CN202334863U - Novel intelligent vibration isolation and noise reduction complex structure system - Google Patents
Novel intelligent vibration isolation and noise reduction complex structure system Download PDFInfo
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- CN202334863U CN202334863U CN2011203618506U CN201120361850U CN202334863U CN 202334863 U CN202334863 U CN 202334863U CN 2011203618506 U CN2011203618506 U CN 2011203618506U CN 201120361850 U CN201120361850 U CN 201120361850U CN 202334863 U CN202334863 U CN 202334863U
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- noise reduction
- novel intelligent
- flexible electrode
- electroactive polymer
- vibration isolation
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Abstract
The utility model discloses a novel intelligent vibration isolation and noise reduction complex structure system, which comprises a feedback piezoelectric sensing element, an upper insulating transition layer, an upper flexible electrode, an executor unit, a lower flexible electrode, a lower insulating transition layer and a piezoelectric sensing element arranged in sequence from top to bottom, wherein the feedback piezoelectric sensing element, the executor unit and the piezoelectric sensing element are all connected with a controller by circuits. When one sensor senses external vibration, the controller applies a control voltage on an electrode coated on the surface of an electric active polymer according to different control objects and control algorithms so that the executor controls vibration transmission in a manner of inverse deformation, while the other feedback piezoelectric sensing element plays a supervisory role as a feedback element. The structure is made into a small piece which is firmly attached to the surface of a submarine with no clearance, and the sound radiation of the submarine can be controlled by controlling the inverse deformation of the executor. The novel intelligent vibration isolation and noise reduction complex structure system can achieve vibration isolation and noise elimination of high-frequency, intermediate-frequency and low-frequency systems, and has wide application prospect in the vibration isolation fields of submarine, aerospace and precise apparatus.
Description
Technical field
The utility model relates to a kind of vibration insulation and noise reduction system, and especially a kind of have the novel intelligent vibration insulation and noise reduction composite construction system of extensive use in fields such as submarine, Aero-Space, micro-nano instrument and equipment vibration isolation.
Background technology
Traditional master, passive vibration isolation denoising device mainly are to consume the purpose that vibrational energy is realized the control vibration through the relation between the damping of adjustment structure, coordination spring, damping and the quality through improving.The interpolation damping structure of Passive Control is divided into free damping structure, constrained damping structure and embedded damping structure again.And traditional vibration control way has two kinds: a kind of is to separate with equipment and ground that vibration isolator will vibrate, prevents that the vibration of equipment from passing to ground, belongs to active vibration isolation; Another kind is to separate with ground and equipment that vibration isolator will vibrate, prevents that the vibration of ground from passing to equipment, belongs to passive insulation.These two kinds of vibration control ways all need the designer to accomplish structural vibrations control through adjusting rational spring and damping size.Yet when environmental condition changed, vibration isolating effect also just changed thereupon, the intelligence structure of using transducer and actuator that vibration is controlled therefore just occurred.The Based Intelligent Control problem of structural vibration at present mainly is divided into two types, and first ACTIVE CONTROL damping structure utilizes piezoelectric control to paste the distortion of viscoelastic material on member exactly, thereby reaches the damping that improves structure, realizes the control to vibrational system; And another kind is with piezoelectric transducer and actuator structure to be carried out static state or dynamically control.But because low, the defectives such as dependent variable is little, density height of piezoelectric constant of traditional electricity system telescopic material can't realize the accurate control to mechanical oscillatory structure.
The utility model content
The purpose of the utility model is for overcoming the deficiency of above-mentioned prior art, provide a kind of isolation frequency wide ranges, precision height, power consumption to lack, can realizing the novel intelligent vibration insulation and noise reduction composite construction system to the accurate isolation of mechanical oscillatory structure.
For realizing above-mentioned purpose, the utility model adopts following technical proposals:
A kind of novel intelligent vibration insulation and noise reduction composite construction system; Comprise the feedback piezoelectric sensor element that sets gradually from top to bottom, on insulate transition zone, go up flexible electrode, actuator unit, flexible electrode, insulate transition zone and piezoelectric sensor element down down, said feedback piezoelectric sensor element, actuator unit and piezoelectric sensor element all link to each other with controller through circuit.
As required, total can be laterally zygomorphic also can be asymmetric.
Said actuator unit comprises the electric field type electroactive polymer spare that is composed in series by several layers electroactive polymer piezoelectric membrane, and the upper and lower surfaces of every layer of electric field type electroactive polymer is connected with following flexible electrode with last flexible electrode respectively.
Said feedback piezoelectric sensor element and piezoelectric sensor element can be that piezoelectric ceramic also can be the electric field type electroactive polymer.
Said electroactive polymer piezoelectric membrane all can adopt the PVDF resin.
The said flexible electrode of going up all can adopt the graphite flexible electrode with following flexible electrode.
The setting of the said electroactive polymer piezoelectric membrane number of plies; Amplitude according to the vibration of Be Controlled object is confirmed; Be that electric field type electroactive polymer spare deflection under the effect of maximum controlling voltage is greater than the amplitude of controlled device, and the distortion deposit of 10%-50% is arranged.
Said controller will have high data acquisition and data operation control ability, like the computer control system of the NI of American National instrument company.
Fritter is made by described composite construction system firmly be attached to the submarine surface continuously; Controller is controlled the acoustic radiation of every actuator unit anti-phase deformation energy control submarine respectively; This composite construction system will be as the equipment and the propagation medium of the isolated vibration of vacuum band; Make noenergy transmission between submarine hull and the seawater, realize reducing or eliminating the acoustic radiation of underwater research vehicle three-dimensional structure.
The utility model makes full use of that some polymer (like PVDF) quality of materials is light, distortion is greatly under electric field action; Driving voltage is low, the sound transmission absorbent properties are good, reaction speed is fast and advantage such as indefatigability damage; A kind of novel intelligent multi-layer compound structure vibration isolation sound-attenuating system is proposed; Mainly form by machinery and control two parts; Its mechanical part is to be that sandwich, the piezoelectric of actuator is that insulating material between transducer and electroactive polymer and the transducer is that transition zone constitutes a kind of multilayer sandwich composite construction by the electric field type electroactive polymer; When wherein a sensor senses is to extraneous vibration; Add control voltage for the flexible electrode that is coated in electric field type electroactive polymer surface by the controller part according to Different control target and control algolithm thereof, thereby make the purpose of the actuator anti-phase distortion realization control vibration transfer of electric field type electroactive polymer, and another piece piezoelectricity covering is as feedback element; " task " performance of " supervision " actuator realizes accurate machine construction intelligence vibration isolation purpose.Firmly be attached under water on the battleship surface when this structure being made fritter continuously; This system will be as the equipment and the propagation medium of the isolated vibration of vacuum band; Make noenergy transmission between submarine hull and the seawater; Realize reducing or eliminating the purpose of the acoustic radiation of underwater research vehicle three-dimensional structure, particularly, finally realize the distinctive active vibration isolation decrease of noise functions of this utility model for the low frequency vibration isolation noise reduction problem in puzzlement Noise and Vibration Control field.Thereby the real low voice of realization submarine is gone into hiding, and accomplishes the task that it is hidden in the ballistic missile firing base that moves about in the seabed.There is remarkable advantages in this system in all more traditional structures in aspect such as the accuracy of vibration isolation, noise reduction, noise elimination and stability, is with a wide range of applications in fields such as submarine, Aero-Space, micro-nano instrument and equipment vibration isolation.
The design of the utility model is different from traditional vibration insulation and noise reduction fully, and the utility model has been jumped out traditional design concept and changed the purpose that active active vibration isolation mode reaches control vibration reduction noise radiation into by lot of consumption vibrational energy mode.Can not only accomplish the vibration isolation of medium-high frequency system and eliminate the noise, and good effective to low frequency system.Because this composite construction has remarkable advantages in all more traditional structures in aspect such as the accuracy of vibration isolation, noise reduction, noise elimination and stability, the active vibration isolation noise-reducing design that can be underwater research vehicle, precision instrument, bullet train provides powerful technical support.
Because the pvdf resin piezoelectric is flexible except having, can be fully bonding with the testee surface, can cut randomly, can process the advantage of porous surface (sound absorbing capabilities is good), piezoelectric voltage constant high (higher 10～20 times), dependent variable big (can surpass 4%), density low (have only PZT 1/4), response frequency wide (having from 0.1Hz to 10MHz wide in range) than PZT; Also have simultaneously outstanding ferroelectric, with the underwater sound impedance matching performance such as good and big electrostriction; These unusual characteristics have been given the application potential of this material in little driving field just, are that the vibration isolation of very desirable active sonar transducer and underwater research vehicle disappears, sound-absorbing material.The utility model makes full use of some polymer such as vinylidene fluoride electroactive polymer (PVDF) has light weight, large deformation can take place under electric field action, driving voltage is low, reaction speed is fast, indefatigability is damaged, Yi Yushui forms good advantages such as acoustic impedance coupling; The mechanical property of novel electric field type living polymer is combined with the mechanical property of piezoelectric, design the compound vibration isolation noise elimination structure of novel intelligent system.
The utility model utilizes the computer control system of the NI of American National instrument company that the mechanical part of novel intelligent vibration insulation and noise reduction composite construction system is controlled.
The utility model utilizes multi-layer piezoelectric film series system to accomplish thicker piezoelectric actuator and makes when implementing; Allow interlayer that certain deformation is arranged and can not come off with flexible adhesion glue and flexible electrode, will on actuator, apply certain initial bias voltage according to the load and the amplitude of controlling object.
Description of drawings
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;
The series connection and the circuit connection of Fig. 3 multi-layer piezoelectric film.
Wherein 1. feedback piezoelectric sensors are 2. gone up flexible electrode, the transition zone that insulate on 3., and 4. electric field type electroactive polymer spare, 5. time insulation transition zone, 6. piezoelectric sensor 7. descends flexible electrode.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Shown in Fig. 1-3; A kind of novel intelligent vibration insulation and noise reduction composite construction system; Comprise the feedback piezoelectric sensor element 1 that sets gradually from top to bottom, on insulate transition zone 3, go up flexible electrode 2, actuator unit, flexible electrode 7, insulate transition zone 5 and piezoelectric sensor element 6 down down, said feedback piezoelectric sensor element 1, actuator unit all link to each other with controller through circuit with piezoelectric sensor element 6.
Said actuator unit comprises the electric field type electroactive polymer spare 4 that is composed in series by several layers electroactive polymer piezoelectric membrane, and the upper and lower surfaces of electric field type electroactive polymer spare is connected with following flexible electrode 7 with last flexible electrode 2 respectively.
Said electroactive polymer piezoelectric membrane all can adopt the PVDF resin.
Said flexible electrode 2 is for all adopting the graphite flexible electrode.
The setting of the said electroactive polymer piezoelectric membrane number of plies; Amplitude according to the vibration of Be Controlled object is confirmed; Be that electric field type electroactive polymer spare deflection under the effect of maximum controlling voltage is greater than the amplitude of controlled device, and the distortion deposit of 10%-50% is arranged.
Said controller adopts the computer control system of the American National NI of instrument company.
The utility model mainly is to design for vibration isolation noise elimination and the highly sophisticated device equipment vibration insulation and noise reduction that reduces undersea ship; It is to be that " covering " and the insulating material between sandwich and the covering of transducer is a kind of multilayer sandwich composite construction that transition zone constitutes by electroactive polymer (like the PVDF resin) for the sandwich of actuator, piezoelectric, specifically sees Fig. 1.When wherein a covering sensor senses is to extraneous vibration; Add control voltage for the flexible electrode that is coated in the electroactive polymer surface by controller according to Different control target and control algolithm thereof; Thereby make the actuator distortion realize the requirement of vibration isolation target; And another piece piezoelectricity covering is as feedback element, " task " performance of " supervision " actuator.When the acceleration that requires to feed back piezoelectric board (or displacement) was zero, this mechanism had just realized accurate vibration isolation between two sensors, and Fig. 2 is seen in the control of novel intelligent vibration insulation and noise reduction composite construction.Firmly be attached to continuously on the stronger equipment of battleship under water or other acoustic radiation when this structure being made fritter; This structure will be as the equipment and the propagation medium of the isolated vibration of vacuum band; Realize reducing the purpose of noise radiation, particularly for the low-frequency noise control problem that perplexs the Noise and Vibration Control field.Because this novel intelligent vibration insulation and noise reduction composite construction has the isolation frequency wide ranges, precision is high, power consumption is few, and high-tech areas such as submarine, precision instrument, large aircraft have broad application prospects under water.
Implementing method:
Paste technology, 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 that certain deformation is arranged, but can not come off.
Electric field type electroactive polymer spare is by multilayer electroactive polymer Piezoelectric Film for Designing; In general; There is one procedure to polarize exactly in the manufacture craft of PVDF piezoelectric membrane; If it is too thick that piezoelectric membrane is done, the height that polarizing voltage will be special, and often thin film is the vibration that can not realize the collocation structure surface.Here adopt the mode of plural layers series connection, when not increasing polarizing voltage, realize the actuator after plural layers are formed, accomplish 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 will be confirmed that the deflection of general whole PVDF under the maximum controlling voltage effect is greater than the amplitude of controlled device according to the amplitude of Be Controlled object vibration, and the distortion deposit of 10%-50% is arranged.
Flexible electrode, the electrode of PVDF piezoelectric membrane also will be used flexible electrode (like the graphite flexible electrode), allow the distortion of electrode with the PVDF piezoelectric membrane.
Feedback piezoelectric sensor element and piezoelectric sensor element can be that piezoelectric ceramic also can be an electric field type electroactive polymer spare.
The control hardware circuit; Adopt the computer control system of the American National NI of instrument company; Load and control distortion according to controlling object will apply certain initial bias voltage on actuator, coming provides initial polarization charge for PVDF; Through the organic assembling of mechanical part and control section, finally realize the distinctive active vibration isolation decrease of noise functions of this utility model.
Claims (5)
1. novel intelligent vibration insulation and noise reduction composite construction system; It is characterized in that: comprise the feedback piezoelectric sensor element that sets gradually from top to bottom, on insulate transition zone, go up flexible electrode, actuator unit, flexible electrode, insulate transition zone and piezoelectric sensor element down down, said feedback piezoelectric sensor element, actuator unit and piezoelectric sensor element all link to each other with controller through circuit.
2. novel intelligent vibration insulation and noise reduction composite construction according to claim 1 system, it is characterized in that: said feedback piezoelectric sensor element and piezoelectric sensor element are piezoelectric ceramic or electric field type electroactive polymer.
3. novel intelligent vibration insulation and noise reduction composite construction according to claim 1 system; It is characterized in that: said actuator unit comprises the electric field type electroactive polymer spare that the piezoelectric membrane by the several layers electroactive polymer is composed in series, and the upper and lower surfaces of electric field type electroactive polymer spare is respectively to go up flexible electrode and following flexible electrode.
4. novel intelligent vibration insulation and noise reduction composite construction according to claim 3 system is characterized in that: the said flexible electrode of going up all is to be out of shape and adeciduate electrode with actuator element with following flexible electrode.
5. novel intelligent vibration insulation and noise reduction composite construction according to claim 3 system; It is characterized in that: the setting of the said electroactive polymer piezoelectric membrane number of plies; Amplitude according to the vibration of Be Controlled object is confirmed; Be that electric field type electroactive polymer spare deflection under the effect of maximum controlling voltage is greater than the amplitude of controlled device, and the distortion deposit of 10%-50% is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203618506U CN202334863U (en) | 2011-09-26 | 2011-09-26 | Novel intelligent vibration isolation and noise reduction complex structure system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203618506U CN202334863U (en) | 2011-09-26 | 2011-09-26 | Novel intelligent vibration isolation and noise reduction complex structure system |
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| Publication Number | Publication Date |
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| CN202334863U true CN202334863U (en) | 2012-07-11 |
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| CN2011203618506U Expired - Fee Related CN202334863U (en) | 2011-09-26 | 2011-09-26 | Novel intelligent vibration isolation and noise reduction complex structure system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102413401A (en) * | 2011-09-26 | 2012-04-11 | 青岛理工大学 | Novel intelligent vibration isolation noise reduction composite structure system and usage method thereof |
| CN103954394A (en) * | 2014-03-10 | 2014-07-30 | 西安交通大学 | Flexible pressure sensor based on dielectric high-elastic polymer, and method for sensing pressure |
-
2011
- 2011-09-26 CN CN2011203618506U patent/CN202334863U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102413401A (en) * | 2011-09-26 | 2012-04-11 | 青岛理工大学 | Novel intelligent vibration isolation noise reduction composite structure system and usage method thereof |
| CN103954394A (en) * | 2014-03-10 | 2014-07-30 | 西安交通大学 | Flexible pressure sensor based on dielectric high-elastic polymer, and method for sensing pressure |
| CN103954394B (en) * | 2014-03-10 | 2015-11-25 | 西安交通大学 | Based on the pliable pressure sensor of the high-elastic polymkeric substance of dielectric and the method for sensed pressure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20170926 |