CN102413401B - Novel intelligent vibration isolation noise reduction composite structure system and usage method thereof - Google Patents
Novel intelligent vibration isolation noise reduction composite structure system and usage method thereof Download PDFInfo
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- CN102413401B CN102413401B CN201110288217.3A CN201110288217A CN102413401B CN 102413401 B CN102413401 B CN 102413401B CN 201110288217 A CN201110288217 A CN 201110288217A CN 102413401 B CN102413401 B CN 102413401B
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Abstract
The invention provides a novel intelligent vibration isolation noise reduction composite structure system and a usage method thereof. The system comprises: a feedback piezoelectricity sensing element, an upper insulation transition layer, an upper flexible electrode, an actuator unit, a lower flexible electrode, a lower insulation transition layer and a piezoelectric sensing element. The feedback piezoelectricity sensing element, the actuator unit and the piezoelectric sensing element are connected with a controller through a line. When one sensor perceives external vibration, the controller adds a control voltage to the electrode coated on electroactive polymer surface according to different controlled objects and a control algorithm so that the actuator performs inverse deformation to control vibration transmission. And the other feedback piezoelectricity sensing element is taken as a feedback element which plays a supervision role. A small block which uses the structure is made to firmly stick on a submarine surface. Because of the inverse deformation, the control actuator can control sound radiation of a submarine. By using the system and the method of the invention, vibration isolation and noise abatement in high, middle and low frequency system can be completed. The system and the method can be widely used in the submarine, aerospace, precise instrument equipment vibration isolation field.
Description
Technical field
The present invention relates to a kind of vibration insulation and noise reduction system, especially a kind of novel intelligent vibration insulation and noise reduction composite structural system and using method thereof in fields such as submarine, Aero-Space, micro-nano instrument and equipment vibration isolation with extensive use.
Background technology
Traditional active and passive vibration insulation and noise reduction device is mainly that the damping by adjusting structure, the relation of coordinating between spring, damping and quality consume by raising the object that vibrational energy is realized control vibration.The interpolation damping structure of Passive Control is divided into again free damping structure, constrained damping structure and embedded damping structure.And traditional vibration control way has two kinds: a kind of is with vibration isolator, the equipment vibrating and ground to be separated, prevent that the vibration of equipment is transmitted to ground, belong to active vibration isolation; Another kind is with vibration isolator, the ground vibrating and equipment to be separated, and prevents that the vibration of ground is transmitted to equipment, belongs to passive insulation.These two kinds of vibration control ways all need designer by adjusting rational spring and damping size, to complete the vibration control of structure.Yet when environmental condition changes, vibration isolating effect also just changes thereupon, therefore just there is the intelligent structure of using transducer and actuator to control vibration.The Based Intelligent Control problem of structural vibration at present is mainly divided into two classes, and first ACTIVE CONTROL damping structure utilizes exactly piezoelectric to control and pastes the distortion of viscoelastic material on member, thereby reaches the damping that improves structure, realizes the control to vibrational system; And another kind is by piezoelectric transducer and actuator, structure is carried out static state or dynamically controlled.But due to defects such as the piezoelectric constant of traditional electricity telescopic material processed are low, dependent variable is little, density is high, cannot realize the accurate control to mechanical oscillatory structure.
Summary of the invention
The object of the invention is for overcoming above-mentioned the deficiencies in the prior art, provide a kind of isolation frequency wide ranges, precision is high, power consumption is few, can realize novel intelligent vibration insulation and noise reduction composite structural system and using method thereof to the accurate isolation of mechanical oscillatory structure.
For achieving the above object, the present invention adopts following technical proposals:
A kind of novel intelligent vibration insulation and noise reduction composite structural system, comprise the feedback piezoelectric sensor element setting gradually from top to bottom, upper insulation transition zone, upper flexible electrode, actuator unit, lower flexible electrode, lower insulation transition zone and piezoelectric sensor element, described feedback piezoelectric sensor element, actuator unit and piezoelectric sensor element are all connected with controller by circuit.
As required, total can be laterally zygomorphic can be also asymmetrical.
Described actuator unit comprises the electric field type electroactive polymer part being composed in series by some layers of electroactive polymer piezoelectric membrane, and the upper and lower surface of every layer of electric field type electroactive polymer is connected with lower flexible electrode with upper flexible electrode respectively.
Described feedback piezoelectric sensor element and piezoelectric sensor element can be that piezoelectric ceramic can be also electric field type electroactive polymer.
Described electroactive polymer piezoelectric membrane all can adopt PVDF resin.
Described upper flexible electrode and lower flexible electrode all can adopt graphite flexible electrode.
The setting of the described electroactive polymer piezoelectric membrane number of plies, according to the amplitude being vibrated by control object, determine, be that electric field type electroactive polymer part deflection under the effect of maximum controlling voltage is greater than the amplitude of controlled device, and have the distortion deposit of 10%-50%.
Described controller will have high data acquisition and data operation control ability, as the computer control system of the NI of American National instrument company.
A kind of using method of novel intelligent vibration insulation and noise reduction composite structural system, described composite structural system is made to fritter and be firmly attached to submarine surface continuously, controller is controlled respectively the acoustic radiation that the every anti-phase deformation energy of actuator unit is controlled submarine, this composite structural system will completely cut off equipment and the propagation medium of vibration as vacuum band, make noenergy transmission between submarine hull and seawater, realize the acoustic radiation that reduces or eliminate underwater research vehicle three-dimensional structure.
It is light that the present invention makes full use of some polymer (as PVDF) quality of materials, under electric field action, distortion is large, driving voltage is low, sound transmission absorbent properties are good, the advantages such as the fast and indefatigability damage of reaction speed, a kind of novel intelligent multi-layer compound structure vibration isolation sound-attenuating system is proposed, mainly by machinery and control two parts, formed, the sandwich that its mechanical part is is actuator by electric field type electroactive polymer, piezoelectric is that the insulating material between transducer and electroactive polymer and transducer is that transition zone forms a kind of multilayer sandwich composite construction, when wherein a sensor senses is to extraneous vibration, by controller part, according to different control targets and control algolithm thereof, add control voltage to the flexible electrode that is coated in electric field type electroactive polymer surface, thereby the anti-phase distortion of the actuator that makes electric field type electroactive polymer realizes the object of controlling vibration transmission, and another piece piezoelectricity covering is as feedback element, " task " performance of " supervision " actuator, realization is to accurate machine construction intelligence vibration isolation object.When this structure being made to fritter, be firmly attached under water on battleship surface continuously, this system will completely cut off equipment and the propagation medium of vibration as vacuum band, make noenergy transmission between submarine hull and seawater, realize the object that reduces or eliminate the acoustic radiation of underwater research vehicle three-dimensional structure, particularly, for the low frequency vibration isolation noise reduction problem in puzzlement Noise and Vibration Control field, finally realize this and invent distinctive active vibration isolation decrease of noise functions.Thereby realize the real low voice of submarine, go into hiding, complete the task that it is hidden in the ballistic missile firing base moving about in seabed.This system at the aspects such as Stability and veracity of vibration isolation, noise reduction, noise elimination all more traditional structure have obvious advantage, in fields such as submarine, Aero-Space, micro-nano instrument and equipment vibration isolation, be with a wide range of applications.
Method for designing of the present invention is different from traditional vibration insulation and noise reduction completely, and the present invention has jumped out traditional design concept and changed by consuming in a large number vibrational energy mode the object that active active vibration isolation mode reaches control vibration reduction noise radiation into.The vibration isolation that can not only complete medium-high frequency system is eliminated the noise, and also effective to low frequency system.Due to this composite construction at the aspects such as Stability and veracity of vibration isolation, noise reduction, noise elimination all more traditional structure have obvious advantage, the active vibration isolation noise-reducing design that can be underwater research vehicle, precision instrument, bullet train provides strong technical support.
Because pvdf resin piezoelectric is flexible except having, can be fully bonding with testee surface, can cut randomly, can make porous surface (sound absorbing capabilities is good), piezoelectric voltage constant high (higher 10～20 times than PZT), dependent variable large (can surpass 4%), density low (only have PZT 1/4), response frequency wide (having advantages of from 0.1Hz to 10MHz wide in range), also have outstanding ferroelectric simultaneously, the performance such as good and large electrostriction with underwater sound impedance matching, these Strange properties have been given the application potential of this material in micro-driving field just, that ideal active sonar transducer and the vibration isolation of underwater research vehicle disappear, sound-absorbing material.The present invention make full use of some polymer as vinylidene fluoride electroactive polymer (PVDF) have quality light, under electric field action, can there is large deformation, driving voltage is low, reaction speed is fast, indefatigability damage, Yi Yushui form the good advantages such as acoustic impedance coupling, the mechanical property of Novel electric field pattern living polymer is combined with the mechanical property of piezoelectric, design the compound vibration isolation noise elimination structure of novel intelligent system.
The present invention utilizes the computer control system of the NI of American National instrument company to control the mechanical part of novel intelligent vibration insulation and noise reduction composite structural system.
During the invention process, utilizing multi-layer piezoelectric film series system to complete thicker piezoelectric actuator makes, with flexible adhesion glue and flexible electrode, allow interlayer have certain distortion and can not come off, according to the load of control object and amplitude, will in actuator, apply certain initial bias voltage.
Accompanying drawing explanation
Fig. 1 novel intelligent vibration insulation and noise reduction composite junction composition;
Fig. 2 novel intelligent vibration insulation and noise reduction composite construction control chart;
Series connection and the circuit connection of Fig. 3 multi-layer piezoelectric film.
Wherein 1. feedback piezoelectric sensors, 2. go up flexible electrode, the transition zone that insulate on 3., and 4. electric field type electroactive polymer part, 5. time insulation transition zone, 6. piezoelectric sensor, 7. descends flexible electrode.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As Figure 1-3, a kind of novel intelligent vibration insulation and noise reduction composite structural system, comprise the feedback piezoelectric sensor element 1 setting gradually from top to bottom, upper insulation transition zone 3, upper flexible electrode 2, actuator unit 4, lower flexible electrode 7, lower insulation transition zone 5 and piezoelectric sensor element 6, described feedback piezoelectric sensor element 1, actuator unit 4 and piezoelectric sensor element 6 are all connected with controller by circuit.
Described actuator unit comprises the electric field type electroactive polymer part 4 being composed in series by some layers of electroactive polymer piezoelectric membrane, and the upper and lower surface of electric field type electroactive polymer part is connected with lower flexible electrode 7 with upper flexible electrode 2 respectively.
Described electroactive polymer piezoelectric membrane all can adopt PVDF resin.
Described flexible electrode 2 is for all adopting graphite flexible electrode.
The setting of the described electroactive polymer piezoelectric membrane number of plies, according to the amplitude being vibrated by control object, determine, be that electric field type electroactive polymer part deflection under the effect of maximum controlling voltage is greater than the amplitude of controlled device, and have the distortion deposit of 10%-50%.
Described controller adopts the computer control system of the NI of American National instrument company.
The present invention designs for reducing vibration isolation noise elimination and the highly sophisticated device equipment vibration insulation and noise reduction of undersea ship, it is that " covering " and the insulating material between sandwich and covering that by electroactive polymer (as PVDF resin), for the sandwich of actuator, piezoelectric, are transducer are a kind of multilayer sandwich composite construction that transition zone forms, and specifically sees Fig. 1.When wherein a covering sensor senses is to extraneous vibration, by controller, according to different control targets and control algolithm thereof, add control voltage to the flexible electrode that is coated in electroactive polymer surface, thereby make actuator distortion realize the requirement of vibration isolation target, and another piece piezoelectricity covering is as feedback element, " task " performance of " supervision " actuator.When requiring to feed back the acceleration (or displacement) of piezoelectric board and be zero, this mechanism has just realized accurate vibration isolation between two sensors, and Fig. 2 is shown in the control of novel intelligent vibration insulation and noise reduction composite construction.When this structure being made to fritter, be firmly continuously attached on battleship under water or the stronger equipment of other acoustic radiation, this structure will completely cut off equipment and the propagation medium of vibration as vacuum band, realize the object that reduces noise radiation, particularly for the low-frequency noise control problem that perplexs Noise and Vibration Control field.Because this novel intelligent vibration insulation and noise reduction composite construction has isolation frequency wide ranges, precision is high, power consumption is few, and the high-tech area such as submarine, precision instrument, large aircraft has broad application prospects under water.
Implementing method:
Paste technique, for overcoming the inconsistency of each stratified deformation, bonding is general with the good flexible adhesion glue of adhesive property, such as high performance AB glue, allows interlayer to have certain distortion, but can not come off.
Electric field type electroactive polymer part is by multilayer electroactive polymer Piezoelectric Film for Designing, in general, in the manufacture craft of PVDF piezoelectric membrane, there is a procedure to polarize exactly, if it is too thick that piezoelectric membrane is done, polarizing voltage will be high especially, and often thin film is the vibration that can not realize collocation structure surface.Here adopt the mode of plural layers series connection, when not increasing polarizing voltage, realize the actuator after plural layers form, complete the bit shift compensation on structural vibration surface, realize the series connection of multi-layer piezoelectric film and the wiring of electrode according to Fig. 3.
The setting of the piezoelectric membrane number of plies, determine according to the amplitude being vibrated by control object, and the deflection of general whole PVDF under maximum controlling voltage effect is greater than the amplitude of controlled device, and has the distortion deposit of 10%-50%.
Flexible electrode, the electrode of PVDF piezoelectric membrane also will be used flexible electrode (as graphite flexible electrode), allows electrode with the distortion of PVDF piezoelectric membrane.
Feedback piezoelectric sensor element and piezoelectric sensor element can be that piezoelectric ceramic can be also electric field type electroactive polymer part.
Control hardware circuit, adopt the computer control system of the NI of American National instrument company, according to the load of control object and control distortion, to in actuator, apply certain initial bias voltage, for PVDF provides initial polarization charge, by the organic assembling of mechanical part and control section, finally realize this and invent distinctive active vibration isolation decrease of noise functions.
Claims (3)
1. a novel intelligent vibration insulation and noise reduction composite structural system, it is characterized in that: comprise the feedback piezoelectric sensor element setting gradually from top to bottom, upper insulation transition zone, upper flexible electrode, actuator unit, lower flexible electrode, lower insulation transition zone and piezoelectric sensor element, described feedback piezoelectric sensor element, actuator unit and piezoelectric sensor element are all connected with controller by circuit;
Described actuator unit comprises the electric field type electroactive polymer part that the piezoelectric membrane by some layers of electroactive polymer is composed in series, and the upper and lower surface of electric field type electroactive polymer part is respectively upper flexible electrode and lower flexible electrode;
Described upper flexible electrode and lower flexible electrode are to be all out of shape and adeciduate electrode with actuator element;
The setting of the described electroactive polymer piezoelectric membrane number of plies, according to the amplitude being vibrated by control object, determine, be that electric field type electroactive polymer part deflection under the effect of maximum controlling voltage is greater than the amplitude of controlled device, and have the distortion deposit of 10%-50%.
2. novel intelligent vibration insulation and noise reduction composite structural system according to claim 1, is characterized in that: described feedback piezoelectric sensor element and piezoelectric sensor element are piezoelectric ceramic or electric field type electroactive polymer.
3. the using method of a novel intelligent vibration insulation and noise reduction composite structural system as claimed in claim 1, it is characterized in that: described composite structural system is made to fritter and be firmly attached to submarine surface continuously, controller is controlled respectively the acoustic radiation that the every anti-phase deformation energy of actuator unit is controlled submarine, this composite structural system will completely cut off equipment and the propagation medium of vibration as vacuum band, make noenergy transmission between submarine hull and seawater, realize the acoustic radiation that reduces or eliminate underwater research vehicle three-dimensional structure.
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| CN107749293A (en) * | 2017-09-12 | 2018-03-02 | 滁州远方车船装备工程有限公司 | A kind of broad band sound absorption glued board with interlayer structure and preparation method thereof |
| CN108506399B (en) * | 2018-04-02 | 2020-02-18 | 上海交通大学 | Adjustable rigidity support device based on dielectric elastomer |
| CN108671360A (en) * | 2018-06-20 | 2018-10-19 | 南京信息工程大学 | A kind of mangneto hypnotization device and its method |
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| CN100572849C (en) * | 2007-09-30 | 2009-12-23 | 北京航空航天大学 | Isolation mounting |
| CN101446834A (en) * | 2008-12-04 | 2009-06-03 | 北京航空航天大学 | Real-time controlling system of intelligent active vibration isolation unit |
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