Unmanned underwater vehicle propulsion motor performance degradation test device and method based on vibration stress

Abstract

The invention discloses an unmanned underwater vehicle propulsion motor performance degradation device and method based on vibration stress, and the device comprises a vibration stress simulation module, a load simulation module, a motor control module, a water tank, a pedestal and the like. Alternating stress influence of environmental stress such as waves, surges and ocean currents on a main shaft and a bearing of the motor on the unmanned underwater vehicle in water is simulated, and the performance degradation process of the propulsion motor is accelerated; the water tank is filled with seawater, the salinity of the seawater is adjusted, and different sea areas and depths where the propulsion motor is located are simulated; the performance degradation characteristic parameters of the propulsion motor of the unmanned underwater vehicle can be obtained by monitoring the characteristic parameters such as the rotation speed, the power and the vibration frequency of the propulsion motor in real time, and test data support is provided for research of a fault evolution mechanism of the propulsion motor of the unmanned underwater vehicle and construction of a performance degradation model of the propulsion motor.

Description

Technical Field

[0001] The present invention relates to the technical field of reliability testing, and particularly relates to a performance degradation test device for an unmanned underwater vehicle propulsion motor based on vibration stress. Background Art

[0002] Reliability testing is an important means to obtain product reliability data and is widely used in the function and performance assessment of underwater weapons. Compared with conventional tests, reliability tests take longer time and cost more, which can fully release product design risks and effectively assess and verify the various functions and performances of components.

[0003] Currently, the advanced methods of performance degradation technology mainly focus on the aerospace field. The underwater unmanned equipment started late in this field, resulting in a lack of mature performance degradation test methods and test devices in the field of unmanned underwater vehicles. Summary of the Invention

[0004] The present disclosure provides a performance degradation device for an unmanned underwater vehicle propulsion motor based on vibration stress, aiming to solve the problems in the prior art such as the lack of performance degradation test methods and test devices for underwater unmanned vehicles, the inability to conduct full-life cycle performance assessment and prediction for a single system or key components, unclear failure modes and mechanisms, lack of performance degradation trajectory models, insufficient accumulation of failure models and test data, and insufficient testability and state assessment capabilities for systems or components.

[0005] The performance degradation device for an unmanned underwater vehicle propulsion motor based on vibration stress provided by the present disclosure includes: a vibration stress simulation module, a load simulation module, a motor control module, a water tank, and a base.

[0006] The base includes: a slide rail, and a water tank support plate placed on the slide rail. A slider is provided under the water tank support plate to facilitate the sliding of the water tank and the water tank support plate together on the slide rail under the action of vibration stress;

[0007] The vibration stress simulation module is placed on the slide rail, the load simulation module and the water tank are both placed on the water tank support plate, the propulsion motor is fixed in the water tank, and the motor control module is fixed on the outer contour surface of the water tank housing;

[0008] The vibration stress simulation module is connected to the water tank and drives the water tank to move back and forth to provide stable excitation stress for the propulsion motor, simulating the vibration stress of the surge on the underwater vehicle;

[0009] The water tank is a sealed water tank, and forms a dynamic seal connection with the transmission shaft extending from the underwater propulsion motor through a flange. The part of the transmission shaft extending out of the water tank is connected to the load simulation module through a coupling, and the load simulation module is used to simulate the resistance suffered by the propulsion motor during operation.

[0010] Further, the vibration stress simulation module is connected to the water tank through a drive shaft fixed to the water tank housing at one end, driving the water tank to move.

[0011] Further, a structural member for fixing the propulsion motor is installed in the water tank to ensure the stable operation of the propulsion motor during the operation of the test bench.

[0012] Further, a structural member for installing the propulsion motor control module is provided at the top of the water tank for controlling the long-term stable operation of the propulsion motor.

[0013] Further, air-floating feet are also provided below the linear slide rail of the base for supporting and buffering vibration.

[0014] In addition, it also includes a motor performance monitoring and display module for recording and supervising the working state of the motor.

[0015] Compared with the prior art, the beneficial effects of the present disclosure are: (1) By providing radial vibration stress to the propulsion motor stably for a long time, simulating the alternating stress effects on the motor spindle and bearings caused by environmental stresses such as waves, swells, and ocean currents that the unmanned submersible is subjected to in water, it can accelerate the performance degradation process of the propulsion motor, filling the deficiencies in the lack of performance degradation test methods and test devices for underwater unmanned submersibles in the prior art; (2) It can adjust the salinity of seawater by filling seawater into the water tank to simulate different sea areas and depths where the propulsion motor is located; (3) It can obtain the performance degradation characteristic parameters of the unmanned submersible propulsion motor by real-time monitoring of characteristic parameters such as the rotation speed, power, and vibration frequency of the propulsion motor, providing test data support for the research on the fault evolution mechanism of the unmanned submersible propulsion motor and for constructing a performance degradation model of the propulsion motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By describing the exemplary embodiments of the present disclosure in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present disclosure will become more obvious. Among them, in the exemplary embodiment mode of the present disclosure, the same reference numerals generally represent the same components.

[0017] Figure 1 It is a schematic diagram of the system structure according to the exemplary embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The preferred embodiments of the present disclosure will be described in more detail below with reference to the drawings. Although the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0019] The present disclosure provides a performance degradation test device and method for an unmanned underwater vehicle propulsion motor based on vibration stress, which is proposed for the first time in the domestic field of unmanned underwater vehicles and has been practically applied through a scaled-down model of the propulsion motor.

[0020] An exemplary performance degradation test device for an unmanned underwater vehicle propulsion motor based on vibration stress is as shown in the appendix Figure 1 and includes: a vibration stress simulation module, a load simulation module, a motor control module, a water tank, and a base.

[0021] The vibration stress simulation module, the load simulation module, and the motor are all placed on the base. The vibration stress simulation module is connected to the water tank to provide stable excitation stress for the propulsion motor. The load simulation module is connected to the propulsion motor through a coupling to simulate the resistance suffered by the propulsion motor during operation. The motor control module is connected to the water tank through structural members to control the long-term stable operation of the propulsion motor. The water tank is a sealed water tank, which forms a dynamic seal connection with the underwater motor through a flange. The water tank is equipped with structural members for fixing the propulsion motor to ensure the stable operation of the propulsion motor during the operation of the test bench. The top of the water tank is a structural member for installing the propulsion motor control module. The base includes air-floating feet, linear slides, and a water tank support plate, and sliders are placed under the water tank support plate.

[0022] The device provides radial vibration stress to the propulsion motor stably and for a long time through the vibration stress simulation module, simulates the alternating stress effects of environmental stresses such as waves, surges, and ocean currents on the motor spindle and bearings when the unmanned underwater vehicle is in water, and accelerates the performance degradation process of the propulsion motor. By filling seawater into the water tank and adjusting the salinity of the seawater, different sea areas and depths where the propulsion motor is located are simulated. By real-time monitoring of characteristic parameters such as the rotation speed, power, and vibration frequency of the propulsion motor, the performance degradation characteristic parameters of the unmanned underwater vehicle propulsion motor are obtained, providing experimental data support for the research on the fault evolution mechanism of the unmanned underwater vehicle propulsion motor and for constructing a performance degradation model of the propulsion motor.

[0023] The performance degradation test method for an unmanned underwater vehicle propulsion motor based on this exemplary device mainly includes the following steps:

[0024] 1) Fill the water tank with seawater and adjust the salinity of the seawater to simulate different sea areas and depths where the propulsion motor is located.

[0025] 2) Turn on the driver, adjust the motor to an appropriate rotation speed, and adjust the braking torque of the brake to simulate the load torque of the propulsion motor during the navigation of the unmanned underwater vehicle.

[0026] 3) Turn on the modal exciter, adjust the modal exciter to the required excitation force, and keep the exciter running stably in this state for a long time.

[0027] 4) When a fault state of the propulsion motor is detected, the vibrator is turned off and the propulsion motor is turned off.

[0028] The above technical solutions are only exemplary embodiments of the present invention. For those skilled in the art, based on the disclosed application methods and principles of the present invention, it is very easy to make various types of improvements or deformations, not limited to the methods described in the above specific embodiments of the present invention. Therefore, the foregoing description is only preferred and does not have a limiting meaning.

Claims

1. An unmanned submersible propulsion motor performance degradation device based on vibration stress, characterized in that, Comprising: A vibration stress simulation module, a load simulation module, a motor control module, a water tank, and a base. Among them: The base includes: a slide rail, and a water tank support plate placed on the slide rail. A slider is provided under the water tank support plate; The vibration stress simulation module is placed on the slide rail, the load simulation module and the water tank are both placed on the water tank support plate. The propulsion motor is fixed inside the water tank, and the motor control module is fixed on the outer contour surface of the water tank housing; The vibration stress simulation module is connected to the water tank and drives the water tank to move back and forth; The water tank is a sealed water tank, and forms a dynamic seal connection with the transmission shaft extending out of the underwater propulsion motor through a flange. The part of the transmission shaft extending out of the water tank is connected to the load simulation module through a coupling. The load simulation module is used to simulate the resistance suffered by the propulsion motor during operation.

2. The device according to claim 1, characterized in that The vibration stress simulation module is connected to the water tank through a drive shaft fixed at one end to the water tank housing, and drives the water tank to move.

3. The device according to claim 1 or 2, characterized in that, Structural members for fixing the propulsion motor are provided inside the water tank.

4. The device according to claim 1, characterized in that, The propulsion motor control module is provided on the top of the water tank, and structural members for installing this module are provided on the top of the water tank.

5. The device according to claim 1, characterized in that Air floating feet are provided under the linear slide rail of the base.

6. The device according to claim 1, characterized in that, Also including: A motor performance monitoring and display module, used to record and monitor the working state parameters of the motor.

7. A method for testing the performance degradation of an unmanned underwater vehicle propulsion motor using the device according to any one of claims 1-6, comprising the following steps: Fill the water tank with seawater, and simulate different sea areas and depths where the propulsion motor is located by adjusting the salinity of the seawater; Turn on the driver, adjust the motor to a suitable speed, and adjust the braking torque of the brake to simulate the load torque of the propulsion motor during the navigation of the unmanned underwater vehicle; Turn on the modal exciter, adjust the modal exciter to the required exciting force, and keep the exciter running stably for a long time in this state; When it is detected that the propulsion motor appears in a fault state, turn off the exciter and turn off the propulsion motor.

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