CN109000114B - Self-feedback tristable rigidity-variable micro-vibration isolation device based on PVC Gel - Google Patents
Self-feedback tristable rigidity-variable micro-vibration isolation device based on PVC Gel Download PDFInfo
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- CN109000114B CN109000114B CN201810934916.2A CN201810934916A CN109000114B CN 109000114 B CN109000114 B CN 109000114B CN 201810934916 A CN201810934916 A CN 201810934916A CN 109000114 B CN109000114 B CN 109000114B
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- vibration isolation
- pvc gel
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- 238000002955 isolation Methods 0.000 title claims abstract description 37
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 57
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 57
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 238000006073 displacement reaction Methods 0.000 claims abstract description 13
- 108010025899 gelatin film Proteins 0.000 claims abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 229920001746 electroactive polymer Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920002595 Dielectric elastomer Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
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- 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
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
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- 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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/002—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion characterised by the control method or circuitry
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- 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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/005—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion using electro- or magnetostrictive actuation means
- F16F15/007—Piezoelectric elements being placed under pre-constraint, e.g. placed under compression
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- 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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Combined Devices Of Dampers And Springs (AREA)
- Vibration Prevention Devices (AREA)
Abstract
A PVC Gel-based self-feedback tristable rigidity-variable micro-vibration isolation device comprises: frame, compliance mechanism and vibration isolation mechanism, wherein: the vibration isolation mechanism is arranged on the frame in a circumferential array mode, and the compliant mechanism is connected with the vibration isolation mechanism. The frame includes: the connecting block, the connecting ring and the mounting bracket; the compliant mechanism includes: a branch beam, a main beam and a central block; the vibration isolation mechanism includes: the adjusting shaft and set up the PVC Gel unit that is used for absorbing little energy on the adjusting shaft, it includes: a cathode plate, a polyvinyl chloride gel film, a mesh layer and an anode plate which are connected from top to bottom. The micro-vibration isolation mechanism changes the steady-state characteristic of the compliant mechanism through micro displacement, thereby obviously adjusting the rigidity, realizing better active control with micro energy loss, having better vibration isolation performance, simple structure, small mass, less energy consumption and high reliability.
Description
Technical Field
The invention relates to a technology in the field of micro-vibration control, in particular to a self-feedback tristable rigidity-variable micro-vibration isolation device based on PVC Gel.
Background
With the development of science and technology, the requirement of high-sensitivity devices on vibration isolation is higher and higher, for example, a high-precision camera on an observation satellite has a high requirement on the stability of the satellite in normal work, and the vibration is generally required to be lower than 1x10-4g-order, which presents a significant challenge to micro-vibration control. The general vibration control includes passive control, semi-active control, and active control. The passive vibration isolation platform mainly comprises a high-performance damper, and is stable in performance and high in reliability. However, the conventional passive vibration isolator has not ideal vibration isolation performance in a low frequency range (below 100 Hz); the active control technology can effectively inhibit low-frequency micro-vibration disturbance, but most of the existing active control devices have complex structures, large mass, large energy consumption and low reliability.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a PVC Gel-based self-feedback three-stable-state variable-rigidity micro-vibration isolation device, which changes the stable state characteristic of a compliant mechanism through micro displacement, so that the rigidity is obviously adjusted, the active control with better performance is realized through micro energy loss, and the device has better vibration isolation performance, simple structure, small mass, less energy consumption and high reliability.
The invention is realized by the following technical scheme:
the invention comprises the following steps: frame, compliance mechanism and vibration isolation mechanism, wherein: the vibration isolation mechanism is arranged on the frame in a circumferential array mode, and the compliant mechanism is connected with the vibration isolation mechanism.
The frame include: connecting block, go up ring and installing support, wherein: the mounting bracket circumference array sets up on the go-between, and the connecting block links to each other with the one end of mounting bracket.
The compliant mechanism comprises: corbel, girder and center block, wherein: the support beam circumferential array is arranged on the rack, two ends of the main beam are respectively connected with the support beams which are symmetrically arranged, the central block is fixedly connected with the middle part of the main beam, and the rigidity of the flexible mechanism is adjusted through small displacement.
The vibration isolation mechanism comprises: the adjusting shaft with set up a plurality of PVCGel units that are used for absorbing minute energy on the adjusting shaft, wherein: two ends of the adjusting shaft are respectively connected with the frame.
MFC piezoelectric patches are arranged on the upper side and the lower side of the main beam.
And two ends of the supporting beam are vertically bent and provided with through holes.
The PVC Gel units respectively form an upper PVC Gel column and a lower PVC Gel column, one end of the supporting beam is connected with the rack, and the other end of the supporting beam is arranged between the upper PVC Gel column and the lower PVC Gel column.
The PVC Gel unit comprises: a cathode plate, a polyvinyl chloride gel film, a mesh layer and an anode plate which are connected from top to bottom.
The adjusting shaft is arranged on the mounting bracket.
Technical effects
Compared with the prior art, the micro-vibration isolation mechanism has the advantages that the steady-state characteristic of the compliant mechanism is changed through micro displacement, so that the rigidity is obviously adjusted, the active control with better performance is realized through micro energy loss, the flexible vibration isolation is realized, the rigid bearing capacity is realized, the self-feedback control is realized by collecting the energy of vibration deformation, the micro-vibration isolation mechanism has better vibration isolation performance, and the micro-vibration isolation mechanism is simple in structure, small in mass, small in energy consumption and high in reliability.
Drawings
FIG. 1 is a schematic diagram of a first stable configuration of the present invention;
FIG. 2 is a schematic diagram of a second stable configuration of the present invention;
FIG. 3 is a schematic diagram of a third stable configuration of the present invention;
FIG. 4 is a cross-sectional view of the present invention;
FIG. 5 is an enlarged view of a portion A of FIG. 4;
FIG. 6 is a schematic view of a gantry of the present invention;
FIG. 7 is a schematic structural diagram of a PVC Gel column according to the present invention;
FIG. 8 is an exploded view of the PVC Gel unit structure according to the present invention;
FIG. 9 is a schematic diagram of the tristable control of the present invention;
FIG. 10 is a basic control flow diagram of the present invention;
in the figure: the device comprises a frame 1, a compliant mechanism 2, a vibration isolation mechanism 3, a support beam 4, a main beam 5, a central block 6, an MFC piezoelectric sheet 7, a lower PVCGel columnar body 8, an upper PVC Gel columnar body 9, an adjusting shaft 10, a connecting block 11, a connecting ring 12, a mounting bracket 13, a PVC Gel unit 14, a polyvinyl chloride Gel film 15, an anode plate 16, a cathode plate 17 and a mesh layer 18.
Detailed Description
As shown in fig. 1 to 4, the PVC Gel-based self-feedback tristable variable stiffness micro-vibration isolation device according to the present embodiment includes: frame 1, compliance mechanism 2 and vibration isolation mechanism 3, wherein: the vibration isolation mechanisms 3 are arranged on the rack 1 in a circumferential array, and the compliant mechanism 2 is connected with the vibration isolation mechanisms 3.
The frame 1 comprises: connecting block 11, connecting ring 12 and four installing supports 13, wherein: the adjacent mounting brackets 13 are arranged on the connecting ring 12 at intervals of 90 degrees, and the connecting block 11 is connected with the lower ends of the mounting brackets 13.
The compliant mechanism 2 comprises: four corbels 4, two girder 5 and a center block 6, wherein: the adjacent support beams 4 are arranged on the frame 1 at intervals of 90 degrees, two ends of the main beam 5 are respectively connected with the support beams 4 at intervals of 180 degrees, and the central block 6 is fixedly connected with the middle part of the main beam 5.
The vibration isolation mechanism 3 includes: an adjusting shaft 10 and a plurality of PVC Gel units 14 arranged on the adjusting shaft 10.
The PVC Gel units 14 respectively form an upper PVC Gel columnar body 9 and a lower PVC Gel columnar body 8, the upper end of the supporting beam 4 is connected with the mounting bracket 13, and the other end of the supporting beam is arranged between the upper PVC Gel columnar body 9 and the lower PVC Gel columnar body 8.
And two ends of the supporting beam 4 are vertically bent and are provided with through holes.
MFC piezoelectric patches 7 are arranged on the upper side and the lower side of the main beam 5.
The adjusting shaft 10 is arranged on the mounting bracket 13.
The PVC Gel unit 14 includes: a cathode plate 17, a polyvinyl chloride gel film 15, a mesh layer 18 and an anode plate 16 connected from top to bottom.
The polyvinyl chloride gel film 15 is used as an electroactive polymer and can deform after being electrified, and the thickness of the polyvinyl chloride gel film is preferably 0.7-1.3 mm.
the signal processing circuit collects and processes voltage signals of the MFC piezoelectric patches and transmits the voltage signals to the control circuit, the control circuit controls the voltage loading or the voltage disconnection through the feedback signals, and the voltage loading circuit loads the voltage to the PVC Gel unit.
As shown in FIG. 9, when the present device is not being excited by vibration, it can be placed in a third stable state, where the compliant mechanism has load bearing capacity. When the main beam is excited by vibration to generate displacement, the MFC piezoelectric sheet deforms along with the displacement, and therefore a voltage signal reflecting the displacement information of the main beam is sent to the electric control board. If the main beam has a downward displacement trend, the upper PVC Gel column body is electrified, and the lower PVC Gel column body is powered off; when the PVC Gel column is electrified, the polyvinyl chloride Gel film is adsorbed and filled into the mesh layer by the anode plate, the pores are filled, the thickness of the PVC Gel unit is reduced, the length of the PVC Gel column is reduced, when the PVC Gel column is powered off, the polyvinyl chloride Gel film is released from the mesh layer, the original thickness of the PVC Gel unit is recovered, and the length of the PVC Gel column is increased; the power-on length of the upper PVC Gel columnar body is reduced, the power-off length of the lower PVC Gel columnar body is increased, the distance between two ends of the supporting beam is reduced, the supporting beam becomes a bistable buckling beam, but the supporting beam only bends inwards due to the constraint force of the main beam, so that the main beam becomes the bistable buckling beam, the main beam has the tendency of becoming a second stable state, and the rigidity of the main beam near the third stable state is negative rigidity; if the main beam has an upward displacement trend from the second stable state, the upper PVC Gel column is powered off, so that the length is increased, the lower PVC Gel column is powered on, so that the length is reduced, the distance between two ends of the supporting beam is increased, the supporting beam 4 becomes a monostable straight beam, so that the main beam becomes a monostable straight beam, the main beam has a trend of becoming a third stable state, and the rigidity of the main beam 5 at a position near the upward direction of the second stable state is negative rigidity; similarly, if the main beam has an upward displacement trend in the third stable state, the upper PVC Gel column is electrified so that the length is reduced, the lower PVC Gel column is electrified so that the length is increased, the distance between two ends of the support beam is reduced, and the support beam becomes a bistable buckling beam. The stable state characteristic of the main beam can be controlled in real time according to the feedback signal of the MFC piezoelectric patch, so that the rigidity of the main beam in the vibration direction is reduced to zero rigidity or negative rigidity, the main beam actively deforms along with vibration without transmitting the vibration, and vibration isolation is realized.
The device has the advantages of novel and simple structure, reasonable design, higher performance stability as a new electroactive polymer material by taking the PVC Gel as the material, simple process and low cost, and the driving voltage is one tenth of that of a dielectric elastomer material. The PVC Gel column body is driven to generate small displacement, so that the device is stable and reliable, quick in response and low in energy consumption; the rigidity is adjusted through the change of the steady-state characteristics, so that the obvious adjustment of the rigidity by micro displacement is realized, and both flexible vibration isolation and rigid bearing are taken into consideration; and self-feedback control is realized by collecting the energy of the vibration deformation.
The foregoing embodiments may be modified in many different ways by those skilled in the art without departing from the spirit and scope of the invention, which is defined by the appended claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (6)
1. The utility model provides a little vibration isolation mounting of rigidity is become to self-feedback tristable based on PVC Gel which characterized in that includes: frame, compliance mechanism and vibration isolation mechanism, wherein: the vibration isolation mechanism circumferential array is arranged on the rack, and the compliant mechanism is connected with the vibration isolation mechanism;
the compliant mechanism comprises: corbel, girder and center block, wherein: the support beam circumferential array is arranged on the rack, two ends of the main beam are respectively connected with the support beams which are symmetrically arranged, the central block is fixedly connected with the middle part of the main beam, and the rigidity of the flexible mechanism is adjusted through micro displacement;
the vibration isolation mechanism comprises: the adjusting shaft and set up the PVC Gel unit that is used for absorbing little energy on the adjusting shaft, wherein: two ends of the adjusting shaft are respectively connected with the frame.
2. The apparatus of claim 1, wherein said frame comprises: connecting block, go up ring and installing support, wherein: the mounting bracket circumference array sets up on the go-between, and the connecting block links to each other with the one end of mounting bracket.
3. The device as claimed in claim 1, wherein the upper and lower sides of the main beam are provided with MFC piezoelectric sheets.
4. The device as claimed in claim 1, wherein the two ends of the corbel are bent vertically and have through holes.
5. The apparatus as claimed in claim 1, wherein the PVC Gel units are respectively formed into an upper PVC Gel column and a lower PVC Gel column, and the support beam has one end connected to the frame and the other end disposed between the upper PVC Gel column and the lower PVC Gel column.
6. The apparatus as claimed in claim 1 or 5, wherein the PVC Gel unit comprises: a cathode plate, a polyvinyl chloride gel film, a mesh layer and an anode plate which are connected from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810934916.2A CN109000114B (en) | 2018-08-16 | 2018-08-16 | Self-feedback tristable rigidity-variable micro-vibration isolation device based on PVC Gel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810934916.2A CN109000114B (en) | 2018-08-16 | 2018-08-16 | Self-feedback tristable rigidity-variable micro-vibration isolation device based on PVC Gel |
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| Publication Number | Publication Date |
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| CN109000114A CN109000114A (en) | 2018-12-14 |
| CN109000114B true CN109000114B (en) | 2020-02-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110578770B (en) * | 2019-09-23 | 2020-07-28 | 上海大学 | Electromagnetic-piezoelectric composite vibration control device based on synchronous switch damping technology |
| CN110544976B (en) * | 2019-09-23 | 2021-02-02 | 重庆大学 | Piezoelectric self-powered combined beam vibration damper and control method thereof |
| CN111692257B (en) * | 2020-06-17 | 2021-10-08 | 华中科技大学 | Extrusion film type self-tuning vibration absorber |
| CN113309784B (en) * | 2021-06-16 | 2022-04-05 | 西北工业大学 | Geometric nonlinear adjustable multi-stable-state device |
| CN113565922B (en) * | 2021-08-23 | 2022-06-10 | 北京理工大学 | Integrated quasi-zero stiffness vibration isolation buffering element and vibration isolation buffering assembly |
| CN114321260A (en) * | 2022-01-20 | 2022-04-12 | 中国矿业大学 | Electro-active quasi-zero stiffness vibration isolator |
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| JP2001102267A (en) * | 1999-09-29 | 2001-04-13 | Tokuyama Corp | Electric double-layer capacitor |
| JP2014074419A (en) * | 2012-10-02 | 2014-04-24 | Honda Motor Co Ltd | Valve device |
| CN105864350B (en) * | 2016-04-11 | 2018-01-30 | 华中科技大学 | A kind of beam array shape periodicity Piezoelectric anisotropy structural vibration reduction device and oscillation damping method |
| CN106949184B (en) * | 2017-04-07 | 2018-08-17 | 上海交通大学 | Inertia actuator Coupled Rigid-flexible micro-vibration isolation mounting |
| CN107654552B (en) * | 2017-08-31 | 2019-07-16 | 哈尔滨工程大学 | A kind of quasi-zero stiffness vibration isolators for carrying out adjusting neutrality using piezoelectric patches |
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