, suspension sliding block 122, suspension mounting panel 123, limiting piece 124, counterweight 125,
[0036] Equivalent suspension to be tested 2, damping assembly 21, vehicle frame assembly 22, vehicle wheel 23, front mounting assembly 24, rear mounting assembly 25, tower seat mounting assembly 26,
[0037] First loading device 3, first base 31, first actuator 32, first transmission piece 33, first connection end 331, second connection end 332, third connection end 333, first loading rod 34,
[0038] Second loading device 4, second base 41, second actuator 42, second transmission member 43, second loading rod 44,
[0039] Third loading device 5, third base 51, third actuator 52, support panel 53, guide rod mechanism 54, bearing mechanism 55,
[0040] Control module 6, industrial computer 61, controller 62, host computer 63, power distribution unit 64, control power supply 65,
[0041] Tray assembly 7, mounting plate 71, first guide rail 72, first sliding block 73, sliding block connecting plate 74, second sliding block 75, second guide rail 76, tray 77, road surface equivalent panel 78,
[0042] The following detailed description will further describe the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION
[0043] The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.
[0044] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.
[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0046] Some embodiments of the present application are described in detail. The following embodiments and features in the embodiments can be combined with each other without conflict.
[0047] Please refer to Figure 1Embodiments of the present application provide a suspension test system 100, which comprises a base assembly 1, an equivalent suspension to be tested 2, a first loading device 3, a second loading device 4, a third loading device 5 and a control module 6. The base assembly 1 comprises a support assembly 11 and a suspension mounting assembly 12, and the suspension mounting assembly 12 is arranged on one side of the support assembly 11. The equivalent suspension to be tested 2 is connected to the suspension mounting assembly 12. The first loading device 3 is arranged on one side of the equivalent suspension to be tested 2 along a first direction X. The second loading device 4 is arranged on one side of the equivalent suspension to be tested 2 along a second direction Y, and the second loading device 4 is arranged opposite to the base assembly 1. The third loading device 5 supports the equivalent suspension to be tested 2 along a third direction Z, and the third loading device 5 is located between the second loading device 4 and the base assembly 1. The first direction X, the second direction Y and the third direction Z are perpendicular to each other. The control module 6 is communicatively connected to the base assembly 1, the equivalent suspension to be tested 2, the first loading device 3, the second loading device 4 and the third loading device 5, and is used to control the movement of each part, detect and process test data.
[0048] In practical applications, the first direction X, the second direction Y and the third direction Z can be the longitudinal direction, the lateral direction and the vertical direction of the vehicle respectively. In the suspension test system 100 of the present application, the first loading device 3, the second loading device 4 and the third loading device 5 can simultaneously or individually apply excitation loads in three directions to the equivalent suspension to be tested 2 according to test requirements, thereby meeting various test requirements. The equivalent suspension to be tested 2 can also be a real suspension system, which can be a quarter active suspension in particular, and other types of suspensions can also be used in other embodiments. Using a real suspension system not only enables verification of an active suspension algorithm model, but also enables verification of a physical suspension entity.
[0049] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments, the suspension mounting assembly 12 in the base assembly 1 comprises a suspension guide rail 121, a plurality of suspension sliders 122 and a suspension mounting panel 123, the suspension guide rail 121 is connected to one side of the support assembly 11, the suspension sliders 122 are movably connected to the suspension guide rail 121, and the suspension mounting panel 123 is connected to a part of the plurality of suspension sliders 122. The equivalent suspension to be tested 2 is connected to the suspension mounting panel 123 and another part of the plurality of suspension sliders 122.
[0050] Specifically, the support assembly 11 can be a triangular support structure, which can provide stable support force and is not easy to sway and collapse. The support assembly 11 is provided with a support plate 111 on the side facing the equivalent suspension to be tested 2. The support plate 111 is substantially a square vertical panel, which is used to connect the suspension mounting assembly 12 and provide sufficient mounting position for the suspension mounting assembly 12.
[0051] In the embodiments of this application, the suspension guide rail 121 is fixedly installed on the support plate 111, and the suspension guide rail 121 is arranged along the third direction Z. The suspension guide rail 121 can be a linear guide rail with an "I" shaped cross-section. The suspension slider 122 can be a rectangular slider whose sliding surface fits with the suspension guide rail 121. The surface of the suspension mounting panel 123 can be provided with multiple mounting holes for assembling the equivalent suspension 2 to be tested. There can be two suspension guide rails 121, both of which are fixedly installed on the support plate 111 along the third direction Z, and the two suspension guide rails 121 are spaced apart along the first direction X. Each suspension guide rail 121 can be provided with two or more suspension sliders 122, and the number of suspension sliders 122 on each suspension guide rail 121 is the same. In other embodiments, the number of suspension guide rails 121 may be one, with multiple suspension sliders 122 mounted on the suspension guide rail 121. One or more suspension sliders 122 are connected to the suspension mounting panel 123, and another one or more suspension sliders 122 are connected to a portion of the equivalent suspension 2 to be tested. In other embodiments, the number of suspension guide rails 121 may be more than two, and the number of suspension sliders 122 on each suspension guide rail 121 may be different, as long as the test requirements are met. This application does not limit this.
[0052] Please see Figure 1 , Figure 2 , Figure 11 and Figure 12 In one possible implementation, the equivalent suspension 2 to be tested includes a damping assembly 21, a frame assembly 22, and a wheel 23. The wheel 23 connects the damping assembly 21 and the frame assembly 22. The damping assembly 21 connects to the suspension mounting panel 123. The suspension mounting panel 123 and the frame assembly 22 connect to the suspension slider 122. A third loading device 5 supports the wheel 23. The damping assembly 21 can be a real shock absorber, spring, and its accessories, including but not limited to conventional suspension structures such as suspension springs, shock absorbers, suspension motors, various control arm links, steering knuckles, steering tie rods, brake discs, and brake calipers. The wheel 23 can be a real wheel with tires and normal tire pressure. The frame assembly 22 can be an equivalent component modified from a subframe, with its suspension mounting hardpoints consistent with those of the actual vehicle.
[0053] Furthermore, the equivalent suspension 2 to be tested also includes a tower mount assembly 26, a front mount assembly 24, and a rear mount assembly 25. The tower mount assembly 26 is located at the end of the damper assembly 21 furthest from the wheel 23, and is used to connect the suspension mounting panel 123 and the damper assembly 21. The front mount assembly 24 and the rear mount assembly 25 are respectively located at both ends of the frame assembly 22 along the first direction X, and are used to connect the suspension slider 122 and the frame assembly 22. The tower mount assembly 26, the front mount assembly 24, and the rear mount assembly 25 are all equivalent components of the connection point between the vehicle body and the suspension.
[0054] Please refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments, the suspension mounting assembly 12 further comprises limiters 124 which are detachably arranged on the support assembly 11, and abut against or are spaced apart from the suspension mounting panel 123. Specifically, the limiters 124 are arranged on the support plate 111 and are located at the side edges of the suspension rail 121. At least two limiters 124 are oppositely arranged along the third direction Z, so that the suspension mounting assembly 12 is located between the at least two limiters 124. When the inertia reaction force mode test is required to be performed, the limiters 124 are spaced apart from the suspension mounting panel 123, and preferably, the limiters 124 are arranged at the end of the suspension rail 121, so that the suspension mounting panel 123 has sufficient moving space, thereby allowing the vehicle body end of the equivalent suspension 2 to be tested to be in a floating state and have sufficient up-down moving space. When the fixed reaction force mode test is required to be performed, the limiters 124 abut against the upper and lower ends of the suspension mounting panel 123, so as to abut against and limit the suspension mounting panel 123, thereby achieving the effect of fixing the vehicle body end of the equivalent suspension 2 to be tested. In other embodiments, the limiter 124 can also be one, which can be connected to the suspension mounting panel 123 through fasteners, buckles or other structures, so as to fix the position of the suspension mounting panel 123 in the fixed reaction force mode.
[0055] In some embodiments, the suspension mounting assembly 12 further comprises a counterweight 125 which is detachably arranged on the suspension mounting panel 123. The counterweight 125 can be a rectangular plate with mounting holes, and the weight and number thereof can be replaced and adjusted according to requirements, so as to match the actual vehicle body weight load, thereby being beneficial to improving the authenticity of test results.
[0056] Please refer to Figure 1 and Figure 4 In some embodiments, the first loading device 3 comprises a first base 31, a first actuator 32, a first transmission member 33 and a first loading rod 34. The first actuator 32 is arranged on one side of the first base 31, the output end of the first actuator 32 is connected to the first transmission member 33, the first transmission member 33 is arranged on the first base 31, the first loading rod 34 is arranged along the first direction X, one end of the first loading rod 34 is connected to the first transmission member 33, and the other end of the first loading rod 34 is used to output the excitation load along the first direction X to the equivalent suspension 2 to be tested.
[0057] In a possible implementation, the first actuator 32 can be a linear hydraulic actuator, and both ends thereof are provided with a spherical hinge connecting assembly. The first actuator 32 is arranged along the third direction Z and located at a side of the first base 31 away from the equivalent suspension 2 to be tested. The first base 31 can be a rectangular perforated column. The lower end of the first actuator 32 is connected with a fixed seat through a spherical hinge connecting assembly, and the fixed seat is fixed relative to the position of the first base 31. The first transmission member 33 includes a first connecting end 331, a second connecting end 332 and a third connecting end 333, which are triangularly distributed, and the first transmission member 33 is substantially a triangular arm structure. The first connecting end 331 is rotationally connected with the output end, i.e., the upper end, of the first actuator 32. The second connecting end 332 is rotationally connected with the first base 31, and the third connecting end 333 is rotationally connected with the first loading rod 34. The first loading rod 34 can be a cylindrical rod provided with spherical hinges at both ends. In this way, when the first actuator 32 is extended or retracted, the first loading rod 34 can be driven by the first transmission member 33 to move reciprocatingly along the first direction X, so as to output an excitation load along the first direction X to the equivalent suspension 2 to be tested. The first direction X is the longitudinal direction of the vehicle, and when the first loading device 3 applies a longitudinal input, the rolling direction of the wheel 23 can be locked by the brake caliper, so as to increase the effect of the longitudinal input.
[0058] Referring to Figure 1 and Figure 5 , in some embodiments, the second loading device 4 includes a second base 41, a second actuator 42, a second transmission member 43 and a second loading rod 44. The second actuator 42 is arranged at a side of the second base 41, the output end of the second actuator 42 is connected with the second transmission member 43, the second transmission member 43 is installed on the second base 41, the second loading rod 44 is arranged along the second direction Y, one end of the second loading rod 44 is connected with the second transmission member 43, and the other end of the second loading rod 44 is used to output an excitation load along the second direction Y to the equivalent suspension 2 to be tested. The structure of the second loading device 4 is similar to that of the first loading device 3, and details are not described herein.
[0059] Referring to Figure 1 , Figure 6 and Figure 7 , in some embodiments, the third loading device 5 includes a third base 51, a third actuator 52, a support panel 53, a guide rod mechanism 54 and a bearing mechanism 55. The bearing mechanism 55 is installed at a side of the third base 51, the guide rod mechanism 54 is arranged along the third direction Z and is in sliding connection with the bearing mechanism 55, one end of the guide rod mechanism 54 is fixedly connected with the support panel 53, the third actuator 52 is arranged at a side of the third base 51 provided with the bearing mechanism 55, the output end of the third actuator 52 is connected with the support panel 53, and the support panel 53 supports the equivalent suspension 2 to be tested, and is used to output an excitation load along the third direction Z to the equivalent suspension 2 to be tested.
[0060] In one possible implementation, the third actuator 52 can also be a linear hydraulic actuator with ball joint connections at both ends. Two sets of bearing mechanisms 55 are symmetrically arranged on both sides of the third base 51 along the first direction X. Two sets of guide rod mechanisms 54 are slidably connected to the two sets of bearing mechanisms 55 respectively. The support panel 53 is fixedly connected to the top ends of the two sets of guide rod mechanisms 54. The third actuator 52 is located between the two sets of bearing mechanisms 55. The output end of the third actuator 52 is connected to the support panel 53 through one of the ball joint connections. The lower end of the third actuator 52 is connected to another fixed seat through the other ball joint connection, and the fixed seat is relatively fixed relative to the third base 51. When the third actuator 52 extends or retracts, it can drive the support panel 53 to reciprocate in the third direction Z, outputting an excitation load along the third direction Z to the equivalent suspension 2 under test. The guide rod mechanism 54 and the bearing mechanism 55 are used to guide the movement direction of the support panel 53.
[0061] Please see Figure 1 , Figure 8 , Figure 9 and Figure 10 In some embodiments, the suspension testing system 100 further includes a tray assembly 7, which includes a mounting plate 71, a first guide rail 72, a first slider 73, a slider connecting plate 74, a second slider 75, a second guide rail 76, and a tray 77. The mounting plate 71 is fixedly connected to the support panel 53. The tray 77 is disposed opposite to the mounting plate 71. The side of the tray 77 facing away from the mounting plate 71 supports the equivalent suspension 2 to be tested. The first guide rail 72 is mounted on the side of the tray 77 facing the mounting plate 71 and is disposed along a first direction X. The second guide rail 76 is mounted on the side of the mounting plate 71 facing the tray 77 and is disposed along a second direction Y. The first slider 73 is slidably connected to the first guide rail 72, the second slider 75 is slidably connected to the second guide rail 76, and the slider connecting plate 74 is fixedly connected to the first slider 73 and the second slider 75. In a specific embodiment, both the first guide rail 72 and the second guide rail 76 can be straight guide rails with an "I"-shaped cross-section and small baffles at both ends. The slider connecting plate 74 is approximately a cross-shaped flat plate, sandwiched between the first slider 73 and the second slider 75. The slider connecting plate 74 is fixedly connected to the first slider 73 at both ends in the first direction X. The slider connecting plate 74 is fixedly connected to the second slider 75 at both ends in the second direction Y.
[0062] Thus, by setting a guide rail and slider mechanism with an overall cross structure between the tray 77 and the mounting plate 71, the tray 77 can move relative to the mounting plate 71 in a plane. This achieves omnidirectional decoupling of the suspension system's movement and provides a path for longitudinal and lateral loading.
[0063] The tray 77 is in transmission connection with the first loading device 3 along the first direction X. Specifically, the first loading rod 34 is connected with the side of the tray 77 through a ball hinge assembly at the end away from the first transmission member 33. The tray 77 is in transmission connection with the second loading device 4 along the second direction Y. Specifically, the second loading rod 44 is connected with the other side of the tray 77 through a ball hinge assembly at the end away from the second transmission member 43.
[0064] In a possible implementation, the side of the tray 77 away from the mounting plate 71 is also provided with a road surface equivalent panel 78. The road surface equivalent panel 78 is detachably arranged on the tray 77, so that the road surface equivalent panel 78 can be replaced individually. Alternatively, the road surface equivalent panel 78 can also be replaced integrally with the tray 77. The road surface equivalent panel 78 can change the material or surface state according to the test requirements, so as to achieve different friction coefficient input effects and change the longitudinal and lateral loading efficiency on the equivalent suspension 2 to be tested.
[0065] The bench part of the suspension test system 100 of the present application is a three-axis test system. The contact point of the wheel 23 and the road surface equivalent panel 78 is taken as a loading point to apply excitation to the quarter suspension system. The longitudinal, lateral and vertical excitations can be applied simultaneously, or one or two excitations can be applied individually, so as to meet the condition requirements of different tests.
[0066] The load transmission path of the longitudinal excitation is as follows:
[0067] The first actuator 32→ the first transmission member 33→ the first loading rod 34→ the tray 77→ the road surface equivalent panel 78→ the wheel 23→ the damping assembly 21.
[0068] When the longitudinal input is applied, the rolling direction of the wheel 23 can be locked through the brake caliper, so as to increase the longitudinal input effect.
[0069] The load transmission path of the lateral excitation is as follows:
[0070] The second actuator 42→ the second transmission member 43→ the second loading rod 44→ the tray 77→ the road surface equivalent panel 78→ the wheel 23→ the damping assembly 21.
[0071] The load transmission path of the vertical excitation is as follows:
[0072] The third actuator 52→ the support panel 53→ the second guide rail 76→ the second sliding block 75→ the sliding block connecting plate 74→ the first sliding block 73→ the first guide rail 72→ the tray 77→ the road surface equivalent panel 78→ the wheel 23→ the damping assembly 21.
[0073] Please refer to Figure 1 、 Figure 13 、 Figure 14 and Figure 15In some embodiments, the control module 6 includes an industrial computer 61, a controller 62, an upper computer 63, a power distribution unit 64, and a control power supply 65. The industrial computer 61 is used for compiling algorithm models, issuing control instructions, monitoring signals of the test bench and the suspension, and processing data. The controller 62 is electrically connected to the test bench module and the suspension module in the suspension test system 100. The controller 62 includes a test bench controller 621 and a motor controller 622. The test bench controller 621 is used to control the test bench actuator (actuator in each loading device) and to feed back real-time signals of the test bench (force, displacement). The motor controller 622 is used to supply power to the suspension motor, control the operation of the suspension motor, and feed back real-time signals of the motor (torque, angle, speed). The test bench actuator and the suspension motor are double-actuated to generate suspension motion for different types of tests. The upper computer 63 is used to distribute motor control instructions and collect signal data of the motor and the suspension. The power distribution unit 64 and the control power supply 65 are both electrically connected to the controller 62 to provide corresponding power for various tests. The test bench actuator (actuator in each loading device) can also be externally connected to a hydraulic oil source to maintain hydraulic power.
[0074] In some embodiments, the control module 6 can also include a data acquisition instrument and a synchronization device. The data acquisition instrument is electrically connected to the controller 62, and during the test, the data acquisition instrument is used to collect signal data of each measuring point of the test bench and the suspension (spring-on acceleration, spring-off acceleration, suspension dynamic travel, body equivalent component displacement, wheel center displacement, etc.). The synchronization device is used to send synchronization signals to synchronize the signal time domain of the suspension system and the test bench system. The suspension system signals include motor signals (torque, angle, speed), spring-on acceleration, spring-off acceleration, suspension dynamic travel, etc. The test bench system signals include actuator force and displacement, body equivalent component displacement and acceleration, wheel center displacement and acceleration, lower arm acceleration of the shock absorber, and equivalent component acceleration of the subframe, etc.
[0075] When performing active suspension control model algorithm verification, the suspension control model is first imported into the upper computer 63 by the industrial computer 61, and the parameters of the control model in the upper computer 63 are kept real-time adjusted. The upper computer 63 sends instructions to the motor controller 622 to drive the suspension motor to move the suspension. The sensor signals related to the suspension motor and the suspension motion are returned to the upper computer 63, and then returned to the industrial computer 61 through the upper computer 63. During the foregoing process, the industrial computer 61 sends synchronization instructions to the upper computer 63 and the test bench controller 62 through the synchronization device to make the signal time domain returned by the upper computer 63 and the test bench controller 62 consistent, and the signals are uniformly processed by a data processing program.
[0076] Please refer to Figure 15The active suspension control model verification process is roughly as follows: a suspension control model and a test rig test condition are designed, then model parameters and test condition programs are input into the industrial computer 61, the control instructions are sent to the controller 62 by the host computer 63, the controller 62 controls the suspension motor drive and the test rig actuator drive according to the corresponding model parameters and test condition programs, respectively, to generate suspension movement. Then the data acquisition instrument collects the signal data of each test point of the test rig and the suspension, and feeds back the detection signal to the industrial computer 61. The suspension motor and the suspension movement related sensor signals are also returned to the industrial computer 61 through the host computer 63. The industrial computer 61 analyzes and processes the test data to determine whether to change the test condition. If the test condition needs to be changed, it returns to the step of designing the test rig condition and re-performs the subsequent steps. If the test condition does not need to be changed, it is determined whether the test structure reaches the expected target. If the expected target is reached, the test is completed. If the target is not reached, it is determined whether the control model needs to be modified, and the corresponding step is returned to start the test again.
[0077] The suspension test system 100 of the present application is a “test rig-suspension” system, which includes a plurality of excitation loading devices. Among them, the first loading device 3, the second loading device 4, and the third loading device 5 are test rig excitation modules for applying road load excitation or other required excitation to the suspension. The suspension motor is a suspension active control excitation, which responds to the test rig excitation in real time to ensure that the main parameters of the suspension, such as the spring-up acceleration, the spring-down acceleration, and the dynamic travel, reach the expected target.
[0078] The suspension test system 100 of the present application also has two test modes of inertia reaction force and fixed reaction force. The installation position of the limiting piece 124 can be adjusted to quickly switch between the two test modes of inertia reaction force and fixed reaction force. The first loading device 3, the second loading device 4, and the third loading device 5 cooperate with the tray assembly 7 to decouple the dynamic travel, and can simultaneously or individually apply excitation in three directions according to test requirements. The friction coefficient between the road surface equivalent panel 78 and the tire surface of the wheel 23 can be changed by adjusting the material or surface state of the road surface equivalent panel 78, which can simulate the longitudinal and lateral load input of the required test road surface.
[0079] The suspension test system 100 of the present application also integrates a test rig control system and an active suspension control system. The active suspension control system and the test rig control system are interconnected through the synchronization device to realize the closed loop of the “test rig-suspension” system as a whole, and the iteration verification efficiency of the active control model is higher.
[0080] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced without departing from the spirit and scope of the present application.
Claims
1. A suspension test system characterized by, The system comprises: a base assembly comprising a support assembly and a suspension mounting assembly arranged on one side of the support assembly; an equivalent suspension to be tested connected to the suspension mounting assembly; a first loading device arranged on one side of the equivalent suspension to be tested in a first direction; a second loading device arranged on one side of the equivalent suspension to be tested in a second direction, and the second loading device is arranged opposite to the base assembly; a third loading device supporting the equivalent suspension to be tested in a third direction, and the third loading device is located between the second loading device and the base assembly; the first direction, the second direction and the third direction are perpendicular to each other; a control module communicatively connected to the base assembly, the equivalent suspension to be tested, the first loading device, the second loading device and the third loading device.
2. The suspension test system according to claim 1, wherein: the suspension mounting assembly comprises a suspension guide rail, a plurality of suspension sliding blocks and a suspension mounting panel, the suspension guide rail is connected to one side of the support assembly, the suspension sliding blocks are movably connected to the suspension guide rail, and the suspension mounting panel is connected to a part of the plurality of suspension sliding blocks; the equivalent suspension to be tested is connected to the suspension mounting panel and another part of the plurality of suspension sliding blocks.
3. The suspension test system according to claim 2, wherein: the suspension mounting assembly further comprises a limiting piece, the limiting piece is detachably arranged on the support assembly, and the limiting piece abuts against or is spaced apart from the suspension mounting panel.
4. The suspension test system according to claim 2, wherein: the suspension mounting assembly further comprises a counterweight, and the counterweight is detachably arranged on the suspension mounting panel.
5. The suspension test system according to claim 1, wherein: the first loading device comprises a first base, a first actuator, a first transmission member and a first loading rod, the first actuator is arranged on one side of the first base, the output end of the first actuator is connected to the first transmission member, the first transmission member is mounted on the first base, the first loading rod is arranged in the first direction, one end of the first loading rod is connected to the first transmission member, and the other end of the first loading rod is used to output an excitation load in the first direction to the equivalent suspension to be tested.
6. The suspension test system according to claim 1, wherein: the second loading device comprises a second base, a second actuator, a second transmission member and a second loading rod, the second actuator is arranged on one side of the second base, the output end of the second actuator is connected to the second transmission member, the second transmission member is mounted on the second base, the second loading rod is arranged in the second direction, one end of the second loading rod is connected to the second transmission member, and the other end of the second loading rod is used to output an excitation load in the second direction to the equivalent suspension to be tested.
7. The suspension test system according to any one of claims 1-6, wherein: The third loading device comprises a third base, a third actuator, a support panel, a guide rod mechanism and a bearing mechanism, the bearing mechanism is installed on one side of the third base, the guide rod mechanism is arranged in a third direction and is in sliding connection with the bearing mechanism, one end of the guide rod mechanism is fixedly connected with the support panel, the third actuator is arranged on the side of the third base provided with the bearing mechanism, the output end of the third actuator is connected with the support panel, and the support panel supports the equivalent suspension to be tested and is used for outputting an excitation load in the third direction to the equivalent suspension to be tested.
8. The suspension test system according to claim 7, further comprising a tray assembly comprising a mounting plate, a first guide rail, a first sliding block, a sliding block connecting plate, a second sliding block, a second guide rail and a tray, the mounting plate is fixedly connected with the support panel, the tray is arranged opposite to the mounting plate, the tray supports the equivalent suspension to be tested on the side away from the mounting plate, the first guide rail is installed on the side of the tray facing the mounting plate and is arranged in a first direction, the second guide rail is installed on the side of the mounting plate facing the tray and is arranged in a second direction, the first sliding block is in sliding connection with the first guide rail, the second sliding block is in sliding connection with the second guide rail, and the sliding block connecting plate is fixedly connected with the first sliding block and the second sliding block. The tray is in driving connection with the first loading device in the first direction, and the tray is in driving connection with the second loading device in the second direction.
9. The suspension test system according to claim 8, wherein the side of the tray away from the mounting plate is further provided with a road surface equivalent panel.
10. The suspension test system according to claim 2, wherein the equivalent suspension to be tested comprises a damping assembly, a frame assembly and a wheel, the wheel is connected with the damping assembly and the frame assembly, the damping assembly is connected with the suspension mounting panel, the suspension mounting panel and the frame assembly are connected with the suspension sliding block, and the third loading device supports the wheel.