Uuv propulsion system reliability autoclave test system and method

Abstract

This invention relates to the field of electromechanical technology, and discloses a pressure vessel testing system and method for the reliability of a UUV propulsion system. The system includes a power supply, a host computer, a main control board, a first watertight socket, a junction box, a watertight cable, a mounting base, and a pressure vessel. The propulsion system under test and the junction box are housed within the pressure vessel, connected by a watertight cable. Watertight plugs are installed at pre-drilled outlet holes in the pressure vessel's bulkhead, and the first watertight socket, connected to the junction box, is installed on the watertight plugs. The main control board receives control commands from the host computer and sends them to the propulsion system under test. It also receives and stores feedback operating data and fault signals, outputting them to the host computer. Furthermore, it converts water leakage fault signals and issues an alarm upon confirming a water leakage fault. This invention can significantly verify the reliability of a UUV propulsion system and mitigate existing risks, playing a crucial role in improving the safety and reliability of UUV propulsion systems.

Description

Technical Field

[0001] This invention relates to the field of electromechanical technology, and more specifically, to a pressure vessel testing system and method for the reliability of a UUV propulsion system. Background Technology

[0002] The propulsion system is crucial for the normal operation of a UUV (Unmanned Underwater Vehicle). It typically consists of a watertight motor, controller, propeller, and duct. Before underwater testing, the propulsion system's performance is usually assessed only for the watertight motor and controller. The performance of the watertight motor under no-load and loaded conditions is evaluated in air or in a water tank. Loading (torque load) is generally achieved through towing, where the torque is a pre-defined, ideal torque, which differs from the torque of the watertight motor with a propeller during actual underwater operation of the UUV.

[0003] 1. Due to potential deviations in propeller machining, the theoretically designed power and the actual operating power may differ significantly at the same rotational speed, which can cause difficulties in setting protection values ​​such as the current threshold in the controller program.

[0004] 2. When a UUV is running underwater, the watertight motor needs to be started frequently under certain operating conditions. Due to the influence of water flow, the load on the watertight motor will fluctuate greatly, which will greatly affect the operating performance of the watertight motor without position control.

[0005] 3. In deep water, the water pressure on the dynamic seal of the watertight motor increases, which increases the compression of the dynamic seal O-ring. This increases the friction between the O-ring and the shaft, resulting in an increase in the torque of the watertight motor at the same speed. This has a significant impact on the operating performance of low-power watertight motors.

[0006] 4. Under different water pressures, due to improper material selection, the dynamic seal may deform under the influence of high water pressure in deep water, leading to water leakage in the watertight motor, which seriously affects the safety and reliability of UUV operation.

[0007] When testing a watertight motor using a drag-and-drop method in air or a regular water tank, the four risks mentioned above cannot be tested and verified. Summary of the Invention

[0008] The purpose of this invention is to address the technical problems existing in the prior art by providing a pressure vessel test system and method for the reliability of UUV propulsion systems. This system can verify the reliability of UUV propulsion systems and mitigate existing risks. It has a simple structure, reliable functions, and is easy to implement.

[0009] To address the problems mentioned above, the technical solution adopted by this invention is as follows:

[0010] This invention provides a pressure vessel testing system for the reliability of a UUV propulsion system. The testing system includes a power supply, a host computer, a main control board, a first watertight socket, a junction box, a watertight cable, a mounting base, and a pressure vessel.

[0011] An installation base is provided inside the pressure vessel, and a propulsion system to be tested and a junction box are installed on the installation base. The propulsion system to be tested and the junction box are connected by a watertight cable. A watertight plug is installed at the pre-reserved outlet hole in the pressure vessel wall, and a first watertight socket connected to the junction box is installed on the watertight plug. The power supply, main control board and host computer are located outside the pressure vessel.

[0012] The power supply provides power to the propulsion system under test; the host computer sends control commands to the main control board; the main control board receives the control commands and sends them to the propulsion system under test; the main control board also receives the operating data and fault signals fed back by the propulsion system under test, stores them and outputs them to the host computer, and converts the water leakage fault signal therein, and issues an alarm prompt after confirming the water leakage fault.

[0013] Furthermore, the main control board includes a central processing unit, a first communication module, a second communication module, a conversion module, an alarm module, and a data storage module; the second communication module receives control commands from the host computer and outputs them to the central processing unit.

[0014] The central processing unit outputs the control commands to the propulsion system under test through the first communication module, and receives the operating data fed back by the propulsion system under test; it also outputs the operating data to the data storage module for storage, and uploads it to the host computer.

[0015] The conversion module receives the water leakage fault signal output by the propulsion system under test, converts it, and outputs it to the central processing unit. Based on the received signal, the central processing unit, upon determining that a water leakage fault has occurred, outputs an alarm signal to the alarm module to provide an alarm notification.

[0016] Furthermore, the central processing unit receives other fault information output by the propulsion system under test through the first communication module, and feeds back the other fault information to the host computer through the second communication module, so that the host computer can display and monitor them.

[0017] Furthermore, the power supply is a DC regulated power supply, which is connected to the first watertight socket via a DC bus; the host computer is an industrial control computer, which is connected to the main control board via a communication box; the main control board is also connected to the first watertight socket via a low-voltage cable.

[0018] Furthermore, the junction box is a watertight structure with second watertight sockets installed at both ends. The two second watertight sockets are respectively connected to the propulsion system under test and the first watertight socket via watertight cables.

[0019] Furthermore, the propulsion system under test and the junction box are both mounted on the mounting base using a fixing fixture.

[0020] This invention also provides a method for testing the reliability of a UUV propulsion system using a pressure vessel, the specific steps of which include the following:

[0021] The airtightness of the propulsion system and junction box under test was checked, and then it was placed in a pressure vessel for fixation.

[0022] Electrical connections are made between the propulsion system under test and the junction box, as well as between the junction box and the DC regulated power supply, the main control board and the industrial control computer.

[0023] After the system is powered on, a functional check is performed on the propulsion system under test. The industrial control computer determines that the propulsion system under test is functioning normally based on the received operating data, then the power is cut off and the pressure vessel is closed.

[0024] The pressure vessel is filled with water, powered on, and different water pressures are applied to the pressure vessel according to different working conditions. The industrial control computer controls the operation of the propulsion system under test and performs reliability testing on the propulsion system under test.

[0025] Furthermore, the industrial control computer controls the operating status of the propulsion system under test and performs reliability testing on the propulsion system under test, specifically including:

[0026] The propulsion system under test is controlled to operate at different given speeds, and monitored by an industrial control computer and a DC regulated power supply. If the propulsion system under test operates normally at the given speed, it is considered reliable.

[0027] Furthermore, the industrial control computer controls the operating status of the propulsion system under test and performs reliability testing on the propulsion system under test, specifically including:

[0028] If the speed of the propulsion system under test is switched under different water pressures, and if the voltage and current of the DC bus do not fluctuate drastically, the response time of the propulsion system under test meets the requirements, and it operates normally and stably at the switched speed, and the main control board does not issue an alarm and the industrial control computer does not receive fault feedback, then the propulsion system under test is considered to have reliable operating performance.

[0029] Under different water pressures, the propulsion system under test is continuously started and stopped. If the response time of the propulsion system under test meets the requirements and eventually runs normally and stably at the given speed, the propulsion system under test is considered to have reliable operating performance.

[0030] Furthermore, the industrial control computer controls the operating status of the propulsion system under test and performs reliability testing on the propulsion system under test, specifically including:

[0031] The propulsion system under test is controlled to run at low speed, and the water pressure in the pressure vessel is gradually and slowly increased. The industrial control computer monitors for water leakage alarm feedback. If the propulsion system under test runs normally and the main control board does not indicate a water leakage alarm, the sealing performance of the propulsion system under test is considered reliable.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] This invention places the propulsion system under test in a pressure vessel for performance evaluation, making the performance evaluation of the watertight motor closer to the actual underwater operating conditions. This can greatly verify the reliability of the UUV propulsion system and avoid existing risks, filling the current gap in the simulation of underwater reliability testing of UUV propulsion systems. It plays an important role in improving the safety and reliability of UUV propulsion systems and provides an important reference for the design, manufacturing and performance optimization of UUV watertight motors. Attached Figure Description

[0034] To more clearly illustrate the solutions in this invention, a brief introduction to the accompanying drawings used in the description of the embodiments will be provided below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort. Wherein:

[0035] Figure 1 This is a schematic diagram of the pressure vessel test system for the reliability of the UUV propulsion system of the present invention.

[0036] Figure 2 This is a schematic diagram of the main control board in this invention.

[0037] Figure 3 This is a flowchart of the pressure vessel test method for the reliability of the UUV propulsion system of the present invention.

[0038] The reference numerals in the attached diagram are explained as follows: 1-DC regulated power supply, 2-DC busbar, 3-weak current wiring, 4-main control board, 5-industrial control computer, 6-communication box, 7-first watertight socket, 8-second watertight socket, 9-fixed fixture, 10-junction box, 11-watertight cable, 12-propulsion system under test, 13-mounting base, 14-pressure vessel, 41-central processing unit, 42-first communication module, 43-second communication module, 44-conversion module, 45-alarm module, 46-data storage module. Detailed Implementation

[0039] 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. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as “length,” “width,” “upper,” “lower,” “left,” “right,” “front,” “rear,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” indicate orientations or positions based on the orientations or positions shown in the accompanying drawings and are for ease of description only, and should not be construed as limiting the technical solution.

[0040] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion; the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order. In the specification, claims, and accompanying drawings of this invention, when an element is referred to as "fixed to," "mounted to," "disposed of," or "connected to" another element, it may be directly or indirectly located on that other element. For example, when an element is referred to as "connected to" another element, it may be directly or indirectly connected to that other element.

[0041] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] See Figure 1 As shown, the present invention provides a UUV propulsion system reliability pressure vessel test system. The test system includes a power supply, a host computer, a main control board 4, a first watertight socket 7, a mounting base 13, a junction box 10, a watertight cable 11, and a pressure vessel 14.

[0043] The pressure vessel 14 is equipped with a mounting base 13, providing fixed space for the propulsion system 12 under test and the junction box 10. Specifically, the propulsion system 12 and the junction box 10 are mounted on the mounting base 13, and are connected via a watertight cable 11. Watertight plugs are installed at the pre-reserved outlet holes in the pressure vessel 14, and a first watertight socket 7 connected to the junction box 10 is installed on the watertight plugs. The power supply and main control board 4 are located outside the pressure vessel 14 and are respectively connected to the first watertight socket 7. The host computer is located outside the pressure vessel and is connected to the main control board 4.

[0044] Furthermore, the power supply is a DC regulated power supply 1, which is connected to the first watertight socket 7 via a DC bus 2 to provide power to the propulsion system 12 under test.

[0045] Specifically, the DC regulated power supply 1 provides power to the propulsion system under test 12 and monitors the voltage and current data of the DC bus 2 after electrical wiring conversion through the DC bus 2, the first watertight socket 7, the second watertight socket 8, the junction box 10, and the watertight cable 11, ensuring that the propulsion system under test 12 can work normally.

[0046] Furthermore, the host computer is an industrial control computer 5, which is connected to the main control board 4 via a communication box 6 for convenient signal transmission. The main control board 4 is also connected to the first watertight socket 7 via a low-voltage cable 3.

[0047] In this embodiment, the industrial control computer 5 acts as the host computer, sending control commands to the main control board 4 via the communication box 6. The main control board 4 receives the control commands and, after electrical wiring conversion via the first watertight socket 7, the second watertight socket 8, the junction box 10, and the watertight cable 11, sends them to the propulsion system 12 under test, controlling its operation. Simultaneously, the main control board 4 receives operating data such as speed, voltage, current, and temperature from the propulsion system 12 under test, as well as fault signals such as water leakage. It converts the water leakage fault signals to determine if a water leakage fault exists and issues an alarm when a water leakage fault is detected. The main control board 4 also stores the operating data and fault data and feeds back other fault conditions to the host computer for display and monitoring.

[0048] For further details, please refer to [link / reference]. Figure 2 As shown, the main control board 4 includes a central processing unit 41, a first communication module 42, a second communication module 43, a conversion module 44, an alarm module 45, and a data storage module 46; the second communication module 43 receives control commands from the host computer and outputs them to the central processing unit 41.

[0049] The central processing unit 41 outputs the control commands to the propulsion system 12 under test through the first communication module 42, thereby controlling the operation of the propulsion system 12 under test. The central processing unit 41 also receives the operating data fed back by the propulsion system 12 under test through the first communication module 42, and outputs the operating data to the data storage module 46 for storage, and also uploads it to the host computer.

[0050] The conversion module 44 receives the water leakage fault signal output by the propulsion system 12 under test, and converts the analog fault signal of the water leakage alarm lead into a digital signal and outputs it to the central processing unit 41. The central processing unit 41 determines whether there is a water leakage fault based on the received signal, and outputs an alarm signal to the alarm module 45 to provide an alarm prompt when it determines that a water leakage fault has occurred.

[0051] The central processing unit 41 receives other fault conditions of the propulsion system 12 under test through the first communication module 42, and feeds back the other fault conditions to the host computer through the second communication module 43, so that the host computer can display and monitor them.

[0052] In this embodiment, the main control board 4 can be equipped with chips such as DSP, microcontroller, and ARM that have communication functions, and is equipped with indicator lights, buzzers, and other devices to provide alarm prompts for water leakage faults, which is intuitive and convenient. Because the propulsion system 12 under test, such as some watertight motors, is limited by structural space, the lead wire of the water leakage detection board cannot be connected to the main control board, or due to inherent requirements, the water leakage fault signal is not directly judged and processed by the controller of the watertight motor. Therefore, during testing, it needs to be converted by the conversion module 44 of the main control board 4, and then judged by the central processing unit 41 before being alarmed by the alarm module 45. For other faults besides water leakage, the controller of the watertight motor directly judges and processes the faults and outputs the results to the host computer. The host computer provides feedback based on the received fault information, facilitating the monitoring and display of the propulsion system 12 under test and ensuring its operational reliability.

[0053] In this embodiment, the main control board 4 has a simple structure and reliable function, facilitates data transmission, and can provide alarm prompts and fault feedback, thereby ensuring the reliability of the propulsion system 12 under test and further ensuring the reliability of the entire test system.

[0054] Furthermore, the junction box 10 is a watertight structure with second watertight sockets 8 installed at both ends. One end of the second watertight socket 8 is connected to the propulsion system 12 under test via a watertight cable 11, and the other end of the second watertight socket 8 is connected to the first watertight socket 7 on the wall of the pressure vessel 14 via a watertight cable 11. After conversion, it is connected to the external debugging wiring, and electrical matching wiring is performed inside the junction box 10.

[0055] Furthermore, to ensure reliable installation, the propulsion system 12 and the junction box 10 under test are respectively mounted on the mounting base 13 using fixing fixtures 9.

[0056] In this embodiment, after the pressure vessel 14 is closed and filled with water, the water pressure inside the pressure vessel 14 can be adjusted manually. The pressure vessel 14 should be able to be pressurized to at least 5MPa, thereby providing different water depth conditions for the propulsion system 12 to be tested.

[0057] In this embodiment, after the basic test of the watertight motor of the propulsion system 12 under test is completed, and after the airtightness check of the propulsion system 12 and junction box 10 under test is completed and found to be correct, the propulsion system 12 under test is placed in the pressure vessel 14 for reliability testing under different water pressures. During the test, the water pressure is kept stable and there should be no drastic fluctuations.

[0058] Specifically, under different water pressures, the industrial control computer 5 sets the corresponding rotational speed of the propulsion system 12 under test. After operation, it monitors the DC bus voltage and current displayed by the DC regulated power supply 1, as well as the rotational speed received by the industrial control computer 5. The actual rotational speed must be stable and meet the requirements. The DC bus voltage and current data must not fluctuate significantly, and the industrial control computer 5 must not receive any fault feedback such as water leakage. Only then can the system be considered to be operating stably and reliably. Under different water pressures, the industrial control computer 5 continuously switches the rotational speed of the propulsion system 12 under test (including forward and reverse rotation switching). The rotational speed response time of the propulsion system 12 under test must meet the requirements, and the system must ultimately operate stably and reliably.

[0059] See Figure 2 As shown, the present invention also provides a method for testing the reliability of a UUV propulsion system using a pressure vessel. The specific steps of this testing method include the following:

[0060] Step S1: Perform an airtightness check on the propulsion system 12 and junction box 10 to be tested, and then place the propulsion system 12 and junction box 10 to be tested into the pressure vessel 14 for fixation;

[0061] Step S2: Electrically connect the entire system, that is, electrically connect the propulsion system 12 under test and junction box 10, and connect junction box 10 to DC regulated power supply 1, main control board 4 and industrial control computer 5 respectively.

[0062] Specifically, the selected watertight cable 11 and DC bus 2 must be able to withstand the current of the propulsion system 12 under full load or even overload conditions.

[0063] Step S3: After the system is powered on, the function of the propulsion system 12 under test is checked. After the propulsion system 12 under test is judged to be normal by the feedback operation data received by the industrial control computer 5, the power is cut off and the pressure vessel 14 is closed.

[0064] Step S4: Fill the pressure vessel 14 with water, turn on the power, and apply different water pressures to the pressure vessel 14 according to different operating conditions. The industrial control computer 5 controls the operating status of the propulsion system 12 under test and performs reliability tests on the propulsion system 12 under test. Specifically, the appropriate water pressure can be selected according to the actual operating conditions, and several different water pressures can be tested.

[0065] Furthermore, the reliability test specifically includes:

[0066] 1. Power on the system and set the propulsion system 14 under test to a low speed to run it. Gradually and slowly increase the water pressure in the pressure vessel 14. Monitor the water leakage alarm information through the industrial control computer 5. If the propulsion system 12 under test runs normally and stably throughout the process and the main control board 4 does not indicate any abnormalities such as water leakage alarm, it is considered normal and reliable.

[0067] In this embodiment, if a water leakage alarm occurs during pressurization, the pressure should be immediately released and the water in the pressure vessel 14 should be drained. The possible cause is that the design, processing, and material selection of the dynamic seal and other sealing structures need improvement, and corresponding optimizations can be made. This method is mainly used to verify the reliability of the sealing performance of the watertight motor's dynamic seal and other sealing components in the UUV propulsion system at its maximum operating depth.

[0068] 2. Power on the system and run it at different speeds within the range of the propulsion system 12 under test. The operation of the propulsion system 12 under test is monitored by the industrial control computer 5 and the DC regulated power supply 1. If the propulsion system 12 under test runs normally and stably at the given speed, and the main control board 4 does not issue an alarm prompt and the industrial control computer 5 does not receive fault feedback, it is considered to be normal and reliable.

[0069] In this embodiment, if the propulsion system 9 under test fails to reach high speeds, such as a given speed of 1600 r / min but an actual stable operating speed of 1500 r / min, it indicates that the actual output power of the propeller in the propulsion system 9 under test is greater than the design value, and the current threshold set in the watertight motor controller is too low, allowing for optimization. This method primarily aims to verify whether the theoretical and actual values ​​of the propeller design are consistent. If the difference is significant, not only can the watertight motor be optimized and adjusted, but related equipment in the UUV propulsion system can also be optimized and adjusted.

[0070] 3. Power on and simulate actual operating conditions. Continuously switch the rotational speed of the propulsion system 12 under different water pressures, such as switching between forward and reverse rotation, high and low speed, running to stopping, and stopping to running. During the switching process, if the voltage and current of the DC bus 2 monitored by the DC regulated power supply 1 do not fluctuate drastically, the response time of the propulsion system 12 meets the requirements, and it eventually operates normally and stably at the switched speed, and the main control board 4 does not issue an alarm and the industrial control computer 5 does not receive fault feedback, then it is considered normal and reliable.

[0071] In this embodiment, if the response time of the propulsion system 9 under test is slow, or if the motor switching speed fluctuates, the relevant parameters in the watertight motor controller can be modified for optimization. This method primarily aims to verify the reliability of the propulsion system 9 under test in terms of forward and reverse switching and stepless speed regulation under actual water depth conditions.

[0072] 4. Power on and simulate actual operating conditions. Control the propulsion system 12 under test to start and stop continuously under different water pressures. If the response time of the propulsion system 9 under test meets the requirements and eventually runs normally and stably at the given speed, and the main control board 4 does not alarm and the industrial control computer 5 does not receive fault feedback, then it is considered normal and reliable.

[0073] In this embodiment, under low water pressure conditions, the propulsion system 9 under test can start and stop normally. However, under high water pressure conditions, the response time of the propulsion system 9 under test is slow, or it may even fail to start to the given speed. The reason may be that the higher the water pressure, the greater the compression of the O-ring of the watertight motor's dynamic seal, resulting in increased friction between the O-ring and the shaft. This causes the starting torque to exceed the starting capacity of the watertight motor. This can be optimized by modifying the corresponding structure of the watertight motor's dynamic seal and the relevant parameters in the watertight motor controller. Specifically, this mainly targets low-power watertight motors without position control, primarily to verify the ability of watertight motors without position control to adapt to severe torque fluctuations under actual water depth conditions.

[0074] This invention is used for verifying the dynamic sealing performance of the watertight motor in the propulsion system of an underwater unmanned vehicle (UUV) (generally composed of a watertight motor, controller, propeller, duct, etc.) and for evaluating the operational performance of the UUV propulsion system under simulated underwater actual working conditions. It is suitable for reliability testing of UUV propulsion systems, can guarantee the actual underwater working environment of the UUV propulsion system, and can complete the reliability test of the UUV propulsion system's operational performance in a laboratory environment by simulating the corresponding water depth conditions in a pressure vessel.

[0075] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A pressure vessel testing system for the reliability of a UUV propulsion system, characterized in that: The testing system includes a power supply, a host computer, a main control board, a first watertight socket, a junction box, watertight cables, a mounting base, and a pressure vessel; An installation base is provided inside the pressure vessel, and a propulsion system to be tested and a junction box are installed on the installation base. The propulsion system to be tested and the junction box are connected by a watertight cable. A watertight plug is installed at the pre-reserved outlet hole in the pressure vessel wall, and a first watertight socket connected to the junction box is installed on the watertight plug. The power supply, main control board and host computer are located outside the pressure vessel. The power supply provides power to the propulsion system under test; the host computer sends control commands to the main control board; the main control board receives the control commands and sends them to the propulsion system under test; the main control board also receives the operating data and fault signals fed back by the propulsion system under test, stores them and outputs them to the host computer, and converts the water leakage fault signals therein, and provides an alarm prompt after confirming the water leakage fault. The main control board includes a central processing unit, a first communication module, a second communication module, a conversion module, an alarm module, and a data storage module; the second communication module receives control commands from the host computer and outputs them to the central processing unit. The central processing unit outputs the control commands to the propulsion system under test through the first communication module, and receives the operating data fed back by the propulsion system under test; it also outputs the operating data to the data storage module for storage, and uploads it to the host computer. The conversion module receives the water leakage fault signal output by the propulsion system under test, converts it, and outputs it to the central processing unit; the central processing unit, based on the received signal, outputs an alarm signal to the alarm module to provide an alarm prompt when it determines that a water leakage fault has occurred. The central processing unit receives other fault information output by the propulsion system under test through the first communication module, and feeds back the other fault information to the host computer through the second communication module, so that the host computer can display and monitor them. The junction box is a watertight structure with second watertight sockets installed at both ends. The two second watertight sockets are respectively connected to the propulsion system under test and the first watertight socket via watertight cables.

2. The UUV propulsion system reliability pressure vessel testing system according to claim 1, characterized in that: The power supply is a DC regulated power supply, which is connected to the first watertight socket via a DC bus; the host computer is an industrial control computer, which is connected to the main control board via a communication box; the main control board is also connected to the first watertight socket via a low-voltage cable.

3. The UUV propulsion system reliability pressure vessel testing system according to claim 1, characterized in that: The propulsion system under test and the junction box are both mounted on the mounting base using a fixing fixture.

4. A test method based on the UUV propulsion system reliability pressure vessel test system according to any one of claims 1 to 3, characterized in that: The specific steps of this testing method include the following: The airtightness of the propulsion system and junction box under test was checked, and then it was placed in a pressure vessel for fixation. Electrical connections are made between the propulsion system under test and the junction box, as well as between the junction box and the DC regulated power supply, the main control board and the industrial control computer. After the system is powered on, a functional check is performed on the propulsion system under test. The industrial control computer determines that the propulsion system under test is functioning normally based on the received operating data, then the power is cut off and the pressure vessel is closed. The pressure vessel is filled with water, powered on, and different water pressures are applied to the pressure vessel according to different working conditions. The industrial control computer controls the operation of the propulsion system under test and performs reliability testing on the propulsion system under test.

5. The test method for the UUV propulsion system reliability pressure vessel test system according to claim 4, characterized in that: The industrial control computer controls the operation of the propulsion system under test and performs reliability tests on the propulsion system under test, specifically including: The propulsion system under test is controlled to operate at different given speeds, and monitored by an industrial control computer, a DC regulated power supply, and a main control board. If the propulsion system under test operates normally at the given speed, it is considered reliable.

6. The test method for the UUV propulsion system reliability pressure vessel test system according to claim 4, characterized in that: The industrial control computer controls the operation of the propulsion system under test and performs reliability testing on the propulsion system under test, specifically including: If the speed of the propulsion system under test is switched under different water pressures, and if the voltage and current of the DC bus do not fluctuate drastically, the response time of the propulsion system under test meets the requirements, and it operates normally and stably at the switched speed, and the main control board does not issue an alarm and the industrial control computer does not receive fault feedback, then the propulsion system under test is considered to have reliable operating performance. Under different water pressures, the propulsion system under test is continuously started and stopped. If the response time of the propulsion system under test meets the requirements and eventually runs normally and stably at the given speed, the propulsion system under test is considered to have reliable operating performance.

7. The test method for the UUV propulsion system reliability pressure vessel test system according to claim 4, characterized in that: The industrial control computer controls the operation of the propulsion system under test and performs reliability testing on the propulsion system under test, specifically including: The propulsion system under test is controlled to run at low speed, and the water pressure in the pressure vessel is gradually and slowly increased. The industrial control computer monitors for water leakage alarm feedback. If the propulsion system under test runs normally and the main control board does not indicate a water leakage alarm, the sealing performance of the propulsion system under test is considered reliable.

Images