CN109356959B - Self-adaptive remote active vibration reduction system - Google Patents

Self-adaptive remote active vibration reduction system Download PDF

Info

Publication number
CN109356959B
CN109356959B CN201811230814.9A CN201811230814A CN109356959B CN 109356959 B CN109356959 B CN 109356959B CN 201811230814 A CN201811230814 A CN 201811230814A CN 109356959 B CN109356959 B CN 109356959B
Authority
CN
China
Prior art keywords
vibration
controller
air spring
remote
transmission channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811230814.9A
Other languages
Chinese (zh)
Other versions
CN109356959A (en
Inventor
姜伟
陈学东
程依依
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huazhong University of Science and Technology
Original Assignee
Huazhong University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huazhong University of Science and Technology filed Critical Huazhong University of Science and Technology
Priority to CN201811230814.9A priority Critical patent/CN109356959B/en
Publication of CN109356959A publication Critical patent/CN109356959A/en
Application granted granted Critical
Publication of CN109356959B publication Critical patent/CN109356959B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/066—Units characterised by the partition, baffle or like element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3264—Arrangements for indicating, e.g. fluid level; Arrangements for checking dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The invention belongs to the technical field of ultra-precision vibration reduction and discloses a self-adaptive remote active vibration reduction system. The damping device at least comprises a main supporting device, a remote damping device, a liquid transmission pipeline (4) and a controller (9), wherein the liquid transmission channel (4) is connected with the controller (9) in parallel, two ends of the liquid transmission channel and the controller are respectively connected with the main supporting device and the remote damping device to form a closed loop structure, the remote damping device is a closed container provided with a charging and discharging interface, compressed gas and viscous liquid (6) are filled in the closed container, and a throttle valve or a damper (5) is arranged on the liquid transmission pipeline (4). The vibration isolation device can realize vibration isolation in a narrow space, can self-adaptively adjust the air inflow of the air spring and the flow of the flow limiting device according to the vibration isolation object in real time, realizes secondary active vibration isolation on the vibration isolation object, and has the characteristics of high vibration isolation precision, small required installation space, flexible size, strong environmental adaptability and the like.

Description

Self-adaptive remote active vibration reduction system
Technical Field
The invention belongs to the technical field of ultra-precision vibration reduction, and particularly relates to a self-adaptive remote active vibration reduction system.
Background
Vibration is ubiquitous in facilities/equipment in almost all areas of human production and life, such as vehicles, ships, aircraft, spacecraft, manufacturing equipment, measuring instruments, various engineering work equipment, and structural facilities such as buildings, bridges, and the like. In most cases, the presence of vibrations significantly increases the dynamic stresses and deformations of the structure, with a certain amount of noise, which leads to a deterioration of the performance of the equipment or equipment, such as the service precision, or to an environmental degradation, and in the severe case even to a structural failure, with unfortunate consequences. The elimination of mechanical vibrations thus has a significant impact on the performance of the mechanical equipment, and various methods are required to isolate the transmission of vibrations or eliminate them. With the extreme development of the operating environment and service performance of various manufacturing equipment and measuring instruments, the power consumption, the size space, the operating environment and other aspects of mobile equipment are greatly limited, and correspondingly, strict requirements on the size, the weight, the environmental adaptability and the like of a vibration damping system are also provided.
The vibration suppression problem of the mobile equipment under the complex disturbance has a pair of main contradictions, namely, the vibration suppression problem has strong vibration isolation capability and large bearing capability. The air spring realizes the vibration isolation function through air compression and has low rigidity and large load capacity. Bag type air springs have long been used in the automotive field, while membrane type air springs are often used in the precision manufacturing field. The air spring can be divided into a single chamber and a double chamber according to the number of air chambers. Only a single chamber air spring of relatively simple construction will be discussed herein. As shown in figure 1, the single-chamber air spring consists of a metal shell, a piston mechanism and a sealing film, wherein the piston is connected with the shell in a sealing mode through the sealing film and mainly provides vertical rigidity. The vertical stiffness k is related to the load f borne by the air spring, the cross-sectional area A of the piston of the air spring and the initial volume V0 of the chamber, wherein k is 1.4 which is an adiabatic index, and the specific expression is as follows:
Figure BDA0001837113850000021
the rigidity of the air spring is greatly influenced by the key feature size of the structure, the change of the key feature size is limited in a narrow space, and the vibration isolation characteristic and the bearing capacity of the elastic element are difficult to adjust according to requirements. And for a conventional vibration damping system, the vibration damping rigidity is generally a fixed value, the natural frequency of the vibration damping system does not change along with the change of the vibration amplitude, and once the external vibration excitation frequency is close to or consistent with the natural frequency of the vibration damping system, resonance is easily caused.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides a self-adaptive remote active vibration damping system, which is characterized in that aiming at a narrow space which is inconvenient for installing a large vibration damping system, the action mechanism of a communicating unit filled with viscous liquid is tightly combined with a remote vibration damping unit applying reaction force and a corresponding control unit, the specific structure, the layout, the control driving mode and other aspects of a plurality of key components of the whole vibration damping system are improved, the reaction force and the current limitation can be correspondingly applied to the communicating unit serving as remote vibration damping according to the vibration condition of a vibration-isolated object, the rigidity and the damping of the vibration damping system are changed by adjusting the volume of air in an air spring, the external vibration excitation frequency can be avoided, the resonance phenomenon is avoided, and the vibration of the vibration-isolated object is accurately and effectively reduced or even eliminated in real time in a secondary vibration damping mode, compared with the existing equipment, the damping device has the characteristics of flexible installation, detachability, strong bearing capacity, variable damping and rigidity, and adaptive remote active vibration reduction.
In order to achieve the above object, the present invention provides an adaptive remote active damping system, which is characterized by comprising a main supporting device, a liquid transmission pipeline, a controller and a remote damping device, wherein two ends of the liquid transmission pipeline and the controller are respectively connected with the main supporting device and the remote damping device to form a closed loop structure; wherein the content of the first and second substances,
the main supporting device is of a hydraulic cylinder structure and comprises a piston and a cylinder barrel, one end of the piston is connected with an object to be subjected to vibration isolation, the other end of the piston can move along the cylinder barrel under the action of the object to be subjected to vibration isolation, and the bottom of the cylinder barrel is provided with a first opening communicated with the liquid transmission pipeline;
the remote vibration damper is a sealed container, a horizontally movable baffle is arranged in the middle of the sealed container, and the sealed container is divided into an upper sealed part and a lower sealed part by the baffle; and the number of the first and second electrodes,
the lower part of the sealed container is provided with a second opening communicated with the hydraulic transmission pipeline, and the cylinder barrel, the hydraulic transmission pipeline and the lower part of the sealed container are filled with viscous liquid which can flow in the cylinder barrel, the hydraulic transmission pipeline and the lower part of the sealed container through the first opening and the second opening; the upper part of the sealed container is provided with an air spring, the control end of the air spring is connected with the controller, and the air spring is used for sending a working instruction to the air spring by the controller according to the vibration characteristic of the vibration-isolated object, further changing the pressure of the air spring according to the instruction, further applying the pressure which is equivalent to the pressure generated by the vibration-isolated object but opposite to the pressure generated by the vibration-isolated object to the viscous liquid, and limiting the flow of the viscous liquid so as to realize real-time effective remote vibration isolation of the vibration-isolated object.
Further, the air spring comprises a metal shell, the metal shell is sealed to form an air cavity, an air spring piston is arranged at the bottom of the air cavity, a membrane is arranged between the air spring piston and the air cavity, and strict sealing between the air spring piston and the metal shell is achieved through the membrane structure.
Furthermore, an air inlet valve and a driver are arranged on one side of the air spring, the controller is in communication connection with the main supporting device through one end of a lead, the other end of the lead is in communication connection with the driver, and the driver is used for receiving instructions of the controller and driving the air inlet valve to act to realize gas filling.
Furthermore, a current limiting device is arranged on the liquid transmission pipeline, a control end of the current limiting device is connected with the controller, and the controller is used for controlling the opening degree of the current limiting device according to the vibration characteristics of the vibration-isolated object so as to limit the flow of the viscous liquid, thereby realizing real-time effective secondary remote vibration isolation of the vibration-isolated object.
Further, the flow restricting device is a throttle or a damper.
Further, the height of the central position of the first opening and the second opening is at least 5mm lower than the liquid level height of the viscous liquid.
Further, a circle of circular opening reeds are arranged on the outer side of the liquid conveying pipeline along the circumferential direction, and the opening reeds are used for changing the diameter of the liquid conveying pipeline through bolt adjustment so as to change the damping of the liquid conveying pipeline.
Furthermore, a sensor is arranged on the vibration isolation object and connected with the controller.
Further, the sensor is an acceleration sensor or a force sensor, and is used for measuring the vibration characteristics of the vibration-isolated object in real time and transmitting the signals of the vibration characteristics to the controller.
Further, the controller applies an LMS vibration test system to the signalProcessing to obtain vibration transfer function and acceleration impedance z of the vibration-isolated objectaOr admittance HaA curve is obtained, so that the rigidity k and the damping c required by vibration reduction are obtained;
Figure BDA0001837113850000041
Figure BDA0001837113850000042
Figure BDA0001837113850000043
where ω represents frequency, m represents mass, and j represents a complex term.
Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. aiming at the narrow space where a large-scale vibration-damping system is inconvenient to install, the invention closely combines the action mechanism of the communicating unit filled with viscous liquid with the remote vibration-damping unit applying the reaction force and the corresponding control unit, improves the specific structures, the layout, the control driving mode and other aspects of a plurality of key components of the whole vibration-damping system, correspondingly can apply the reaction force and the current limitation to the communicating unit serving as the remote vibration-damping according to the vibration condition of the vibration-damped object, changes the rigidity and the damping of the vibration-damping system by adjusting the volume of the gas in the air spring, can avoid the external vibration-exciting frequency so as to avoid the resonance phenomenon, and accurately and effectively reduces or even eliminates the vibration of the vibration-damped object in real time in a secondary vibration-damping mode The variable damping and rigidity self-adaptive remote active vibration reduction characteristic.
2. The invention monitors the pressure of the vibration-isolated object to the liquid in real time through the arranged pressure sensor, transmits the pressure signal to the controller so as to control the air inflow of the air spring, realizes primary vibration isolation of the vibration-isolated object, directly limits the flow of the fluid passing through by adjusting and controlling the size of the opening of the flow limiting device, plays a role in adjusting the damping, can realize secondary accurate vibration isolation of the vibration-isolated object according to the requirement and provides higher vibration isolation performance.
Drawings
Fig. 1 is a schematic structural diagram of an adaptive remote active damping system according to an embodiment of the present invention;
FIG. 2 is a simplified structural diagram of a damping device according to an embodiment of the present invention;
figure 3 is a schematic view of a prior art single chamber air spring.
Throughout the drawings, like reference numerals designate like structural elements, and wherein: 1-vibration-isolated object, 2-piston, 3-cylinder, 4-liquid transmission channel, 5-flow-limiting device, 6-viscous liquid, 7-air spring, 701-metal shell, 702-air spring piston, 703-membrane body, 704-air chamber, 705-air inlet valve, 706-driver, 8-sensor and 9-controller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The invention provides a self-adaptive remote active vibration damping system which comprises a main supporting device, a liquid transmission pipeline, a controller and a remote vibration damping device, wherein two ends of the liquid transmission pipeline and the controller are respectively connected with the main supporting device and the remote vibration damping device to form a closed loop structure; the main supporting device is of a hydraulic cylinder structure and comprises a piston and a cylinder barrel, one end of the piston is connected with an object to be subjected to vibration isolation, the other end of the piston can move along the cylinder barrel under the action of the object to be subjected to vibration isolation, and the bottom of the cylinder barrel is provided with a first opening communicated with the liquid transmission pipeline; the remote vibration damping device is a sealed container, a horizontally movable baffle is arranged in the middle of the sealed container, the sealed container is divided into an upper sealed part and a lower sealed part by the baffle, wherein the lower part of the sealed container is provided with a second opening hole communicated with the hydraulic transmission pipeline, the cylinder barrel, the hydraulic transmission pipeline and the lower part of the sealed container are filled with viscous liquid, and the viscous liquid can flow in the cylinder barrel, the hydraulic transmission pipeline and the lower part of the sealed container through the first opening hole and the second opening hole; the upper part of the sealed container is provided with an air spring, the control end of the air spring is connected with the controller, and the air spring is used for sending a working instruction to the air spring by the controller according to the vibration characteristic of the vibration-isolated object, further changing the pressure of the air spring according to the instruction, further applying the pressure which is equivalent to the pressure generated by the vibration-isolated object but opposite to the pressure generated by the vibration-isolated object to the viscous liquid, and limiting the flow of the viscous liquid so as to realize real-time effective remote vibration isolation of the vibration-isolated object.
The liquid transmission pipeline is provided with a flow limiting device, the control end of the flow limiting device is connected with the controller, and the controller is used for controlling the opening of the flow limiting device according to the vibration characteristics of the vibration-isolated object so as to limit the flow of the viscous liquid, thereby realizing real-time effective secondary remote vibration isolation of the vibration-isolated object. Specifically, the method comprises the following steps:
fig. 1 is a schematic structural diagram of an adaptive remote active damping system according to an embodiment of the present invention, and as shown in the drawing, the adaptive remote active damping system according to the present invention includes three parts, namely a main support device, a liquid transmission pipeline, and a remote damping device. The main support device comprises a piston 2, a cylinder 3 and a first opening, the remote vibration damper is a closed container, the lower half portion of the remote vibration damper is filled with viscous liquid 6 and provided with a second opening, and the upper half portion of the remote vibration damper is provided with an air spring 7 filled with air. The vibration-isolated object 1 is fixedly connected with a piston 2 in a main supporting device, and a cylinder barrel 3, a liquid transmission pipeline 4 and the lower half part of a closed container are filled with viscous liquid 6. When the distance between the vibration isolation object 1 and the foundation is reduced, the piston 2 and the cylinder 3 generate relative displacement, and then the viscous liquid is compressed, the pressure in the viscous liquid is increased, and the viscous liquid flows out of the main supporting device and flows into the remote vibration damping device through the liquid transmission pipeline 4. Meanwhile, the height of the central position of the first opening and the second opening is at least 5mm lower than the liquid level height of the viscous liquid. The pressure intensity of the viscous liquid 6 is larger than the pressure intensity of air in the air spring, the baffle is extruded, and the equivalent rigidity and the damping generated by the pressure difference inhibit the change of the volume of the viscous liquid. Liquid is squeezed into the main support device based on the incompressible property of the liquid, and downward movement of the piston and thus downward movement of the vibration-isolated object is inhibited. Similarly, when the distance between the object to be vibration-isolated and the base is increased, the vibration is suppressed based on the same principle.
A flow restriction device 5 is arranged on the liquid transmission pipeline 4, and a simplified damping device is shown in a schematic structural diagram in fig. 2, wherein the flow restriction device is a throttle valve or a damper. A circle of circular opening reeds are surrounded outside the liquid transmission pipeline 4, the diameter of the liquid transmission pipeline is changed by screwing bolts, damping holes are formed, and therefore the damping of the device is changed. The throttle valve can also be used for limiting the flow of the viscous liquid by adjusting and controlling the size of the opening in the valve, so as to inhibit the up-and-down vibration of the piston 2 in the main support device and play a role in adjusting the damping. The vibration isolation object 1 is also provided with a sensor 8, the vibration characteristics of the vibration isolation object are measured when the vibration isolation object vibrates, the measurement signal is transmitted to the air spring, the air inflow of the air spring is dynamically adjusted, and further the rigidity and the damping of the air spring are changed. Under the conventional condition of small amplitude, the air spring has low rigidity and good vibration isolation effect. Once the external excitation frequency is close to the natural frequency of the vibration damping system in the conventional small-amplitude vibration state, and the vibration amplitude is increased, the rigidity and the damping of the vibration damping system are changed by adjusting the volume of the gas in the air spring, so that the external excitation frequency is avoided, the resonance phenomenon is avoided, and the vibration damping effect in a specific frequency band is optimal.
Fig. 3 is a schematic diagram of an air spring structure according to an embodiment of the present invention, which includes a metal housing 701, an air spring piston 702, a membrane 703, an air cavity 704, an air inlet valve 705, and an actuator 706. The metal shell 701 is sealed to form an air cavity 704, an air spring piston 702 is arranged at the bottom of the air cavity 704, a membrane body 703 is arranged between the air spring piston 702 and the air cavity 704, and strict sealing between the air spring piston 702 and the metal shell 701 is realized through the structure of the membrane body 703. According to the installation position of the main supporting device, the invention can realize the suppression of vibration in different directions. By adjusting the cross-sectional area of the air spring piston 702 and the initial volume of the air chamber, the vibration isolation performance of the vibration damping system can be changed, and the device parameters can be optimized according to the dynamic model of the device, so that the optimal remote vibration damping characteristic is realized. The air spring can be replaced by other spring and damping vibration attenuation elements.
In addition, in order to adaptively adjust the air intake amount of the air spring according to the pressure of the object to be isolated from vibration, as shown in fig. 1 and 3, an intake valve 705 and a driver 706 are provided on one side of the air spring, a controller 9 is provided between the sensor 8 and the driver 706, one end of the controller 9 is in communication link with the sensor 8 through a wire, and the other end is in communication link with the driver 706 and the current limiting device 5, respectively. The sensor 8 monitors the vibration characteristics of the vibration-isolated object 1 in real time, transmits the vibration characteristic signal to the controller 9, the controller 9 respectively outputs control signals to the driver 706 and the current limiting device 5 after processing, the driver 706 drives the air inlet valve 705 to act, the air spring 7 is inflated, and primary vibration isolation of the vibration-isolated object 1 is realized. In addition, the controller 9 controls the action of the flow limiting device 5, so that the flow of the viscous liquid 6 is accurately controlled, secondary accurate vibration isolation of the vibration-isolated object 1 is realized, and the vibration isolation performance is greatly improved through the secondary vibration isolation.
The sensor 8 may be an acceleration sensor or a force sensor, measures the vibration characteristics of the vibration-isolated object 1, and transmits an acceleration signal or a force signal to the controller 9. The controller 9 processes the signal by using an LMS vibration test system to obtain the vibration transfer function and the acceleration impedance z of the vibration isolation object 1aOr admittance HaAnd the curve is obtained, so that the rigidity k and the damping c required by vibration reduction are obtained.
Figure BDA0001837113850000081
Figure BDA0001837113850000082
Figure BDA0001837113850000083
Where w represents frequency, m represents mass, j represents complex term, c represents damping, and k represents stiffness.
The air spring 7 in the remote vibration damping system mainly provides rigidity required by vibration damping, and the current limiting device 5 mainly provides damping required by vibration damping. The cross sectional area or volume of the air chamber of the air spring can be obtained by the formula (1) in real time under the condition that the rigidity required by vibration reduction is known, and the cross sectional area or volume of the air chamber 701 can be adjusted in real time by driving the air inlet valve 705 through the driver 706. In the case of a known damping required for vibration damping, an appropriate damping calculation formula, the cross-sectional area of the flow restriction 5 or the orifice length, is selected on the basis of the ratio of the orifice length to the cross-sectional area. The remote vibration damping system continuously performs self-adaptive change of rigidity and damping according to signals acquired by the sensor in real time, closed-loop control is realized, and real-time vibration damping performance is improved to a great extent. According to the invention, the vibration isolation performance of the vibration damping system can be changed by adjusting the cross section area of the air spring piston and the initial volume of the air chamber, and the parameters of the device can be optimized according to the dynamic model of the device, so that the optimal remote vibration damping characteristic is realized. Meanwhile, the main support device is formed by the piston and the cylinder barrel, the piston and the cylinder barrel generate relative displacement to compress viscous liquid, the internal pressure of the viscous liquid is increased, the viscous liquid flows out of the main support device, and better bearing capacity can be provided. Furthermore, the remote vibration reduction system continuously carries out self-adaptive change of rigidity and damping according to signals acquired by the sensor in real time, closed-loop control is realized, and real-time vibration reduction performance is improved to a great extent. Furthermore, the vibration characteristic is transmitted through the viscous liquid, so that heat can be taken away to a certain extent, and the heat dissipation effect is improved.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. An adaptive remote active damping system is characterized by comprising a main supporting device, a liquid transmission channel (4), a controller (9) and a remote damping device, wherein two ends of the liquid transmission channel (4) and the controller (9) are respectively connected with the main supporting device and the remote damping device to form a closed loop structure; wherein the content of the first and second substances,
the main supporting device is of a hydraulic cylinder structure and comprises a piston (2) and a cylinder barrel (3), one end of the piston (2) is connected with an object (1) to be subjected to vibration isolation, the other end of the piston can move along the cylinder barrel (3) under the action of the object (1) to be subjected to vibration isolation, and a first opening communicated with the liquid transmission channel (4) is formed in the bottom of the cylinder barrel (3);
the remote vibration damper is a sealed container, a horizontally movable baffle is arranged in the middle of the sealed container, and the sealed container is divided into an upper sealed part and a lower sealed part by the baffle; the lower part of the sealed container is provided with a second opening communicated with the liquid transmission channel (4), the cylinder (3), the liquid transmission channel (4) and the lower part of the sealed container are filled with viscous liquid (6), and the viscous liquid (6) can flow in the cylinder (3), the liquid transmission channel (4) and the lower part of the sealed container through the first opening and the second opening; the upper part of the sealed container is provided with an air spring (7), the control end of the air spring (7) is connected with a controller (9), the controller (9) sends a working instruction to the air spring (7) according to the vibration characteristic of the vibration-isolated object (1), then the air spring (7) changes the pressure of the air spring according to the instruction, and further the pressure which is equivalent to but opposite to the pressure generated by the vibration-isolated object (1) is applied to the viscous liquid (6), so that the flow of the viscous liquid (6) is limited, and the real-time effective remote vibration isolation of the vibration-isolated object (1) is realized;
the controller (9) adopts an LMS vibration test system to process the vibration characteristics of the vibration-isolated object (1) to obtain the vibration transfer function and the acceleration impedance z of the vibration-isolated object (1)aOr admittance HaA curve is obtained, so that the rigidity k and the damping c required by vibration reduction are obtained;
Figure FDA0002284372850000011
Figure FDA0002284372850000021
Figure FDA0002284372850000022
where ω represents frequency, m represents mass, and j represents a complex term.
2. An adaptive remote active damping system according to claim 1, wherein the air spring (7) comprises a metal housing (701), the metal housing (701) is sealed to form an air cavity (704), an air spring piston (702) is arranged at the bottom of the air cavity (704), a membrane body (703) is arranged between the air spring piston (702) and the air cavity (704), and the rigid sealing between the air spring piston (702) and the metal housing (701) is realized through the structure of the membrane body (703).
3. An adaptive remote active vibration damping system according to claim 1, characterized in that an air inlet valve (705) and an actuator (706) are arranged on one side of the air spring (7), the controller (9) is connected with the main supporting device in a communication way through one end of a wire, the other end of the wire is connected with the actuator (706) in a communication way, and the actuator (706) is used for receiving instructions of the controller (9) and driving the air inlet valve (705) to act to realize gas filling.
4. An adaptive remote active vibration damping system according to any one of claims 1 to 3, wherein a flow limiting device (5) is arranged on the liquid transmission channel (4), a control end of the flow limiting device (5) is connected with the controller (9), and the controller (9) is used for controlling the opening degree of the flow limiting device (5) according to the vibration characteristics of the vibration-isolated object (1) so as to limit the flow of the viscous liquid (6), thereby realizing real-time effective secondary remote vibration isolation on the vibration-isolated object (1).
5. An adaptive remote active damping system according to claim 4, characterized in that the flow restriction device (5) is a throttle or a damper.
6. An adaptive remote active damping system according to claim 1, wherein the first and second openings are centrally located at a height of at least 5mm below the level of the viscous liquid (6).
7. An adaptive remote active damping system according to claim 1 or 5, characterized in that the outside of the liquid transmission channel (4) is provided with a circle of circular opening reed along the circumference, and the opening reed is used for changing the diameter of the liquid transmission channel (4) through bolt adjustment so as to change the damping thereof.
8. An adaptive remote active damping system according to claim 1, characterized in that a sensor (8) is provided on the object (1) to be vibration isolated, said sensor (8) being connected to said controller (9).
9. An adaptive remote active damping system according to claim 8, characterized in that the sensor (8) is an acceleration sensor or a force sensor for measuring in real time the vibration characteristics of the vibration-isolated object (1) and transmitting signals of the vibration characteristics to the controller (9).
CN201811230814.9A 2018-10-22 2018-10-22 Self-adaptive remote active vibration reduction system Active CN109356959B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811230814.9A CN109356959B (en) 2018-10-22 2018-10-22 Self-adaptive remote active vibration reduction system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811230814.9A CN109356959B (en) 2018-10-22 2018-10-22 Self-adaptive remote active vibration reduction system

Publications (2)

Publication Number Publication Date
CN109356959A CN109356959A (en) 2019-02-19
CN109356959B true CN109356959B (en) 2020-01-21

Family

ID=65346055

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811230814.9A Active CN109356959B (en) 2018-10-22 2018-10-22 Self-adaptive remote active vibration reduction system

Country Status (1)

Country Link
CN (1) CN109356959B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021013441A1 (en) 2019-07-19 2021-01-28 Asml Netherlands B.V. Temperature conditioning system
CN110597313B (en) * 2019-09-19 2020-12-22 中国核动力研究设计院 Method of multi-channel active control system for pipeline vibration under multiple excitation sources
CN113757564B (en) * 2021-08-12 2023-03-21 中国船舶重工集团公司第七一九研究所 Hydraulic pressure measuring device
CN116146664B (en) * 2023-04-23 2023-09-22 中国第一汽车股份有限公司 Vibration damper and vehicle

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5533586A (en) * 1994-02-01 1996-07-09 Arctco, Inc. Adjustable suspension system
CN100552256C (en) * 2008-04-17 2009-10-21 上海交通大学 Magnetic rheology elastic body active-passive integrated damper based on extrusion type applied force
CN101818777B (en) * 2010-05-07 2011-08-10 华中科技大学 Self-adaptive damping variable ultra-precise vibration absorber
CN103267081B (en) * 2013-05-10 2016-01-27 河南理工大学 A kind of piezoelectric power generation type damping-adjustable hydro-pneumatic suspension for engineering machinery or farm machinery
CN103557260A (en) * 2013-09-30 2014-02-05 太仓康茂电子有限公司 Hydro-pneumatic spring
CN106321708B (en) * 2016-10-20 2018-02-23 华中科技大学 A kind of compound active vibration insulator of two-freedom vibration isolation and precision positioning

Also Published As

Publication number Publication date
CN109356959A (en) 2019-02-19

Similar Documents

Publication Publication Date Title
CN109356959B (en) Self-adaptive remote active vibration reduction system
JP2693434B2 (en) Damping force generator for suspension and operation control device thereof
EP0809040B1 (en) Fluid-filled elastic mount having orifice passages tuned to damp input vibrations in respective different frequency ranges
CN108458040B (en) Integrated adjustable double-layer vibration reduction module
CN108087473B (en) Gas-liquid bullet dual-frequency vibration isolator
JPH05202976A (en) Fluid mount with active vibration controller
CN203297461U (en) Hydro-pneumatic spring with variable parameters
CN103195856A (en) Parameter variable hydro-pneumatic spring
CN107740840B (en) Shock absorber and engineering vehicle
CN109808425B (en) Damping and rigidity adjustable tire
CN102338188B (en) Air spring vibration isolator based on piston type liquid viscous damping action
CN102330782B (en) Air spring vibration isolator based on gas-liquid damping and coupling action
JP3335159B2 (en) Hydraulic buffer bearing
CN102330767B (en) Air spring vibration isolator based on gas-solid damping and coupling action adjusted by air cylinder
CN207961392U (en) Damper and engineering truck
KR20030068253A (en) System for isolating vibration and noise using magnetorheological fluid damper
CN109695653B (en) Integrated damping and rigidity adjusting device
CN215171781U (en) Built-in damping vibration damper
CN115263992A (en) Three-way wide-frequency large-load vibration reduction device based on frequency-adjustable vibration absorption and active vibration isolation
CN108194573A (en) A kind of adaptive vibrating isolation system of multi-state and its control method
CN213056675U (en) Active suspension control device
CN112178110B (en) Liquid elastic vibration isolator capable of achieving assembly type frequency modulation
CN212107440U (en) Pipeline vibration absorption device based on nonlinear adjustment technology
CN113279322A (en) Bridge vibration damping viscous damper made of metal
CN113357302A (en) Built-in damping vibration damper

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant