Device and method for testing dynamic characteristics of flexible disc

Abstract

The invention relates to the technical field of vehicles, in particular to a flexible disc dynamic characteristic testing device and method. The torsion vibration exciter is used for sending out an excitation signal according to a received test parameter; the excitation end test clamp is used for clamping one end of the to-be-tested flexible disc and transmitting an excitation signal to the to-be-tested flexible disc; the response end test clamp is used for clamping the other end of the to-be-tested flexible disc and transmitting a response signal generated by the to-be-tested flexible disc based on the excitation signal to the sensing assembly; the sensing assembly is used for collecting response signals; the processing assembly is used for generating a torsion dynamic characteristic test result of the to-be-tested flexible disc according to the response signal. Therefore, the problems that in the prior art, the precise test requirement for the dynamic characteristics of the flexible disc cannot be met, the precision of the test result cannot be ensured, and the data reliability is low are solved, the test efficiency is improved, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a flexible disc dynamic characteristic testing device and method. BACKGROUND

[0002] As a key component of a vehicle transmission system, the performance of a flexible disc directly affects the transmission efficiency, running stability and NVH (Noise-Vibration-Harshness) performance. In the production and manufacturing of flexible discs, it is very important to test the dynamic characteristics of the flexible disc.

[0003] However, the related art lacks a testing method for the dynamic characteristics of a flexible disc, which cannot meet the precise testing requirements for the dynamic characteristics of the flexible disc, cannot ensure the accuracy of the test results, and has low data reliability, which needs to be solved urgently. SUMMARY

[0004] The present application provides a flexible disc dynamic characteristic testing device and method to solve the problem that the related art cannot meet the precise testing requirements for the dynamic characteristics of the flexible disc, cannot ensure the accuracy of the test results, and has low data reliability, improves the testing efficiency, and has a wide range of applications.

[0005] To achieve the above-mentioned purpose, the first aspect of the present application provides a flexible disc dynamic characteristic testing device, comprising: a torsional exciter, an excitation end testing fixture, a response end testing fixture, a sensing assembly and a processing assembly, wherein, The torsional exciter is configured to send an excitation signal according to the received test parameters; The excitation end testing fixture is configured to clamp one end of a flexible disc to be tested and transmit the excitation signal to the flexible disc to be tested; The response end testing fixture is configured to clamp the other end of the flexible disc to be tested and transmit the response signal generated by the flexible disc to be tested based on the excitation signal to the sensing assembly; The sensing assembly is configured to collect the response signal; The processing assembly is configured to generate a torsional dynamic characteristic test result of the flexible disc to be tested according to the response signal.

[0006] According to one embodiment of the present application, the sensing assembly comprises: A force sensing unit is configured to collect angle sensing data and force sensing data of the flexible disc to be tested; An acceleration sensing unit is configured to collect acceleration sensing data of the flexible disc to be tested.

[0007] According to one embodiment of the present application, the processing assembly comprises: The processing unit is used to calculate the torsional natural frequency of the flexible disk under test based on the acceleration sensing data, and to calculate the torsional dynamic stiffness and torsional damping angle of the flexible disk under test based on the angle sensing data and force sensing data. The generation unit is used to generate the torsional dynamic characteristic test results of the flexible disk under test based on the torsional natural frequency, the torsional dynamic stiffness and the torsional damping angle.

[0008] According to one embodiment of this application, the torsional natural frequency is the frequency corresponding to the peak gain, wherein the peak gain is calculated using the following formula: ; Where Gain is the peak gain, a1 is the maximum acceleration in the tangential direction at the excitation end, and a2 is the maximum acceleration in the tangential direction at the fixed end.

[0009] According to one embodiment of this application, the torsional dynamic stiffness is: ; in, The torsional dynamic stiffness is... This represents the peak-to-peak torque. The angle peak value.

[0010] According to one embodiment of this application, the torsional damping angle is: ; in, The torsional damping angle is... For the load vector phase, The phase is the angle vector.

[0011] According to one embodiment of this application, the excitation end test fixture is connected to the flexible disk to be tested by bolts.

[0012] The flexible disk dynamic characteristic testing device proposed in this application transmits an excitation signal to the excitation end test fixture via a torsional vibrator, and then transmits the signal to the flexible disk under test via the excitation end test fixture. The response signal generated by the flexible disk is acquired by the response end test fixture and transmitted to the sensing component. The processing unit then generates the torsional dynamic characteristic test results of the flexible disk based on the signal transmitted by the sensing component. This solves the problems in related technologies, such as the inability to meet the requirements for accurate testing of the dynamic characteristics of flexible disks, the inability to ensure the accuracy of test results, and the low reliability of data. It improves testing efficiency and has a wide range of applications.

[0013] To achieve the above objectives, a second aspect of this application provides a method for testing the dynamic characteristics of a flexible disk. The method is applied to the flexible disk dynamic characteristics testing device described above, and includes the following steps: Obtain the test requirements for the flexible disk to be tested; Based on the test requirements, test parameters are determined, and the torsional vibrator is controlled to emit an excitation signal according to the test parameters. The excitation signal is then transmitted to the flexible disk under test through the excitation end test fixture, and the response signal generated by the flexible disk under test based on the excitation signal is transmitted to the sensing component through the response end test fixture. The sensing component acquires the response signal, and the processing component generates the torsional dynamic characteristic test results of the flexible disk under test based on the response signal.

[0014] According to one embodiment of this application, before controlling the torsional vibrator to emit an excitation signal according to the test parameters, the method further includes: Based on the aforementioned testing requirements, modal analysis is performed on the 3D digital model data of the excitation end test fixture and the 3D digital model data of the response end test fixture to obtain modal analysis results. Based on the modal analysis results, determine whether both the excitation end test fixture and the response end test fixture meet the test requirements; If the 3D model data of the excitation end test fixture or the response end test fixture does not meet the test requirements, the target fixture that does not meet the test requirements shall be redesigned.

[0015] According to one embodiment of this application, after determining whether both the excitation end test fixture and the response end test fixture meet the test requirements based on the modal analysis results, the method further includes: If both the excitation end test fixture and the response end test fixture meet the test requirements, then one end of the flexible disk to be tested is clamped by the excitation end test fixture, and the other end of the flexible disk to be tested is clamped by the response end test fixture.

[0016] The method for testing the dynamic characteristics of a flexible disk according to the embodiments of this application transmits an excitation signal to the excitation end test fixture via a torsional vibrator. The excitation end test fixture then transmits the signal to the flexible disk under test. The response signal generated by the flexible disk is acquired by the response end test fixture and transmitted to the sensing component. Finally, a processing unit generates the torsional dynamic characteristic test results of the flexible disk based on the signal transmitted by the sensing component. This solves the problems in related technologies, such as the inability to meet the requirements for accurate testing of the dynamic characteristics of flexible disks, the inability to ensure the accuracy of test results, and low data reliability. It improves testing efficiency and has a wide range of applications.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a block diagram of a flexible disk dynamic characteristic testing device provided according to an embodiment of this application; Figure 2 This is a block diagram of a flexible disk dynamic characteristic testing device according to an embodiment of this application; Figure 3 This is a flowchart of a method for testing the dynamic characteristics of a flexible disk according to an embodiment of this application; Figure 4 This is a flowchart of a method for testing the dynamic characteristics of a flexible disk according to an embodiment of this application. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0020] The following describes the flexible disk dynamic characteristic testing apparatus and method according to the embodiments of this application with reference to the accompanying drawings. First, the flexible disk dynamic characteristic testing apparatus according to the embodiments of this application will be described with reference to the accompanying drawings.

[0021] Figure 1 This is a block diagram of a flexible disk dynamic characteristic testing device according to an embodiment of this application.

[0022] like Figure 1 As shown, the flexible disk dynamic characteristic testing device 10 includes: a torsional exciter 100, an excitation end test fixture 200, a response end test fixture 300, a sensing component 400, and a processing component 500. The torsional exciter 100 is used to emit an excitation signal based on received test parameters; the excitation end test fixture 200 is used to clamp one end of the flexible disk to be tested and transmit the excitation signal to the flexible disk; the response end test fixture 300 is used to clamp the other end of the flexible disk to be tested and transmit the response signal generated by the flexible disk based on the excitation signal to the sensing component 400; the sensing component 400 is used to acquire the response signal; and the processing component 500 is used to generate the torsional dynamic characteristic test results of the flexible disk to be tested based on the response signal.

[0023] The excitation signal refers to the specific signal emitted by the excitation source that triggers a response from the flexible disk. The response signal refers to the signal generated by the actual response of the flexible disk after receiving the excitation signal.

[0024] Specifically, after receiving the test parameters, the torsional vibrator 100 emits a specific excitation signal; the excitation end test fixture 200 clamps one end of the flexible disk to be tested and transmits the excitation signal to the flexible disk, causing the flexible disk to generate a torsional motion; the response end test fixture 300 clamps the other end of the flexible disk to be tested, captures the reaction generated by the flexible disk to be tested after being excited, and converts this reaction into a response signal and transmits it to the sensing component 400; the sensing component 400 is used to collect the response signal transmitted from the response end test fixture 300; the processing component 500 calculates and analyzes the response signal collected by the sensing component 400, and finally obtains the test results of the torsional dynamic characteristics of the flexible disk.

[0025] To help those skilled in the art to further understand the excitation end test fixture 200, sensing component 400, and processing component 500 of the embodiments of this application, detailed descriptions are provided below in conjunction with specific embodiments.

[0026] First, the excitation end test fixture 200 of the embodiments of this application will be described in detail.

[0027] Optionally, in some embodiments, the excitation end test fixture 200 is bolted to the flexible disk to be tested.

[0028] Specifically, this application requires clear testing requirements, such as testing the dynamic characteristics of a flexible disk under torsional conditions within a frequency range of 5-500Hz. To ensure the accuracy and effectiveness of the torsional dynamic characteristic test of the flexible disk, a dedicated test fixture needs to be developed and designed according to standard procedures. The fixture's 3D (Three-Dimensional) model needs to be designed in conjunction with the actual vehicle mounting condition of the flexible disk, simulating its installation, stress, and connection conditions. A two-end structure with an excitation end and a fixed end should be adopted to accommodate the transmission requirements of the excitation signal and the response signal, respectively. Based on the fixture's 3D model, the first-order natural frequency of the fixture is calculated and verified through modal analysis. It needs to be greater than three times the maximum test frequency. For example, if the test frequency range is 5-500Hz, the first-order natural frequency of the fixture needs to be greater than 1500Hz. If this requirement is not met, the model structure needs to be optimized, such as by thickening the plate material, to avoid fixture resonance interfering with the test signal. A physical fixture is then prototyped based on the verified 3D model to ensure that its structure, performance, and design are consistent. The excitation end test fixture 200 and the flexible disk under test are mechanically connected by bolts, which can ensure that there is no relative movement or loosening between the excitation end test fixture 200 and the flexible disk under test during the test, and ensure that the excitation signal emitted by the torsional vibrator 200 is transmitted completely and stably to the flexible disk under test.

[0029] Next, the sensing component 400 of the embodiments of this application will be described in detail.

[0030] Optionally, such as Figure 2 As shown, in some embodiments, the sensing component 400 includes a force sensing unit 401 and an acceleration sensing unit 402. The force sensing unit 401 is used to collect angle sensing data and force sensing data of the flexible disk under test; the acceleration sensing unit 402 is used to collect acceleration sensing data of the flexible disk under test.

[0031] Among them, angle sensing data refers to measurement data reflecting the angle change and related states of the flexible disk under test under torsional excitation. Force sensing data refers to measurement data reflecting the torsional force-related states of the flexible disk under test under torsional excitation. Acceleration sensing data refers to measurement data reflecting the acceleration-related dynamic states of the flexible disk under test under torsional excitation.

[0032] Specifically, the sensing component 400 mainly consists of a force sensing unit 401 and an acceleration sensing unit 402. The force sensing unit 401 is responsible for synchronously acquiring angle sensor data (reflecting the torsion angle and its trend) and force sensing data (reflecting the magnitude and dynamic changes of the torsion force) of the flexible disk under torsional excitation. The acceleration sensing unit 402 is used to acquire acceleration sensing data (reflecting the value and fluctuation law of the torsional angular acceleration) during the torsion process of the flexible disk.

[0033] For example, the dynamic characteristics of a flexible disk within the 5-500Hz range are tested, specifically its natural frequency, torsional dynamic stiffness, and torsional damping angle. For testing the natural frequency of the flexible disk under test, the acceleration sensing unit 402 of the sensing component 400 needs to be installed in the torsional tangential direction of the response end test fixture 300. Torsional excitation is applied through the torsional exciter 100, with the excitation amplitude set to 3g (i.e., the maximum acceleration a1 in the tangential direction at the excitation end is 3g). A frequency sweep test is performed within the 5-500Hz range. The acceleration sensing unit 402 of the sensing component 400 collects the acceleration sensing data of the flexible disk under test (i.e., the maximum acceleration value in the tangential direction at the fixed end) transmitted from the response end test fixture 300.

[0034] For testing the torsional dynamic stiffness and torsional damping angle of the flexible disk under test, the response end test fixture 300 needs to be fixed on the force sensing unit of the sensing component 400, horizontally parallel to the torsional axis, and can be installed 100mm away from the torsional center. The force sensing unit 401 can be two force sensors. During the test, the excitation end test fixture 200 is subjected to a 5~500Hz sweep excitation, and the excitation angle amplitude can be ±0.1°. At the same time, the measurement values ​​of the two force sensors of the force sensing unit 401 are collected.

[0035] Finally, the processing component 500 of the embodiments of this application will be described in detail.

[0036] Optionally, in some embodiments, the processing component 500 includes a processing unit 501 and a generation unit 502 (not shown in the figure), wherein the processing unit 501 is used to calculate the torsional natural frequency of the flexible disk under test based on acceleration sensing data, and to calculate the torsional dynamic stiffness and torsional damping angle of the flexible disk under test based on angle sensing data and force sensing data; the generation unit 502 is used to generate the torsional dynamic characteristic test results of the flexible disk under test based on the torsional natural frequency, torsional dynamic stiffness and torsional damping angle.

[0037] Optionally, in some implementations, the torsional natural frequency is the frequency corresponding to the peak gain, wherein the peak gain is calculated using the following formula: ; Where Gain is the peak gain, a1 is the maximum acceleration in the tangential direction at the excitation end, and a2 is the maximum acceleration in the tangential direction at the fixed end.

[0038] Optionally, in some embodiments, the torsional dynamic stiffness is: ; in, For torsional dynamic stiffness, This represents the peak-to-peak torque. The angle peak value.

[0039] Optionally, in some embodiments, the torsional damping angle is: ; in, To the torsional damping angle, For the load vector phase, The phase is the angle vector.

[0040] Specifically, the processing component 500 receives angle sensing data, force sensing data, and acceleration sensing data transmitted by the sensing component 400. The processing unit 501 in the processing component 500 calculates the torsional natural frequency of the flexible disk under test based on the acceleration sensing data, and calculates the torsional dynamic stiffness and torsional damping angle of the flexible disk under test based on the angle sensing data and force sensing data. The generation unit 502 in the processing component 500 generates the torsional dynamic characteristic test results of the flexible disk under test based on the torsional natural frequency, torsional dynamic stiffness, and torsional damping angle output by the processing unit.

[0041] Furthermore, the processing unit 501 receives acceleration sensing data transmitted by the sensing component 400, namely the maximum acceleration value a2 in the tangential direction at the fixed end and the maximum acceleration in the tangential direction at the excitation end, which can be 3g, i.e. a1. Based on the peak gain calculation formula, the peak gain is calculated, and the frequency corresponding to this peak value is recorded as the torsional natural frequency.

[0042] On the other hand, the processing unit 501 receives the values ​​from the force sensing unit 401 transmitted by the sensing component 400, namely the values ​​F1 and F2 from the two force sensors. When the torsional exciter 100 performs a 5~500Hz sweep frequency excitation on the excitation end test fixture 200, and the excitation angle amplitude is ±0.1°, the peak-to-peak torque is: ; F1 and F2 are the values ​​of two force sensors, respectively, in N·m.

[0043] Peak angle °, according to the torsional dynamic stiffness formula, the torsional dynamic stiffness is calculated, with units of N / °. Further, the processing unit 501, based on the values ​​transmitted by the force sensing unit 401, obtains the load vector phase through signal analysis and processing. Phase with angle vector The torsional damping angle is obtained through the formula for calculating the torsional damping angle.

[0044] In summary, after the torsional natural frequency, torsional dynamic stiffness and torsional damping angle are calculated by the processing unit 501, the generation unit 502 of the processing component 500 generates the torsional dynamic characteristic test results of the flexible disk to be tested based on the results obtained by the processing unit 501.

[0045] Therefore, the flexible disk to be tested is installed on the test bench, and the flexible disk is subjected to frequency sweep sinusoidal excitation. Tangential vibration acceleration or angular velocity data is measured. Using excitation or torsional angle excitation, and adopting the corresponding data processing method, the dynamic characteristics such as the natural frequency of the torsional direction of the flexible disk, the torsional dynamic stiffness at different frequencies, and the torsional damping angle are extracted. It has the advantages of high precision, high efficiency and wide applicability.

[0046] To facilitate a better understanding of the flexible disk dynamic characteristic testing device proposed in this application, a detailed description of the flexible disk dynamic characteristic testing method based on this device will be provided below.

[0047] like Figure 3 As shown, Figure 3 This is a flowchart of a method for testing the dynamic characteristics of a flexible disk according to an embodiment of this application. The method includes the following steps: S301, Test preparation, including: determining test requirements, designing test fixtures, and prototyping the fixtures.

[0048] S302, Test and inspection, including recording feedback data from angle sensors, force sensors and acceleration sensors.

[0049] S303, test result data processing, including calculating data such as torsional natural frequency, torsional dynamic stiffness and torsional damping angle, and outputting the torsional dynamic characteristics of the flexible disc.

[0050] The flexible disk dynamic characteristic testing device proposed in this application transmits an excitation signal to the excitation end test fixture via a torsional vibrator, and then transmits the signal to the flexible disk under test via the excitation end test fixture. The response signal generated by the flexible disk is acquired by the response end test fixture and transmitted to the sensing component. The processing unit then generates the torsional dynamic characteristic test results of the flexible disk based on the signal transmitted by the sensing component. This solves the problems in related technologies, such as the inability to meet the requirements for accurate testing of the dynamic characteristics of flexible disks, the inability to ensure the accuracy of test results, and the low reliability of data. It improves testing efficiency and has a wide range of applications.

[0051] Next, referring to the accompanying drawings, a method for testing the dynamic characteristics of a flexible disk according to an embodiment of this application is described, which is applied to the aforementioned device for testing the dynamic characteristics of a flexible disk.

[0052] Figure 4 This is a flowchart of a method for testing the dynamic characteristics of a flexible disk according to an embodiment of this application.

[0053] like Figure 4 As shown, the method for testing the dynamic characteristics of the flexible disk includes: S401, Obtain the test requirements for the flexible disk to be tested; S402, based on the test requirements, determines the test parameters, and controls the torsional vibrator to send an excitation signal according to the test parameters, so as to transmit the excitation signal to the flexible disk under test through the excitation end test fixture, and transmit the response signal generated by the flexible disk under test based on the excitation signal to the sensing component through the response end test fixture. S403 acquires response signals through sensing components and uses processing components to generate test results of the torsional dynamic characteristics of the flexible disk under test based on the response signals.

[0054] According to one embodiment of this application, before controlling the torsional vibrator to emit an excitation signal based on test parameters, the method further includes: Based on the testing requirements, modal analysis was performed on the 3D digital model data of the excitation end test fixture and the 3D digital model data of the response end test fixture to obtain the modal analysis results. Based on the modal analysis results, determine whether both the excitation end test fixture and the response end test fixture meet the test requirements; If the 3D model data of the excitation end test fixture or the response end test fixture does not meet the test requirements, the target fixture that does not meet the test requirements shall be redesigned.

[0055] According to one embodiment of this application, after determining whether both the excitation-end test fixture and the response-end test fixture meet the test requirements based on the modal analysis results, the method further includes: If both the excitation end test fixture and the response end test fixture meet the test requirements, then one end of the flexible disk to be tested is clamped by the excitation end test fixture, and the other end of the flexible disk to be tested is clamped by the response end test fixture.

[0056] It should be noted that the foregoing explanation of the embodiment of the flexible disk dynamic characteristic testing device also applies to the flexible disk dynamic characteristic testing method of this embodiment, and will not be repeated here.

[0057] The method for testing the dynamic characteristics of a flexible disk according to the embodiments of this application transmits an excitation signal to the excitation end test fixture via a torsional vibrator. The excitation end test fixture then transmits the signal to the flexible disk under test. The response signal generated by the flexible disk is acquired by the response end test fixture and transmitted to the sensing component. Finally, a processing unit generates the torsional dynamic characteristic test results of the flexible disk based on the signal transmitted by the sensing component. This solves the problems in related technologies, such as the inability to meet the requirements for accurate testing of the dynamic characteristics of flexible disks, the inability to ensure the accuracy of test results, and low data reliability. It improves testing efficiency and has a wide range of applications.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A device for testing the dynamic characteristics of a flexible disk, characterized in that, include: Torsional exciter, excitation end test fixture, response end test fixture, sensing components, and processing components, among which, The torsional exciter is used to generate an excitation signal based on the received test parameters; The excitation end test fixture is used to clamp one end of the flexible disk to be tested and to transmit the excitation signal to the flexible disk to be tested; The response end test fixture is used to clamp the other end of the flexible disk under test, and is used to transmit the response signal generated by the flexible disk under test based on the excitation signal to the sensing component. The sensing component is used to acquire the response signal; The processing component is used to generate test results of the torsional dynamic characteristics of the flexible disk under test based on the response signal.

2. The flexible disk dynamic characteristic testing device according to claim 1, characterized in that, The sensing component includes: The force sensing unit is used to collect angle sensing data and force sensing data of the flexible disk under test. An acceleration sensing unit is used to collect acceleration sensing data of the flexible disk under test.

3. The flexible disk dynamic characteristic testing device according to claim 2, characterized in that, The processing component includes: The processing unit is used to calculate the torsional natural frequency of the flexible disk under test based on the acceleration sensing data, and to calculate the torsional dynamic stiffness and torsional damping angle of the flexible disk under test based on the angle sensing data and force sensing data. The generation unit is used to generate the torsional dynamic characteristic test results of the flexible disk under test based on the torsional natural frequency, the torsional dynamic stiffness and the torsional damping angle.

4. The flexible disk dynamic characteristic testing device according to claim 3, characterized in that, The torsional natural frequency is the frequency corresponding to the peak gain, wherein the peak gain is calculated using the following formula: ； Where Gain is the peak gain, a1 is the maximum acceleration in the tangential direction at the excitation end, and a2 is the maximum acceleration in the tangential direction at the fixed end.

5. The flexible disk dynamic characteristic testing device according to claim 3, characterized in that, The torsional dynamic stiffness is: ； in, The torsional dynamic stiffness is... This represents the peak-to-peak torque. The angle peak value.

6. The flexible disk dynamic characteristic testing device according to claim 3, characterized in that, The torsional damping angle is: ； in, The torsional damping angle is... For the load vector phase, The phase is the angle vector.

7. The flexible disk dynamic characteristic testing device according to claim 1, characterized in that, The excitation end test fixture is connected to the flexible disk to be tested by bolts.

8. A method for testing the dynamic characteristics of a flexible disk, characterized in that, The method is applied to the dynamic characteristic testing device for flexible disks as described in any one of claims 1-7, wherein the method includes the following steps: Obtain the test requirements for the flexible disk to be tested; Based on the test requirements, test parameters are determined, and the torsional vibrator is controlled to emit an excitation signal according to the test parameters. The excitation signal is then transmitted to the flexible disk under test through the excitation end test fixture, and the response signal generated by the flexible disk under test based on the excitation signal is transmitted to the sensing component through the response end test fixture. The sensing component acquires the response signal, and the processing component generates the torsional dynamic characteristic test results of the flexible disk under test based on the response signal.

9. The method for testing the dynamic characteristics of a flexible disk according to claim 8, characterized in that, Before controlling the torsional vibrator to send an excitation signal according to the test parameters, the method further includes: Based on the aforementioned testing requirements, modal analysis is performed on the 3D digital model data of the excitation end test fixture and the 3D digital model data of the response end test fixture to obtain modal analysis results. Based on the modal analysis results, determine whether both the excitation end test fixture and the response end test fixture meet the test requirements; If the 3D model data of the excitation end test fixture or the response end test fixture does not meet the test requirements, the target fixture that does not meet the test requirements shall be redesigned.

10. The method for testing the dynamic characteristics of a flexible disk according to claim 8, characterized in that, After determining whether both the excitation-end test fixture and the response-end test fixture meet the test requirements based on the modal analysis results, the process further includes: If both the excitation end test fixture and the response end test fixture meet the test requirements, then one end of the flexible disk to be tested is clamped by the excitation end test fixture, and the other end of the flexible disk to be tested is clamped by the response end test fixture.

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