Power divider shaft vibration test method, device and equipment based on response control

Abstract

The invention relates to a power divider shaft vibration test method, device and equipment based on response control, and relates to the field of aerospace. According to the technical scheme, a power output shaft and a tool are installed on a vibration table, tightening torques of different gradients and multi-stage vibration loads are applied, and response values are collected to construct a load and response curve family; when an input load and a required response are given, traversing the curve family by taking the response as a vertical coordinate, selecting adjacent horizontal coordinates and a corresponding curve, and calculating a target tightening torque through linear interpolation; and applying a load after fastening with the target torque, if an actual measurement response error exceeds the range, performing iterative calculation based on the actual measurement response until the error reaches the standard, and determining the final torque. Under the condition, accurate adjustment of the response on the shaft can be realized, the response can be controlled within a reasonable interval range, an under-test phenomenon can be avoided, an over-test phenomenon can be effectively relieved, the power division shaft is ensured to be subjected to reasonable vibration load examination, possible problems in design are exposed in advance, the development period is shortened, and the development cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of aerospace technology, and in particular to a power split shaft vibration test method, device and equipment based on response control. Background Art

[0002] In aerospace, high-end equipment, and other fields, the power takeoff shaft, a core transmission component, has a direct impact on system reliability due to its vibration resistance and durability. Vibration testing is a key step in verifying this performance. Test load spectra are developed based on national military standards and actual operating loads, aiming to simulate the full lifecycle vibration environment. However, the nonlinear structural characteristics of the power takeoff shaft result in a nonlinear coupling relationship between its vibration response and acceleration excitation, making precise control of the vibration response at key locations on the shaft a technical challenge.

[0003] Currently, existing vibration test fixtures and test methods have significant limitations: fixed fixtures lack a dynamic adjustment mechanism, often causing the test acceleration response to deviate significantly from the design input, leading to over-testing risks, premature shaft failure or damage, and the test data losing its design verification value; fully flexible fixtures, by abandoning response control, are prone to under-testing, resulting in potential design flaws not being exposed, leading to failures in actual applications, extended R&D cycles, and increased costs. Currently, there is a technological gap in the design of such test fixtures and test methods in China. A vibration test fixture and test method with both adjustment accuracy and reliability is urgently needed to overcome the bottleneck in power split shaft test research and engineering design. Summary of the Invention

[0004] The purpose of the present invention is to provide a power split shaft vibration test method, device and equipment based on response control to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above object, the technical solution adopted by the present invention is: In a first aspect, the present invention provides a power split shaft vibration test method based on response control, the method comprising: S1. Install the power splitter shaft and vibration test fixture on a vibration table. Apply different gradients of tightening torque to the lock nut to adjust the damping force generated by the damping sleeve. Simultaneously apply vibration loads of multiple magnitudes at the first and second vibration control points. Collect acceleration response values ​​at the vibration response points and construct a family of curves reflecting the relationship between load input and response values. S2. For a specific power takeoff shaft, when an input load and a required response are given, traverse the family of curves with the required response as the ordinate value, obtain corresponding abscissa values, select two abscissa values ​​adjacent to the given input load and the curves corresponding to these two values, and calculate the corresponding target tightening torque based on a linear interpolation algorithm; S3. Tighten the locking nut with the target tightening torque, apply the given input load, and obtain a measured response value on the power take-off shaft. If the error between the measured response value and the required response exceeds a set range, repeat the calculation process of step S2 using the measured response value as a new ordinate value, update the tightening torque, and continue iterative optimization until the final response error meets the requirement, thereby determining a final tightening torque.

[0006] In a possible implementation, in step S1: The curve family reflects the nonlinear relationship between the deformation of the damping sleeve and the structural damping characteristics under different tightening torques.

[0007] In a possible implementation, in step S1: The vibration load application method includes at least sine frequency sweep, random vibration, and impact response spectrum.

[0008] In a possible implementation, in step S2: The linear interpolation algorithm adopts a two-point linear extrapolation model to calculate the target tightening torque according to the tightening torques corresponding to different curves and the adjacent horizontal coordinate values.

[0009] In a possible implementation, in step S3: The iterative optimization process includes at least two calculations, and the adjustment amount of the tightening torque after each iteration ensures that the damping parameter changes smoothly.

[0010] In a second aspect, the present invention provides a power split shaft vibration test device based on response control, comprising: power take-off shaft; and Two vibration test fixtures, located at both ends of the power take-off shaft, each including a spline shaft connected to the end of the power take-off shaft, and a damping sleeve, a spline sleeve, a locking plate, and a locking nut sequentially sleeved on the spline shaft along the axial direction, wherein the spline sleeve is fixed to the fixture base plate; Wherein, the first vibration control point and the second vibration control point are respectively installed on the spline sleeves of the two vibration test fixtures, and the vibration response point is installed at the middle position of the power split shaft.

[0011] In a possible implementation, the first vibration control point and the second vibration control point are used as control acceleration sensors for input control of the vibration load spectrum, and the control weights of the two control acceleration sensors are the same; The vibration response point is used as a response acceleration sensor to monitor the acceleration response of the middle position of the power tapping shaft.

[0012] In a possible implementation, the inner hole of the damping sleeve cooperates with the outer circumferential surface of the spline shaft, and the outer circumferential surface of the damping sleeve cooperates with the inner hole of the spline sleeve; The spline shaft is threadedly connected to the locking nut. When the locking nut is tightened, the locking plate, the spline sleeve and the damping sleeve can be pressed axially onto the spline shaft. By adjusting the tightening torque of the locking nut, the pressure degree of the damping sleeve can be changed, thereby adjusting the damping force generated by it.

[0013] In a possible implementation, the end of the power tapping shaft is connected to the spline shaft via a first connecting screw; The spline sleeve is fixed to the tooling base plate by a second connecting screw.

[0014] In a third aspect, the present invention provides a computer device, comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, code set or instruction set, and the processor can load and execute at least one instruction, at least one program, code set or instruction set to implement the power split shaft vibration test method based on response control provided above.

[0015] The beneficial effects brought about by the technical solution provided by the present invention include at least: This technical solution installs the power splitter shaft and tooling on a vibration table, applies different gradient tightening torques and multi-level vibration loads, collects response values ​​to construct a family of load and response curves; given an input load and a required response, traverses the family of curves with the response as the vertical coordinate, selects adjacent horizontal coordinates and corresponding curves, and calculates the target tightening torque through linear interpolation; after tightening with the target torque, the load is applied. If the measured response error exceeds the range, it is iterated based on the measured response until the error meets the standard to determine the final torque. In this case, the response on the shaft can be precisely adjusted and controlled within a reasonable range. This can avoid under-testing and effectively reduce over-testing, ensure that the power splitter shaft undergoes reasonable vibration load testing, expose potential problems in the design in advance, and achieve a closed-loop verification in the design stage, shortening the development cycle and reducing R&D costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] Figure 1 A schematic structural diagram of a power split shaft vibration test device based on response control provided by an exemplary embodiment of the present invention is shown.

[0018] Figure 2A cross-sectional schematic diagram of a power split shaft vibration test device based on response control provided by an exemplary embodiment of the present invention is shown.

[0019] Figure 3 A control principle diagram of a power split shaft vibration test device based on response control provided by an exemplary embodiment of the present invention is shown.

[0020] Figure 4 A flow chart of a power split shaft vibration test method based on response control provided by an exemplary embodiment of the present invention is shown.

[0021] Figure 5 A schematic structural diagram of a computer device for executing a power split shaft vibration test method based on response control provided by an exemplary embodiment of the present invention is shown.

[0022] In the picture: 100. Power take-off shaft; 101. First connecting screw; 200, vibration test fixture; 201, fixture base plate; 202, spline sleeve; 203, lock nut; 204, locking plate; 205, spline shaft; 206, damping sleeve; 300, second connecting screw; 400, first vibration control point; 401, second vibration control point; 402, vibration response point. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 FIG2 shows a schematic structural diagram of a power split shaft vibration test device based on response control provided by an exemplary embodiment of the present invention. Figure 2 FIG2 shows a cross-sectional schematic diagram of a power split shaft vibration test device based on response control provided by an exemplary embodiment of the present invention. Figure 3A control principle diagram of a power drop shaft vibration test device based on response control provided by an exemplary embodiment of the present invention is shown. The power drop shaft vibration test device based on response control includes: a power drop shaft 100 and a vibration test fixture 200. There are two vibration test fixtures 200, one located at each end of the power drop shaft 100. The vibration test fixture 200 includes a spline shaft 205 connected to the end of the power drop shaft 100 and a damping sleeve 206, a spline sleeve 202, a locking plate 204 and a locking nut 203 sequentially sleeved on the spline shaft 205 along the axial direction. The spline sleeve 202 is fixed to a fixture base plate 201. The spline sleeves 202 of the two vibration test fixtures 200 are respectively installed with a first vibration control point 400 and a second vibration control point 401, and a vibration response point 402 is installed in the middle position of the power drop shaft 100. The first vibration control point 400 and the second vibration control point 401 are used as control acceleration sensors for input control of the vibration load spectrum, and the control weights of the two control acceleration sensors are the same; the vibration response point 402 is used as a response acceleration sensor to monitor the acceleration response of the middle position of the power split shaft 100.

[0026] In an embodiment of the present application, the vibration test device forms a mechanical transmission path by rigidly connecting the vibration test tooling symmetrically arranged at both ends with the power take-off shaft. By using the damping sleeve in combination with the locking nut, the radial compression degree of the damping sleeve can be continuously changed by adjusting the tightening torque to regulate the damping force of the system. The spline sleeve is fixed to the tooling base plate to ensure uniform input of the vibration load; the vibration control points with equal weights at both ends realize symmetrical input of the vibration load to avoid eccentric load interference, and the middle response point monitors the acceleration response of the key position of the shaft in real time, constructing an input control, response feedback, and closed-loop adjustment mechanism. Based on the nonlinear mapping relationship between the damping parameters and the vibration response, it effectively solves the problem of over-testing or under-testing of traditional tooling, ensures that the test load spectrum is accurately matched with the actual response, provides reliable data support for the durability performance evaluation and design optimization of the power take-off shaft, and breaks through the control problem of nonlinear structural vibration testing.

[0027] Specifically, the inner bore of the damping sleeve 206 mates with the outer circumference of the spline shaft 205, which in turn mates with the inner bore of the spline sleeve 202. The spline shaft 205 is threadedly connected to the locking nut 203. Tightening the locking nut 203 axially compresses the locking plate 204, spline sleeve 202, and damping sleeve 206 against the spline shaft 205. Adjusting the tightening torque of the locking nut 203 changes the degree of compression on the damping sleeve 206, thereby adjusting the damping force generated. The end of the power take-off shaft 100 is connected to the spline shaft 205 via a first connecting screw 101; the spline sleeve 202 is secured to the tooling base plate 201 via a second connecting screw 300.

[0028] In the embodiments of the present application, the damping sleeve cooperates with the inner and outer circular surfaces of the spline shaft and spline sleeve to form a stable mechanical transmission path. When the locking nut is tightened, the locking plate, spline sleeve, and damping sleeve are axially compressed, changing the degree of compression on the damping sleeve and, in turn, adjusting the damping force generated, enabling flexible control of the vibration characteristics of the power take-off shaft. The screw connection between the spline shaft and the end of the power take-off shaft, and the fixation of the spline sleeve to the tooling base plate, ensure the stable transmission of vibration loads, providing reliable and adjustable testing conditions for vibration testing of the power take-off shaft.

[0029] It is worth mentioning that the locking piece is stuck in the groove of the spline sleeve through the protruding ears to prevent itself from rotating when the locking nut is tightened; when the tightening torque is adjusted to the right position, the locking piece is knocked to deform it, thereby locking the nut to prevent the nut from loosening, ensuring the tight connection of the entire vibration test fixture and ensuring that the damping sleeve is under stable pressure.

[0030] Figure 4 A schematic flow chart of a power split shaft vibration test method based on response control provided by an exemplary embodiment of the present invention is shown. The power split shaft vibration test method based on response control is applied to the above-mentioned power split shaft vibration test device based on response control. The method includes: Step S1: Install the power splitter shaft and the vibration test fixture on the vibration table, apply tightening torques of different gradients to the locking nut to adjust the damping force generated by the damping sleeve, synchronously apply vibration loads of multiple magnitudes at the first vibration control point and the second vibration control point, and collect the acceleration response values ​​of the vibration response points to construct a family of curves reflecting the relationship between the load input and the response value.

[0031] In the embodiment of the present application, the family of curves reflects the nonlinear relationship between the deformation of the damping sleeve and the structural damping characteristics under different tightening torques. The vibration load application method includes at least sine frequency sweep, random vibration, and impact response spectrum.

[0032] In some embodiments, step S1 includes: Step S11: Install the power splitter shaft and the vibration test fixture on the vibration table, tighten the lock nut with a tightening torque of 5 N·m, apply a vibration load through the first vibration control point and the second vibration control point, and apply the equivalent Grms of the load to 5g, 10g, 15g, 20g, 25g, 30g, 35g, and 40g, respectively. Synchronously collect the acceleration response values ​​of the vibration response points, and construct a curve A1 of the load input and response value; Step S12: adjust the tightening torque of the locking nut to 10 N·m, 15 N·m, 20 N·m, 25 N·m, 30 N·m, and 35 N·m in sequence, repeat the above step S11, and obtain curves A2 to A7 respectively, forming a complete curve family of the relationship between load input and response value.

[0033] It's worth noting that this step modifies the deformation of the damping sleeve by applying varying degrees of tightening torque to the locking nut, thereby regulating the structural damping characteristics. Simultaneously, by applying multiple vibration loads at the vibration control point and collecting acceleration at the response point, vibration response data can be obtained under different operating conditions. The constructed family of curves intuitively presents the relationship between load input and response value, providing data support for subsequent calculation of the appropriate tightening torque based on target parameters and achieving precise vibration response control.

[0034] Step S2: For a specific power take-off shaft, when an input load and a required response are given, the curve family is traversed with the required response as the ordinate value, the corresponding abscissa value is obtained, two abscissa values ​​adjacent to the given input load and the curves corresponding to these two values ​​are screened out, and the corresponding target tightening torque is calculated based on a linear interpolation algorithm.

[0035] In the embodiment of the present application, the linear interpolation algorithm adopts a two-point linear extrapolation model to calculate the target tightening torque according to the tightening torques corresponding to different curves and the adjacent horizontal coordinate values.

[0036] In some embodiments, step S2 includes: Step S21: for the target power drop shaft, when the input load is B0 and the required response is B1, traverse the curve family A1 to A7 with B1 as the vertical coordinate value to obtain the corresponding horizontal coordinate value; Step S22: Filter out the two values ​​C1 and C2 in the abscissa that are closest to B0, and the corresponding curves A_i and A_j. The tightening torques corresponding to the curves A_i and A_j are D1 and D2 respectively. Step S23 : Calculate the target tightening torque D0 based on a linear interpolation algorithm and according to the formula D0=D1+(B0−C1)×(D2−D1) / (C2−C1).

[0037] It's worth noting that this step, based on the established family of curves, achieves a precise mapping from target response to tightening torque. By traversing the family of curves using the desired response as the ordinate, the abscissa values ​​and corresponding curves adjacent to the given input load are selected. Using a linear interpolation algorithm and combining the tightening torques corresponding to the different curves, the target tightening torque that meets the target response is calculated. This process provides a key parameter setting basis for vibration testing, enabling precise control of the vibration response of the power takeoff shaft and effectively resolving the parameter control challenges associated with nonlinear structural vibration testing.

[0038] Step S3: Tighten the locking nut with the target tightening torque and apply a given input load to obtain the measured response value on the power take-off shaft. If the error between the measured response value and the required response exceeds the set range, the measured response value is used as the new ordinate value, and the calculation process of step S2 is repeated to update the tightening torque and continue iterative optimization until the final response error meets the requirement and the final tightening torque is determined.

[0039] In an embodiment of the present application, the iterative optimization process includes at least two calculations, and the adjustment amount of the tightening torque after each iteration ensures that the damping parameter changes smoothly.

[0040] In some embodiments, step S3 includes: Step S31: tighten the locking nut with a tightening torque D0, apply an acceleration load B0, and obtain a measured response value B1' of the vibration response point; Step S32: If |(B1'-B1) / B1|>5%, replace B1 with B1' and repeat the interpolation calculation of step S2 to update the tightening torque to D0'; Step S33 , repeat the above iterative process until the final converged response value B1′′ of the iterative correction process is obtained, and the response error satisfies |(B1′′-B1) / B1|≤5%, and the final tightening torque D0′ is determined.

[0041] It's worth noting that this step achieves precise control of the vibration response through closed-loop iterative optimization. First, the nut is tightened at the target tightening torque and a load is applied. The measured response value is then obtained. If the error between the measured value and the required response exceeds the specified range, the tightening torque is recalculated and adjusted using the new value as the new parameter. Through multiple iterations, the response error is gradually reduced, ensuring a smooth change in the damping parameters after each adjustment until the response error meets the specified requirements. The final tightening torque determined ensures that the power take-off shaft achieves the expected vibration response during the test, improving the reliability and validity of the test results.

[0042] Figure 5 A schematic structural diagram of a computer device for performing a power split shaft vibration test method based on response control provided by an exemplary embodiment of the present invention is shown. The computer device includes: The processor 501 includes one or more processing cores. The processor 501 executes various functional applications and data processing by running software programs and modules.

[0043] Receiver 502 and transmitter 503 can be implemented as a communication component, which can be a communication chip. Optionally, the communication component can include signal transmission functionality. That is, transmitter 503 can be used to transmit control signals to the image acquisition device and scanning device, and receiver 502 can be used to receive corresponding feedback instructions.

[0044] The memory 504 is connected to the processor 501 via a bus 505 .

[0045] The memory 504 may be used to store at least one instruction, and the processor 501 may be used to execute the at least one instruction to implement each step in the above method embodiment.

[0046] An embodiment of the present invention also provides a computer-readable storage medium, which stores at least one instruction, at least one program, code set or instruction set, which is loaded and executed by a processor to implement the above-mentioned power split shaft vibration test method based on response control.

[0047] The present invention also provides a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the power split shaft vibration test method based on response control described in any of the above embodiments.

[0048] Optionally, the computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), solid-state drive (SSD), or optical disk. Among them, random access memory may include resistance random access memory (ReRAM) and dynamic random access memory (DRAM). The serial numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0049] It should be understood that the specific examples herein are only intended to help those skilled in the art to better understand the present disclosure, rather than to limit the scope of the present invention.

[0050] It can be understood that in the various implementations of this specification, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of this disclosure.

[0051] It can be understood that the various embodiments described in this specification can be implemented individually or in combination, and the present disclosure is not limited thereto.

[0052] Unless otherwise indicated, all technical and scientific terms used in this disclosure have the same meaning as commonly understood by those skilled in the art in the technical field of this specification. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the scope of this specification. The term "and / or" used in this specification includes any and all combinations of one or more related listed items. The singular forms "a", "above", and "the" used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0053] It is understood that the processor of the present disclosure can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above-mentioned method implementation can be completed by hardware integrated logic circuits in the processor or software instructions. The above-mentioned processor can be a general-purpose processor, 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, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in this disclosure can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this disclosure can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above-mentioned method in combination with its hardware.

[0054] It will be understood that the memory in the present disclosure may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory may be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically erasable programmable read-only memory (EEPROM) or flash memory. The volatile memory may be random access memory (RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0055] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this specification.

[0056] The above description is merely a specific embodiment of this specification, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this specification should be included in the scope of protection of this specification. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A power split shaft vibration test method based on response control, characterized in that: The method comprises: S1. Install the power splitter shaft and vibration test fixture on a vibration table. Apply different gradients of tightening torque to the lock nut to adjust the damping force generated by the damping sleeve. Simultaneously apply vibration loads of multiple magnitudes at the first and second vibration control points. Collect acceleration response values ​​at the vibration response points and construct a family of curves reflecting the relationship between load input and response values. S2. For a specific power takeoff shaft, when an input load and a required response are given, traverse the family of curves with the required response as the ordinate value, obtain corresponding abscissa values, select two abscissa values ​​adjacent to the given input load and the curves corresponding to these two values, and calculate the corresponding target tightening torque based on a linear interpolation algorithm; S3. Tighten the locking nut with the target tightening torque, apply the given input load, and obtain a measured response value on the power take-off shaft. If the error between the measured response value and the required response exceeds a set range, repeat the calculation process of step S2 using the measured response value as a new ordinate value, update the tightening torque, and continue iterative optimization until the final response error meets the requirement, thereby determining a final tightening torque.

2. The power split shaft vibration test method based on response control according to claim 1, characterized in that: In the step S1: The curve family reflects the nonlinear relationship between the deformation of the damping sleeve and the structural damping characteristics under different tightening torques.

3. The power split shaft vibration test method based on response control according to claim 1, characterized in that: In the step S1: The vibration load application method includes at least sine frequency sweep, random vibration, and impact response spectrum.

4. The power split shaft vibration test method based on response control according to claim 1, characterized in that: In the step S2: The linear interpolation algorithm adopts a two-point linear extrapolation model to calculate the target tightening torque according to the tightening torques corresponding to different curves and the adjacent horizontal coordinate values.

5. The power split shaft vibration test method based on response control according to claim 1, characterized in that: In the step S3: The iterative optimization process includes at least two calculations, and the adjustment amount of the tightening torque after each iteration ensures that the damping parameter changes smoothly.

6. A power split shaft vibration test device based on response control, characterized in that: include: a power take-off shaft (100); and A vibration test fixture (200), which is two and is located at both ends of the power take-off shaft (100), and includes a spline shaft (205) connected to the end of the power take-off shaft (100), and a damping sleeve (206), a spline sleeve (202), a locking plate (204) and a locking nut (203) sequentially sleeved on the spline shaft (205) along the axial direction, wherein the spline sleeve (202) is fixed on the fixture base plate (201); The first vibration control point (400) and the second vibration control point (401) are respectively installed on the spline sleeves (202) of the two vibration test fixtures (200), and the vibration response point (402) is installed at the middle position of the power split shaft (100).

7. The power split shaft vibration test device based on response control according to claim 6, characterized in that: The first vibration control point (400) and the second vibration control point (401) are used as control acceleration sensors for input control of the vibration load spectrum, and the control weights of the two control acceleration sensors are the same; The vibration response point (402) is used as a response acceleration sensor to monitor the acceleration response of the middle position of the power split shaft (100).

8. The power split shaft vibration test device based on response control according to claim 6, characterized in that: The inner hole of the damping sleeve (206) cooperates with the outer cylindrical surface of the spline shaft (205), and the outer cylindrical surface of the damping sleeve (206) cooperates with the inner hole of the spline sleeve (202); The spline shaft (205) is threadedly connected to the locking nut (203). When the locking nut (203) is tightened, the locking plate (204), the spline sleeve (202) and the damping sleeve (206) can be pressed axially onto the spline shaft (205). By adjusting the tightening torque of the locking nut (203), the degree of pressure on the damping sleeve (206) can be changed, thereby adjusting the damping force generated by it.

9. The power split shaft vibration test device based on response control according to claim 6, characterized in that: The end of the power take-off shaft (100) is connected to the spline shaft (205) via a first connecting screw (101); The spline sleeve (202) is fixed to the tooling base plate (201) via a second connecting screw (300).

10. A computer device, characterized in that: The computer device includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, code set or instruction set, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by the processor to implement the power split shaft vibration test method based on response control as described in any one of claims 1 to 5.

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