Underwater glider vibration noise reduction and demonstration verification test bed

Abstract

The invention discloses a vibration noise reduction and demonstration verification test bed for an underwater glider. The test bed comprises suspension equipment, a swing table, a water tank, a data acquisition analyzer, a vibration acceleration sensor, a force sensor, a hydrophone, an exciting force hammer and a sound level meter, the hydrophone is arranged in the water tank, and the water tank is used for enabling the underwater glider to be immersed in water and testing the wet mode 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 exciting force hammer is used for applying preset exciting force to the underwater glider; the underwater glider vibration noise reduction and demonstration verification test bench is used for carrying out vibration noise testing and vibration reduction and noise reduction analysis on an underwater glider in a suspended state under the conditions that the underwater glider is in air and immersed in water and under various operation conditions; the swing table is used for fixing the underwater glider and carrying out swing posture simulation and depth simulation demonstration verification on the underwater glider.

Description

Technical Field

[0001] The 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 more sophisticated, faster and lighter, and vibration and noise problems have become an important topic that needs to be studied and solved in the field of engineering technology. Due to the use of computers and the emergence of advanced vibration measurement and analysis technology, the research and application of vibration theory and noise control technology have made many important developments, forming a relatively complete theoretical system in fault signal processing, mechanical fault diagnosis, vibration noise, bearing dynamics, planetary gear dynamics, etc., and has achieved a large number of fruitful engineering applications in machinery, ships, rail transportation, aviation and other industries. However, the existing test equipment has a single function and poor environmental adaptability, and cannot meet the diverse working conditions and environmental testing needs. And it is impossible to simultaneously realize the demonstration and verification function of actual working conditions. Summary of the invention

[0003] In view of the above 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 realize vibration noise detection and noise reduction debugging functions in dry and wet states simultaneously through suspension equipment, water tanks, swing platforms, etc., and can also conveniently realize water depth simulation and demonstration and verification functions.

[0004] To achieve the above purpose, the present invention adopts the following technical solution.

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

[0006] Suspension equipment, swing table, water tank, data acquisition analyzer, vibration acceleration sensor, 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 arranged in the water tank, and the water tank is used to immerse the underwater glider into water to test the wet modal characteristics of the underwater glider;

[0009] The data acquisition analyzer 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 noise reduction and demonstration verification test bench is used to perform vibration noise testing and vibration noise reduction analysis on the underwater glider in a suspended state, in the air and under submerged conditions, 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 integrating 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 also includes a posture sensor, and the posture sensor is used to feedback the rocking posture of the inner platform and the 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 swing attitude of the inner platform and outer ring of the swing platform and the preset working attitude;

[0017] The attitude sensor includes a first inclination sensor, a second inclination sensor, and a rotation 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 rotation encoder is used to detect the angle of rotation around the third direction. The underwater glider is built with an inclination 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 swaying along the first direction detected by the first inclination sensor and the angle of swaying along the second direction detected by the second inclination 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, wherein the pressure source has a built-in first pressure sensor and is connected to the interface tooling, and the interface tooling is connected to the pressure-taking pipeline of the underwater glider to provide pressure in real time to simulate the water depth state of the underwater glider when working;

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

[0021] The pressure-taking pipeline of the underwater glider is also connected to the second pressure sensor built into the underwater glider, 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 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 has a suspension beam and a plurality of suspension units, 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, 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 provided in the middle of a pair of pulleys, and the pair of pulleys are embedded in the I-beam structure of the suspension beam;

[0027] The suspension unit 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 of the hanging rope 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. The lanyard includes three types. The three types of lanyards 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 with the prior art, the beneficial effects of the present invention are as follows: the underwater glider vibration noise reduction and demonstration and verification test bench of the present application can realize the vibration noise detection and noise reduction debugging functions through the suspension equipment, and the demonstration and verification function can also be conveniently realized through the swing platform. In some embodiments, the underwater glider and other equipment can be suspended, and single-point, two-point, and multi-point suspension equipment can be used; by setting the 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. In some embodiments of the present application, a test system composed of a data acquisition analyzer, a vibration acceleration sensor, a force sensor, a hydrophone, an excitation hammer, etc. is equipped, and the equipment can be tested for vibration and noise in various operating conditions under conditions such as in the air and immersed in water to support vibration reduction and noise reduction analysis. In some embodiments, the dry modal characteristics of the equipment can be tested under various suspension postures of the equipment. In some embodiments, a water tank is introduced under various suspension postures of the equipment, and the equipment is immersed in water, and the wet modal characteristics of the equipment can be tested.

[0031] In addition, the underwater glider vibration noise reduction and demonstration verification test bench of the present application can also conveniently realize the demonstration verification function. 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 synchronously received to form a closed-loop control to simulate the posture of the demonstration equipment at work. At the same time, the pressure sensor of the demonstration equipment is connected to the pressure source to feedback the pressure in real time to simulate the water depth state when the equipment is working;

[0032] Moreover, through the underwater glider vibration noise reduction and demonstration verification test bench of the present application, relevant parameters can be improved in time, and testing can be carried out immediately after the improvement. Moreover, during the demonstration verification, experimental vibration characteristic testing can also be carried out, which can realize 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 an 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 of 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 schematic diagram of the suspension device in some embodiments of the present application.

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

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

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

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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", "back", "left", "right", "vertical", "horizontal", "lateral", "longitudinal", "top", "bottom", "inner", "outer", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. The interpretation of such terms should be conducted from the perspective of those skilled in the art.

[0044] In the present invention, unless otherwise clearly defined and specified, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense from the perspective of those skilled in the art. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the 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, an underwater glider vibration noise reduction and demonstration and verification test bench is provided, comprising: a suspension device 100, a swing platform 200, a water tank 300, a data acquisition analyzer 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 arranged in the water tank, and the water tank is used to immerse the underwater glider into water to test the wet modal characteristics of the underwater glider;

[0050] The data acquisition analyzer 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 noise reduction and demonstration verification test bench is used to perform vibration noise testing and vibration noise reduction analysis on the underwater glider in a suspended state, in the air and under submerged conditions, 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 integrating 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 swing 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 on the turntable 201. The inner platform 201 can swing relative to the outer ring 202 along a first direction, and the first direction can be the longitudinal direction of the underwater glider. The outer ring 202 can swing relative to the base 203 along a second direction, and the second direction can be the lateral direction of the underwater glider. 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.

[0058] In some embodiments, the underwater glider vibration noise reduction and demonstration and verification test bench further includes a posture sensor 900, and the posture sensor 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 and 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 according to the rocking attitude of the inner platform and outer ring of the rocking platform and a 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 a first direction, the second inclination sensor is used to detect the angle of swing along a 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 swaying along the first direction detected by the first inclination sensor and the angle of swaying along the second direction detected by the second inclination sensor, respectively, to obtain a demonstration and verification result.

[0062] In some embodiments, the underwater glider vibration noise reduction and demonstration and verification test bench further includes a pressure source 160 and an interface tooling, wherein the pressure source has a built-in first pressure sensor 120 and is connected to the interface tooling, and the interface tooling is connected to the pressure-taking pipeline of the underwater glider to provide pressure in real time to simulate the water depth state of the underwater glider when working;

[0063] The pressure source can provide a stable static pressure through closed-loop control, and the first pressure information provided can be fed back in real time through a first pressure sensor built into the pressure source;

[0064] The pressure-taking pipeline of the underwater glider is also connected to the second pressure sensor 180 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 demonstration and verification of the water depth is achieved.

[0065] In some embodiments, the pressure source includes a hydraulic regulation system 1001, and 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.

[0066] 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.

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

[0068] refer to Figure 3 In some embodiments, the suspension device has a suspension beam 102 and multiple suspension units 103, and the multiple suspension units are arranged on the suspension beam. Each suspension unit includes a motor 1031, a hanging rope 1032, a strap 1033, and a pulley 1034. The pulley, motor, hanging rope, and strap are connected in sequence. The suspension beam 102 is an I-beam structure, and the pulleys are arranged in pairs. There is a gap in the middle of a pair of pulleys, and the pair of pulleys are embedded in the I-beam structure of the suspension beam.

[0069] In some embodiments, the lanyard is detachable and replaceable, and the lanyard includes three types, which are divided into "soft" lanyard, "moderate" lanyard, and "hard" lanyard according to their own natural frequencies. During testing, one or more of the three types can be configured according to test requirements.

[0070] In some embodiments, it is characterized in that a limit block 1035 is provided on the hanging rope, a limit ring 1036 is provided on the motor, the hanging rope passes through the limit ring, one end of the hanging rope is connected to the motor, and the other end is connected to the strap, and the limit block is provided below the limit ring. By providing the limit block 1035 and the limit ring 1036, the pitching and swinging 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 The suspension point is set to allow the underwater glider to present different longitudinal and transverse tilt 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, and a water tank 300 may be placed on the table 130. It is understandable that no table may be provided below the suspension device 100, and the water tank may be placed directly on the ground, and the length of the hanging rope 1032 may be adjusted by the motor 1031 to immerse the underwater glider into the water of the water tank, so as to test the wet modal characteristics of the device.

[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 performing dry modal characteristic test, wet modal characteristic test or demonstration verification. The suspension device can be conveniently moved by the casters, 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 schematic diagram of the suspension device in some embodiments of the present application. Figure 7 This is a partial structural schematic diagram of the suspension device in some embodiments of the present application. Figure 8 This is a partial structural schematic 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, and 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, and the structure is simple and stable, which 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 to perform vibration noise reduction and demonstration verification of the underwater glider, respectively.

[0077] Specifically, the underwater glider is fixed on a swing platform, and a simulation of the swing posture and the depth simulation demonstration verification are performed. The underwater glider is fixed on the inner platform of the swing platform. The inner platform can swing longitudinally relative to the outer ring, and the outer ring can swing laterally relative to the base. The swing control of the swing platform is realized through the demonstration control system, and the signal feedback of the lateral and longitudinal inclination angles of the underwater glider is received synchronously to form a closed-loop control to simulate the posture of the underwater glider at work. At the same time, the hydraulic control system controls the pressure according to the preset pressure control, so that the pressure source of the underwater glider is at the pressure of the water depth state during operation. The built-in second pressure sensor of 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. The demonstration verification of the water depth 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.

[0078] Specifically, a first rotating shaft 204 is provided between the inner stage 201 and the outer ring 202, and a second rotating shaft 205 is provided between the base 203 and the outer ring 202. The inner stage 201 can swing relative to the outer ring 202 around the first rotating shaft 204, and the outer ring 202 can swing relative to the base 203 along the second rotating shaft 205. Thus, the inner stage can swing longitudinally relative to the outer ring, and the outer ring can swing transversely relative to the base. Specifically, the longitudinal swing and transverse swing can be driven by hydraulic or motor control.

[0079] In some embodiments, the inner stage 202 has a turntable 206. The underwater glider is fixed on the turntable 206. The turntable 206 can rotate around the inner stage 201 in a third direction. The third direction is perpendicular to the first direction and the second direction, that is, the third direction is perpendicular to the axis direction of the first rotating shaft 204 and the axis direction of the second rotating shaft 205. In some embodiments, the base 203 is a hollow structure, and the outer ring 202 is arranged in the hollow structure of the base 203. The outer ring 202 is a hollow structure, and the inner stage 201 is arranged in the hollow structure of the outer ring 202. There is a motor between the turntable 206 and the inner stage 201, and the motor is fixedly connected to the inner stage 201. The output shaft of the motor is connected to the turntable to drive the turntable 206 to rotate around the inner stage 201. By setting the base and the outer ring as hollow structures, interference can be avoided during the rotation process, so that a larger longitudinal swing and lateral swing angle can be achieved 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 fixed to the connecting frame 106 by bolts. The suspension beam 102 has an upper top plate 1021, a lower bottom plate 1022 and a vertical plate 1023. The vertical plate is connected between the upper top plate and the lower bottom plate to form an I-beam structure. The pulleys are arranged in pairs, and each pair of pulleys includes a first wheel 10341 and a second wheel 10342 arranged on both sides of the vertical plate. The first wheel 10341 and the second wheel 10342 are connected below by a connecting plate 1037. The motor 1031 is fixedly arranged 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 in the longitudinal direction of the suspension beam 102. The two pairs of pulleys arranged adjacent to each other 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, which are arranged at intervals along the longitudinal direction of the suspension beam 102. By setting at least three suspension units, single-point, two-point, and multi-point suspension can be achieved. In some embodiments, the suspension unit can move along the longitudinal direction of the suspension beam 102, and by setting the suspension points, the underwater glider can present different longitudinal and transverse tilt states, so as to achieve automatic adjustment of the equipment 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 is in direct contact with the underwater glider, and the strap can be a hanging 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] Fig. 9 Schematic diagram of a test system in some embodiments of the present application.

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

[0088] Specifically, equipment such as underwater gliders can be suspended, and single-point, two-point, or multi-point suspension equipment can be used; by setting suspension points, the underwater glider can present different longitudinal and lateral 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 analyzer, vibration accelerometer, force sensor, hydrophone, excitation hammer, etc. It can perform vibration and noise tests on the equipment in various operating conditions such as in the 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 to immerse the equipment 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 synchronously received 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 built-in second pressure sensor of 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] Moreover, through the underwater glider vibration noise reduction and demonstration verification test bench of the present application, relevant parameters can be improved in time, and testing can be carried out immediately after the improvement. Moreover, during the demonstration verification, experimental vibration characteristic testing can also be carried out, which can realize demonstration during testing and testing during demonstration.

[0094] It will be easily understood by those skilled in the art that the above description is only 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 protection scope of the present invention.

Claims

1. An underwater glider vibration noise reduction and demonstration test bench, characterized in that: The test bench includes: a suspension device, a swing table, a water tank, a data acquisition analyzer, 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 arranged 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 analyzer 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 noise reduction and demonstration verification test bench is used to perform vibration noise testing and vibration noise reduction analysis on the underwater glider in a suspended state, in the air and under submerged conditions, 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 integrating vibration characteristic testing, noise reduction improvement, and demonstration and verification.

2. The underwater glider vibration noise reduction and demonstration test bench according to claim 1 is characterized in that: The swing platform comprises 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 along a first direction, and the outer ring can swing relative to the base along 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 and 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 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 swing attitude of the inner platform and outer ring of the swing platform and the preset working attitude; The posture sensor includes a first inclination sensor, a second inclination sensor, and a rotation 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, the rotary encoder is used to detect the angle of rotation around the third direction, and the underwater glider is built with an inclination sensor for feeding back 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 swing angle along the first direction detected by the first inclination sensor and the swing angle along the second direction detected by the second inclination sensor to obtain a demonstration and verification result.

5. The underwater glider vibration noise reduction and demonstration and verification 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 is equipped with a 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. The pressure source can provide a stable static pressure through closed-loop control, and the first pressure information provided can be fed back in real time through a first pressure sensor built into the pressure source; The pressure-taking pipeline of the underwater glider is also connected to the second pressure sensor built into the underwater glider, 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 achieved.

6. The underwater glider vibration noise reduction and demonstration test bench according to claim 5, characterized in that: The pressure source includes a hydraulic regulating system, the hydraulic regulating system is connected to the demonstration control system, and 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 regulating circuit and can provide a stable static hydraulic pressure in 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 provided between a pair of pulleys, and the pair of pulleys are embedded in the I-beam structure of the suspension beam; The suspension unit 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 arranged on the hanging rope, a limit ring is arranged on the motor, the hanging rope passes through the limit ring, one end of the hanging rope is connected to the motor, and the other end is connected to the binding belt, and the limit block is arranged below the limit ring; The lanyard is detachable and replaceable. The lanyard includes three types. The three types of lanyards 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.

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