A vibration noise reduction and demonstration verification test bench for underwater gliders

Abstract

The application discloses an underwater glider vibration noise reduction and demonstration verification test bed, which comprises a suspension device, a swing table, a water tank, a data acquisition analyzer, a vibration acceleration sensor, a force sensor, a hydrophone, an excitation force hammer and a sound level meter. The hydrophone is arranged in the water tank, and the water tank is used for submerging the underwater glider into water to test the wet modal characteristics of the underwater glider. The data acquisition analyzer is connected with the vibration acceleration sensor, the force sensor, the hydrophone and the sound level meter. The excitation force hammer is used for applying a preset excitation force to the underwater glider. The underwater glider vibration noise reduction and demonstration verification test bed is used for testing the vibration noise of the underwater glider in air and in submerged water under various operating conditions in a suspended state, and analyzing the vibration reduction and noise reduction of the underwater glider. The swing table is used for fixing the underwater glider and simulating the swing posture and the depth of the underwater glider for demonstration verification.

Description

Technical Field

[0001] The present invention relates to the field of testing technology, and in particular to a vibration noise reduction and demonstration verification test bench for an underwater glider. Background Art

[0002] With the rapid development of industry and science and technology, mechanical equipment has become increasingly sophisticated, high-speed, and lightweight. Vibration and noise issues have become a critical topic requiring widespread research and resolution in the field of engineering technology. The use of computers and the emergence of advanced vibration measurement and analysis technologies have led to significant advancements in the research and application of vibration theory and noise control technologies. A comprehensive theoretical framework has been established in areas such as fault signal processing, mechanical fault diagnosis, vibration and noise, bearing dynamics, and planetary gear dynamics. Numerous successful engineering applications have been achieved in industries such as machinery, shipbuilding, rail transportation, and aviation. However, existing test equipment suffers from limited functionality and poor environmental adaptability, making it unable to meet the diverse demands of diverse operating conditions and environments. Furthermore, it lacks the ability to simultaneously demonstrate and verify actual operating conditions. Summary of the Invention

[0003] In response to the above-mentioned defects or improvement needs of the prior art, the present invention provides an underwater glider vibration noise reduction and demonstration and verification test bench, which can simultaneously realize vibration noise detection and noise reduction debugging functions in dry and wet states through suspension equipment, water tanks, rocking platforms, etc., and can also conveniently realize water depth simulation and demonstration and verification functions.

[0004] To achieve the above objectives, the present invention adopts the following technical solutions.

[0005] In some embodiments, a vibration noise reduction and demonstration test bench for an underwater glider is provided, comprising:

[0006] Suspension equipment, swing platform, water tank, data acquisition analyzer, vibration accelerometer, force sensor, hydrophone, sound level meter, excitation hammer;

[0007] The suspension device is used to suspend the underwater glider, and the vibration acceleration sensor is connected to the underwater glider.

[0008] The hydrophone is disposed in the water tank, and the water tank is used to immerse the underwater glider in water to test the wet modal characteristics of the underwater glider;

[0009] The data acquisition and analysis instrument is connected to the vibration acceleration sensor, force sensor, hydrophone, and sound level meter;

[0010] The excitation hammer is used to apply a preset excitation force to the underwater glider, and the force sensor is connected to the excitation hammer;

[0011] The underwater glider vibration and noise reduction and demonstration and verification test bench is used to perform vibration and noise testing and vibration and noise reduction analysis on the underwater glider in a suspended state, in air and submerged in water, under various operating conditions;

[0012] The swing platform is used to fix the underwater glider and simulate and demonstrate the swing posture and depth of the underwater glider;

[0013] The underwater glider vibration noise reduction and demonstration and verification test bench is a comprehensive test bench that integrates vibration characteristic testing, noise reduction improvement, and demonstration and verification.

[0014] In some embodiments, the rocking platform includes an inner platform, an outer ring and a base, the inner platform is provided with a turntable, the underwater glider is fixed on the turntable, the inner platform can be rocked along a first direction relative to the outer ring, and the outer ring can be rocked along a second direction relative to the base; the turntable can rotate around the inner platform in a third direction, and the third direction is perpendicular to the first direction and the second direction.

[0015] In some embodiments, the underwater glider vibration noise reduction and demonstration and verification test bench further includes a posture sensor, which is used to feedback the rocking posture of the inner platform and outer ring of the rocking platform.

[0016] In some embodiments, the underwater glider vibration noise reduction and demonstration verification test bench further includes a demonstration control system, which is connected to the attitude sensor and is used to perform closed-loop control according to the rocking attitude of the inner platform and outer ring of the rocking platform and a preset working attitude;

[0017] The attitude sensor includes a first tilt sensor, a second tilt sensor, and a rotary encoder; the first tilt sensor is used to detect the angle of swing along the first direction, the second tilt sensor is used to detect the angle of swing along the second direction, and the rotary encoder is used to detect the angle of rotation about the third direction. The underwater glider is equipped with a built-in tilt sensor for feeding back the roll angle and pitch angle of the underwater glider itself;

[0018] The underwater glider vibration noise reduction and demonstration and verification test bench also includes a demonstration and verification module, which is used to compare the underwater glider's own roll angle and pitch angle with the angle of swing along the first direction detected by the first tilt sensor and the angle of swing along the second direction detected by the second tilt sensor to obtain a demonstration and verification result.

[0019] In some embodiments, the underwater glider vibration noise reduction and demonstration and verification test bench further includes a pressure source and an interface tooling. The pressure source has a built-in first pressure sensor and is connected to the interface tooling. The interface tooling is connected to the pressure-taking pipeline of the underwater glider and is used to provide pressure in real time to simulate the water depth state of the underwater glider when it is working.

[0020] The pressure source can provide stable static pressure through closed-loop control, and the first pressure information provided by the built-in first pressure sensor of the pressure source is fed back in real time;

[0021] The pressure-taking pipeline of the underwater glider is also connected to the second pressure sensor built into the underwater glider, which feeds back the second pressure information in the pressure-taking pipeline in real time. By comparing the first pressure information and the second pressure information fed back by the first pressure sensor and the second pressure sensor, the water depth demonstration and verification is achieved.

[0022] In some embodiments, the pressure source includes a hydraulic regulation system, the hydraulic regulation system is connected to the demonstration control system, and the demonstration control system is used to control the hydraulic regulation system to control the pressure according to a preset pressure.

[0023] In some embodiments, the hydraulic control system is composed of a stepless pressure regulation circuit, which can provide a stable static hydraulic pressure in the range of 0-10 MPa.

[0024] In some embodiments, the suspension device has casters for moving the suspension device to a target position;

[0025] The caster also has a locking mechanism for locking and fixing the suspension device at a target position.

[0026] In some embodiments, the suspension device comprises a suspension beam and a plurality of suspension units, wherein the plurality of suspension units are arranged on the suspension beam, each suspension unit comprises a motor, a hanging rope, a strap, and a pulley, wherein the pulley, the motor, the hanging rope, and the strap are connected in sequence, the suspension beam is an I-beam structure, the pulleys are arranged in pairs, a gap is formed between the pair of pulleys, and the pair of pulleys are embedded in the I-beam structure of the suspension beam;

[0027] The suspension units can be configured to independently suspend the underwater glider to be tested, or multiple suspension units can work together to suspend the underwater glider to be tested, depending on the test requirements.

[0028] In some embodiments, it is characterized in that a limit block is provided on the hanging rope, a limit ring is provided on the motor, the hanging rope passes through the limit ring, one end is connected to the motor, and the other end is connected to the strap, and the limit block is provided below the limit ring;

[0029] The lanyard is detachable and replaceable. There are three types of lanyards, which are divided into "soft" lanyards, "moderate" lanyards, and "hard" lanyards according to their own natural frequencies. During testing, one or more of the three types can be configured according to test requirements.

[0030] Compared to the prior art, the present invention has the following beneficial effects: the underwater glider vibration noise reduction and demonstration test bench of the present application can realize vibration noise detection and noise reduction debugging functions through the suspension equipment, and can also conveniently realize demonstration and verification functions through the swing platform. In some embodiments, underwater gliders and other equipment can be suspended, and single-point, two-point, or multi-point suspension equipment can be used. By setting the suspension points, the underwater glider can be made to exhibit different pitch and roll states, and the equipment suspension posture can be automatically adjusted as needed. In some embodiments of the present application, a test system consisting of a data acquisition and analysis instrument, a vibration accelerometer, a force sensor, a hydrophone, an excitation hammer, etc. can be equipped to perform vibration and noise testing on the equipment under various operating conditions such as in air and submerged in water to support vibration reduction and noise reduction analysis. In some embodiments, the dry modal characteristics of the equipment can be tested in various suspension postures. In some embodiments, a water tank is introduced to immerse the equipment in water in various suspension postures to test the wet modal characteristics of the equipment.

[0031] In addition, the underwater glider vibration noise reduction and demonstration verification test bench of the present application can also conveniently realize demonstration verification functions. Specifically, the demonstration control system realizes the swing control of the swing platform, synchronously receives the signal feedback of the demonstration equipment on the lateral and longitudinal tilt, forms a closed-loop control, and simulates the posture of the demonstration equipment in operation. At the same time, the pressure sensor of the demonstration equipment is connected to the pressure source, and the pressure is fed back in real time to simulate the water depth state of the equipment when it is working;

[0032] Furthermore, the underwater glider vibration noise reduction and demonstration verification test bench of this application can timely improve relevant parameters, and testing can be carried out immediately after the improvement. Moreover, during the demonstration and verification, experimental vibration characteristic testing can also be carried out, which can achieve demonstration during testing and testing during demonstration. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The figure is a schematic diagram of the overall process of an underwater glider vibration noise reduction and demonstration and verification test bench according to one embodiment of the present invention.

[0034] Figure 2 This is an overall structural block diagram of the underwater glider vibration noise reduction and demonstration and verification test bench in some embodiments of the present application.

[0035] Figure 3 This is a schematic diagram of the overall structure of the suspension device in some embodiments of the present application.

[0036] Figure 4 Schematic diagram of dry modal characteristic testing performed on a test bench in some embodiments of the present application.

[0037] Figure 5 Schematic diagram of wet modal characteristic testing performed on a test bench in some embodiments of the present application.

[0038] Figure 6 This is a partial structural diagram of the suspension device in some embodiments of the present application.

[0039] Figure 7 This is a partial structural diagram of the suspension device in some embodiments of the present application.

[0040] Figure 8 This is a partial structural diagram of the suspension device in some embodiments of the present application.

[0041] Figure 9 Schematic diagram of a test system in some embodiments of the present application. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "transverse," "longitudinal," "top," "bottom," "inner," "outer," and "circumferential" and the like, indicating directions or positions, are based on the directions or positions shown in the accompanying drawings. The interpretation of such terms should be based on the perspective of persons skilled in the art.

[0044] In the present invention, unless otherwise expressly defined or limited, terms such as "disposed," "installed," "connected," "connected," and "fixed" should be broadly understood from the perspective of those skilled in the art. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; "connected" may refer to a direct connection or an indirect connection through an intermediate medium, and may refer to internal communication between two elements or an interaction between two elements, unless otherwise expressly defined. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0045] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0046] Figure 1 This is an overall structural block diagram of the underwater glider vibration noise reduction and demonstration and verification test bench in some embodiments of the present application.

[0047] refer to Figure 1 In some embodiments, a vibration noise reduction and demonstration test bench for an underwater glider is provided, comprising: a suspension device 100, a rocking platform 200, a water tank 300, a data acquisition and analysis instrument 400, a vibration acceleration sensor 500, a force sensor 600, a hydrophone 700, a sound level meter 170, and an excitation hammer 800;

[0048] The suspension device is used to suspend the underwater glider, and the vibration acceleration sensor is connected to the underwater glider.

[0049] The hydrophone is disposed in the water tank, and the water tank is used to immerse the underwater glider in water to test the wet modal characteristics of the underwater glider;

[0050] The data acquisition and analysis instrument is connected to the vibration acceleration sensor, force sensor, hydrophone, and sound level meter;

[0051] The excitation hammer is used to apply a preset excitation force to the underwater glider, and the force sensor is connected to the excitation hammer;

[0052] The underwater glider vibration and noise reduction and demonstration and verification test bench is used to perform vibration and noise testing and vibration and noise reduction analysis on the underwater glider in a suspended state, in air and submerged in water, under various operating conditions;

[0053] The swing platform is used to fix the underwater glider and simulate and demonstrate the swing posture and depth of the underwater glider;

[0054] The underwater glider vibration noise reduction and demonstration and verification test bench is a comprehensive test bench that integrates vibration characteristic testing, noise reduction improvement, and demonstration and verification.

[0055] In the embodiment of the present application, the underwater glider is a device to be tested, a simulation device, or a demonstration and verification device. Of course, it is understandable that the device to be tested, the simulation device, or the demonstration and verification device of the present application may also be other devices with corresponding requirements.

[0056] Figure 2 This is an overall structural block diagram of the underwater glider vibration noise reduction and demonstration and verification test bench in some embodiments of the present application.

[0057] refer to Figure 2 In some embodiments, the rocking platform 200 includes an inner platform 201, an outer ring 202, and a base 203. The inner platform has a turntable 206. The underwater glider 1000 is fixed to the turntable 201. The inner platform 201 can rock relative to the outer ring 202 in a first direction, which can be the longitudinal direction of the underwater glider. The outer ring 202 can rock relative to the base 203 in a second direction, which can be the transverse direction of the underwater glider. The turntable can rotate around the inner platform in a third direction, which is perpendicular to the first and second directions.

[0058] In some embodiments, the underwater glider vibration noise reduction and demonstration and verification test bench further includes a posture sensor 900, which is used to feedback the rocking posture of the inner platform and the outer ring of the rocking platform.

[0059] In some embodiments, the underwater glider vibration noise reduction and demonstration verification test bench also includes a demonstration control system 110, which is connected to the attitude sensor and is used to perform closed-loop control based on the rocking attitude of the inner platform and outer ring of the rocking platform and the preset working attitude.

[0060] In some embodiments, the attitude sensor includes a first inclination sensor, a second inclination sensor, and a rotary encoder; the first inclination sensor is used to detect the angle of swing along the first direction, the second inclination sensor is used to detect the angle of swing along the second direction, and the rotary encoder is used to detect the angle of rotation around a third direction. The underwater glider is equipped with a built-in inclination sensor 140 for feeding back the underwater glider's own roll angle and pitch angle.

[0061] In some embodiments, the underwater glider vibration noise reduction and demonstration and verification test bench also includes a demonstration and verification module 150, which is used to compare the underwater glider's own roll angle and pitch angle with the angle of swing along the first direction detected by the first tilt sensor and the angle of swing along the second direction detected by the second tilt sensor to obtain a demonstration and verification result.

[0062] In some embodiments, the underwater glider vibration noise reduction and demonstration verification test bench further comprises a pressure source 160, an interface tool, the pressure source is provided with a first pressure sensor 120 and is connected with the interface tool, the interface tool is connected with a pressure taking pipeline of the underwater glider, and is used for providing pressure in real time to simulate the water depth state of the underwater glider during working.

[0063] The pressure source can provide stable static pressure through closed-loop control, and the first pressure sensor built-in the pressure source provides first pressure information in real time.

[0064] The pressure taking pipeline of the underwater glider is further connected with a second pressure sensor 180 built-in the underwater glider, and is used for feeding back second pressure information in the pressure taking pipeline in real time, and the water depth demonstration verification is realized by comparing the first pressure information and the second pressure information fed back by the first pressure sensor and the second pressure sensor.

[0065] In some embodiments, the pressure source comprises a hydraulic control system 1001, the hydraulic control system is connected with a demonstration control system, and the demonstration control system is used for controlling the pressure of the hydraulic control system according to preset pressure.

[0066] In some embodiments, the hydraulic control system is composed of a stepless pressure regulating loop, and can provide stable static hydraulic pressure in the range of 0-10 MPa.

[0067] Figure 3 It is a schematic diagram of the overall structure of the suspension device in some embodiments of the present application. Figure 4 It is a schematic diagram of the test bench in some embodiments of the present application for dry modal characteristic test. Figure 5 It is a schematic diagram of the test bench in some embodiments of the present application for wet modal characteristic test.

[0068] Reference Figure 3 In some embodiments, the suspension device has a suspension beam 102 and a plurality of suspension units 103, the plurality of suspension units are arranged on the suspension beam, each suspension unit comprises a motor 1031, a hanging rope 1032, a binding belt 1033 and a pulley 1034, the pulley, the motor, the hanging rope and the binding belt are connected in sequence, the suspension beam 102 is an I-beam structure, the pulleys are arranged in pairs and have a gap in the middle of the pulleys, and the pulleys are embedded in the I-beam structure of the suspension beam.

[0069] In some embodiments, the hanging rope is detachable and replaceable, and the hanging rope comprises three types, the three types of hanging ropes are divided into "soft" hanging ropes, "moderate" hanging ropes and "hard" hanging ropes according to their inherent frequencies. During test, one or more of the three types of hanging ropes can be configured according to test requirements.

[0070] In some embodiments, a limit block 1035 is provided on the lanyard, and a limit ring 1036 is provided on the motor. The lanyard passes through the limit ring, with one end connected to the motor and the other end connected to a strap. The limit block is provided below the limit ring. By providing the limit block 1035 and the limit ring 1036, the pitch and roll angles of the underwater glider can be limited to prevent accidents caused by excessive angles.

[0071] refer to Figure 4 In some embodiments, when the test bench performs dry modal characteristic testing, the underwater glider 1000 and other equipment can be suspended, and single-point, two-point, or multi-point suspension can be used ( Figure 4 By setting the suspension points, the underwater glider can present different pitch and roll states, and the suspension posture of the equipment can be automatically adjusted as needed.

[0072] refer to Figure 5 Of course, in some embodiments, a table 130 may be provided below the suspension device 100, on which the water tank 300 may be placed. It is understood that the table 130 may not be provided below the suspension device 100, and the water tank may be placed directly on the ground. The motor 1031 may be used to adjust the length of the hanging rope 1032 to immerse the underwater glider in the water tank to test the device's wet modal characteristics.

[0073] refer to Figure 3 In some embodiments, the suspension device has casters 101 for moving the suspension device to a target position. It is understandable that the target position may be a position for conducting dry modal characteristic testing, wet modal characteristic testing, or demonstration and verification. The casters can be used to conveniently move the suspension device, and the suspension device can directly move the suspended underwater glider to the target position or switch between different target positions. The casters also have a locking mechanism 1011 for locking and fixing the suspension device at the target position.

[0074] Figure 6 This is a partial structural diagram of the suspension device in some embodiments of the present application. Figure 7 This is a partial structural diagram of the suspension device in some embodiments of the present application. Figure 8 This is a partial structural diagram of the suspension device in some embodiments of the present application.

[0075] refer to Figure 3 and Figure 6-Figure 8In some embodiments, the suspension device has a support column 104, a connecting beam 105, and a connecting frame 106. There are multiple support columns. In the embodiment of the present application, there are four support columns 104, forming four legs. The four legs form two pairs, and the two pairs of legs are respectively arranged at both ends of the connecting beam 105. The two legs of each pair of legs are connected by a connecting frame 106. The suspension beam 102 is arranged parallel to the connecting beam 105. The suspension beam 102 is arranged between the two pairs of legs. No other supporting structure is arranged between the two pairs of legs. A caster 101 is arranged under each leg. The suspension device of the present application adopts the above-mentioned connection and support structure, which has a simple and stable structure and is suitable for the installation and suspension of underwater gliders.

[0076] In some embodiments, the swing platform 200 is disposed next to the table 130 or the water tank. In some embodiments, the underwater glider can be transferred by moving the suspension device, so that it moves between the table 130 / water tank and the swing platform 200, respectively, to perform underwater glider vibration noise reduction and demonstration verification.

[0077] Specifically, the underwater glider is fixed on a rocking platform, and its rocking posture simulation and depth simulation demonstration verification are carried out. The underwater glider is fixed on the inner platform of the rocking platform. The inner platform can rock longitudinally relative to the outer ring, and the outer ring can rock laterally relative to the base. The rocking control of the rocking platform is realized through the demonstration control system, and the signal feedback of the underwater glider on the lateral and longitudinal tilt angles is received synchronously to form a closed-loop control to simulate the posture of the underwater glider in operation. At the same time, the hydraulic control system controls the pressure according to the preset pressure, so that the pressure source of the underwater glider is at the pressure of the water depth state during operation. The second pressure sensor built into the underwater glider is connected to the pressure-taking pipeline, and the second pressure information in the pressure-taking pipeline is fed back in real time. By comparing the first pressure information and the second pressure information fed back by the first pressure sensor and the second pressure sensor, the water depth demonstration verification is realized.

[0078] Specifically, a first rotation axis 204 is provided between the inner table 201 and the outer ring 202, and a second rotation axis 205 is provided between the base 203 and the outer ring 202. The inner table 201 can swing relative to the outer ring 202 about the first rotation axis 204, while the outer ring 202 can swing relative to the base 203 along the second rotation axis 205. This allows the inner table to swing longitudinally relative to the outer ring, while the outer ring can swing laterally relative to the base. Specifically, the longitudinal and lateral swinging can be driven by hydraulic or motor control.

[0079] In some embodiments, the inner stage 202 is provided with a turntable 206. The underwater glider is fixed to the turntable 206. The turntable 206 can rotate about the inner stage 201 in a third direction. The third direction is perpendicular to the first and second directions, that is, the third direction is perpendicular to the axis of the first rotation axis 204 and the axis of the second rotation axis 205. In some embodiments, the base 203 is a hollow structure, and the outer ring 202 is disposed within the hollow structure of the base 203. The outer ring 202 is a hollow structure, and the inner stage 201 is disposed within the hollow structure of the outer ring 202. A motor is disposed between the turntable 206 and the inner stage 201. The motor is fixedly connected to the inner stage 201, and the output shaft of the motor is connected to the turntable, driving the turntable 206 to rotate about the inner stage 201. By configuring both the base and the outer ring as hollow structures, interference during rotation can be avoided, allowing for large longitudinal and lateral swing angles within a limited height range.

[0080] refer to Figure 8 In some embodiments of the present application, each suspension unit has four pulleys 1034 , two on each side of the I-beam structure of the suspension beam 102 .

[0081] Specifically, the suspension beam 102 is bolted to the connecting frame 106. It comprises an upper top plate 1021, a lower bottom plate 1022, and vertical plates 1023. The vertical plates are connected between the upper and lower bottom plates, forming an I-beam structure. The pulleys are arranged in pairs, each pair comprising a first pulley 10341 and a second pulley 10342, positioned on either side of the vertical plates. The first and second pulleys 10341 and 10342 are connected below by a connecting plate 1037. The motor 1031 is fixedly mounted below the connecting plate 1037.

[0082] In some embodiments, each suspension unit has two pairs of pulleys 1034, which are arranged parallel and adjacent to each other along the longitudinal direction of the suspension beam 102. The two pairs of adjacent pulleys ensure the stability of the suspension. The longitudinal direction of the suspension beam 102 is the length direction of the suspension beam.

[0083] In some embodiments, there are at least three suspension units, spaced longitudinally along the suspension beam 102. Providing at least three suspension units enables single-point, two-point, or multi-point suspension. In some embodiments, the suspension units are movable longitudinally along the suspension beam 102. By configuring the suspension points, the underwater glider can assume different pitch and roll positions, enabling automatic adjustment of the device's suspension posture as needed.

[0084] In the embodiment of the present application, the suspension unit can be used to independently suspend the underwater glider to be tested, or multiple suspension units can work together to suspend the underwater glider to be tested. In some embodiments, the strap 1033 directly contacts the underwater glider, and the strap can be a ring.

[0085] The underwater glider vibration noise reduction and demonstration verification test bench of the present application can realize vibration noise detection and noise reduction debugging functions through the suspension equipment.

[0086] Figure 9 Schematic diagram of a test system in some embodiments of the present application.

[0087] refer to Figure 9 , multiple test points can be set up on the underwater glider, such as Figure 9 Test point 1, test point 2, ..., test point n. Each test point is equipped with a vibration accelerometer to measure vibration acceleration. The vibration accelerometer is connected to a data acquisition and analysis instrument. Multiple force application points can be set up on the underwater glider. An excitation hammer can apply excitation to each force application point. A force sensor is installed on the excitation hammer, which is connected to the data acquisition and analysis instrument to provide feedback on the magnitude of each applied force. The vibration accelerometer can provide feedback on the applied force as vibration acceleration, allowing for vibration noise detection and noise reduction debugging analysis.

[0088] Specifically, equipment such as underwater gliders can be suspended, and single-point, two-point, and multi-point suspension equipment can be used; by setting suspension points, the underwater glider can present different longitudinal and transverse tilt states, and the suspension posture of the equipment can be automatically adjusted as needed.

[0089] The test system is equipped with a data acquisition and analysis instrument, vibration accelerometer, force sensor, hydrophone, excitation hammer, etc. It can perform vibration and noise tests on equipment under various operating conditions such as in air and immersed in water to support vibration and noise reduction analysis.

[0090] The dry modal characteristics test of the equipment can be carried out in various suspension postures of the equipment.

[0091] In various suspension postures of the equipment, a water tank is introduced and the equipment is immersed in water to test the wet modal characteristics of the equipment.

[0092] The underwater glider vibration noise reduction and demonstration verification test bench of the present application is a comprehensive test bench that integrates vibration characteristic testing, noise reduction improvement, and demonstration verification. Through the underwater glider vibration noise reduction and demonstration verification test bench of the present application, the demonstration verification function can also be conveniently realized. Specifically, through the demonstration control system, the swing control of the swing platform is realized, and the signal feedback of the demonstration equipment on the lateral and longitudinal tilt is received synchronously to form a closed-loop control to simulate the posture of the demonstration equipment at work. At the same time, the first pressure sensor of the demonstration equipment is connected to the pressure source, and the pressure source provides pressure in real time to simulate the water depth state when the equipment is working. The second pressure sensor built into the underwater glider is connected to the pressure taking pipeline, and the second pressure information in the pressure taking pipeline is fed back in real time. By comparing the first pressure information and the second pressure information fed back by the first pressure sensor and the second pressure sensor, the demonstration and verification of the water depth is realized.

[0093] Furthermore, the underwater glider vibration noise reduction and demonstration verification test bench of this application can timely improve relevant parameters, and testing can be carried out immediately after the improvement. Moreover, during the demonstration and verification, experimental vibration characteristic testing can also be carried out, which can achieve demonstration during testing and testing during demonstration.

[0094] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An underwater glider vibration noise reduction and demonstration verification test bench, characterized in that: The test bench includes: a suspension device, a rocking platform, a water tank, a data acquisition and analysis instrument, a vibration acceleration sensor, a force sensor, a hydrophone, a sound level meter, and an excitation hammer; The suspension device is used to suspend the underwater glider, and the vibration acceleration sensor is connected to the underwater glider. The hydrophone is disposed in the water tank, and the water tank is used to immerse the underwater glider in water to test the wet modal characteristics of the underwater glider; The data acquisition and analysis instrument is connected to the vibration acceleration sensor, force sensor, hydrophone, and sound level meter; The excitation hammer is used to apply a preset excitation force to the underwater glider, and the force sensor is connected to the excitation hammer; The underwater glider vibration and noise reduction and demonstration and verification test bench is used to perform vibration and noise testing and vibration and noise reduction analysis on the underwater glider in a suspended state, in air and submerged in water, under various operating conditions; The swing platform is used to fix the underwater glider and simulate and demonstrate the swing posture and depth of the underwater glider; The underwater glider vibration noise reduction and demonstration and verification test bench is a comprehensive test bench that integrates vibration characteristic testing, noise reduction improvement, and demonstration and verification.

2. The underwater glider vibration noise reduction and demonstration verification test bench according to claim 1 is characterized in that: The swing platform includes an inner platform, an outer ring and a base. The inner platform is provided with a turntable. The underwater glider is fixed on the turntable. The inner platform can swing relative to the outer ring in a first direction, and the outer ring can swing relative to the base in a second direction. The turntable can rotate around the inner platform in a third direction, and the third direction is perpendicular to the first direction and the second direction.

3. The underwater glider vibration noise reduction and demonstration test bench according to claim 2 is characterized in that: The underwater glider vibration noise reduction and demonstration verification test bench also includes a posture sensor, which is used to feedback the swing posture of the inner platform and the outer ring of the swing platform.

4. The underwater glider vibration noise reduction and demonstration verification test bench according to claim 3 is characterized in that: The underwater glider vibration noise reduction and demonstration verification test bench also includes a demonstration control system, which is connected to the attitude sensor and is used to perform closed-loop control according to the rocking attitude of the inner platform and outer ring of the rocking platform and the preset working attitude; The posture sensor includes a first inclination sensor, a second inclination sensor, and a rotation encoder; The first tilt sensor is used to detect the angle of sway along the first direction, the second tilt sensor is used to detect the angle of sway along the second direction, and the rotary encoder is used to detect the angle of rotation about the third direction. The underwater glider is equipped with a built-in tilt sensor to feedback the roll angle and pitch angle of the underwater glider itself; The underwater glider vibration noise reduction and demonstration and verification test bench also includes a demonstration and verification module, which is used to compare the roll angle and pitch angle of the underwater glider itself with the angle of swing along the first direction detected by the first tilt sensor and the angle of swing along the second direction detected by the second tilt sensor to obtain a demonstration and verification result.

5. The underwater glider vibration noise reduction and demonstration test bench according to claim 4 is characterized in that: The underwater glider vibration noise reduction and demonstration and verification test bench also includes a pressure source and an interface tooling. The pressure source has a built-in first pressure sensor and is connected to the interface tooling. The interface tooling is connected to the pressure-taking pipeline of the underwater glider and is used to provide real-time pressure to simulate the water depth state of the underwater glider when it is working. The pressure source can provide stable static pressure through closed-loop control, and the first pressure information provided by the built-in first pressure sensor of the pressure source is fed back in real time; The pressure-taking pipeline of the underwater glider is also connected to the second pressure sensor built into the underwater glider, which feeds back the second pressure information in the pressure-taking pipeline in real time. By comparing the first pressure information and the second pressure information fed back by the first pressure sensor and the second pressure sensor, the water depth demonstration and verification is achieved.

6. The underwater glider vibration noise reduction and demonstration verification test bench according to claim 5, characterized in that: The pressure source includes a hydraulic regulating system, which is connected to the demonstration control system. The demonstration control system is used to control the hydraulic regulating system to control the pressure according to a preset pressure.

7. The underwater glider vibration noise reduction and demonstration test bench according to claim 6, characterized in that: The hydraulic control system consists of a stepless pressure regulation circuit and can provide a stable static hydraulic pressure within the range of 0-10MPa.

8. The underwater glider vibration noise reduction and demonstration test bench according to claim 7, characterized in that: The suspension device has casters for moving the suspension device to a target position; The caster also has a locking mechanism for locking and fixing the suspension device at a target position.

9. The underwater glider vibration noise reduction and demonstration test bench according to claim 8, characterized in that: The suspension device comprises a suspension beam and a plurality of suspension units, wherein the plurality of suspension units are arranged on the suspension beam, each suspension unit comprises a motor, a hanging rope, a binding belt, and a pulley, wherein the pulley, the motor, the hanging rope, and the binding belt are connected in sequence, the suspension beam is an I-beam structure, the pulleys are arranged in pairs, a gap is formed between the pair of pulleys, and the pair of pulleys are embedded in the I-beam structure of the suspension beam; The suspension units can be configured to independently suspend the underwater glider to be tested, or multiple suspension units can work together to suspend the underwater glider to be tested, depending on the test requirements.

10. The underwater glider vibration noise reduction and demonstration test bench according to claim 9, characterized in that: A limit block is provided on the lanyard, a limit ring is provided on the motor, the lanyard passes through the limit ring, one end of the lanyard is connected to the motor, and the other end is connected to the strap, and the limit block is provided below the limit ring; The lanyard is detachable and replaceable. There are three types of lanyards, which are classified into "soft", "moderate" and "hard" types according to their natural frequencies. During testing, one or more of the three types can be configured according to test requirements.

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