CN103486194B - Efficient driven vibration insulation and reduction platform imitating physiological structure of head of woodpecker - Google Patents
Efficient driven vibration insulation and reduction platform imitating physiological structure of head of woodpecker Download PDFInfo
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- CN103486194B CN103486194B CN201310462041.8A CN201310462041A CN103486194B CN 103486194 B CN103486194 B CN 103486194B CN 201310462041 A CN201310462041 A CN 201310462041A CN 103486194 B CN103486194 B CN 103486194B
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- 241000287509 Piciformes Species 0.000 title claims abstract description 42
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Abstract
The invention discloses an efficient driven vibration insulation and reduction platform imitating the physiological structure of the head of a woodpecker. The efficient driven vibration insulation and reduction platform comprises a driven vibration-reduction assembly, a variable-stiffness various-damping air spring assembly, a combination bearing platform and an outer frame, the driven vibration-reduction assembly comprises a hard rubber pad and a cutting type viscoelastic damper, the variable-stiffness various-damping air spring assembly comprises two or more than two double-air-chamber air springs which are symmetrically distributed along a machine base, the combination bearing platform comprises a top board, a bottom board and side boards, wherein the top board, the bottom board and the side boards are made of steel boards, insulation layers are arranged among the top board, the bottom board and the side boards, and the outer frame is symmetrically arranged on two sides of the machine base. The efficient driven vibration insulation and reduction platform imitating the physiological structure of the head of the woodpecker has no acting part and is low in energy consumption. Compared with a vibration-reduction platform under driving control, the efficient driven vibration insulation and reduction platform can greatly lower manufacturing cost and operation cost, save energy, and be economical and practical.
Description
Technical field
The present invention relates to vibration control technology and bionics techniques field, particularly relate to the efficiently passive every vibration reduction platform of a kind of imitative woodpecker head physiological structure.
Background technique
In recent years, due to the continuous progress of technology and industry, high-speed rotating machine, electronic equipment, efficient high-accuracy processing and the contour exquisite system of micromechanics reach extremely harsh degree to the requirement every vibration insulating system.Various ambient vibration, mechanical shock become the key factor that all kinds of high-accuracy system of restriction improves machining accuracy or operating accuracy.Be still using pneumatic spring as the passive of main vibration isolation element or half initiatively every vibration insulating system at present in exquisite system, what this single vibration isolation element formed cannot meet the demand of high-quality precision and sophisticated technology equipment to isolating technique technology every vibration insulating system.In order to improve the vibration isolation efficiency every vibration insulating system, scientific research and engineers and technicians also develop some every vibration insulating system.
The paper " micro-manufacturing platform vibrating isolation system Bionic Design " that " China Mechanical Engineering " the 17th volume the 21st periodical in 2006 carries, imitate woodpecker head construction and devise a kind of vibration-isolating platform based on active control technology, be made up of 1 platform, 4 pneumatic springs, 8 ultra-magnetic deformation actuators, 6 servo type sensors, 3 levelling valves, 1 cover control system.This device using ultra-magnetic deformation actuator as active vibration isolation element, and forms closed loop Active Vibration Control System together with detection system, and power is disturbed in the vibration effectively can eliminating the various frequencies passed over by basis.But the active vibration isolation system that this file provides comprises platform, pneumatic spring, ultra-magnetic deformation actuator, servo type sensor, levelling valve, control system etc., structure relative complex, and actuator, sensor operation all require the expenditure of energy.Disclosed in Harbin Institute of Technology 2010, one section of Master of engineering academic dissertation " development based on MR damper vibration reduction platform " describes a kind of half active damping platform based on MR damper, is made up of AC servo motor, MR damper, electric-controlled parts, frame etc.The main purpose of this paper is validity and the control effects of the magnetic rheology effect control algorithm in order to verify exploitation.As a kind of active based on intelligent damping material or half active damping platform, corresponding electric controller must be designed during practical application, complex structure, costly.
A kind of precision damping component described by patent CN100573341C and the vibration reduction platform be made up of it, by the one half active damping platform formed in parallel with active damping actuator for passive damping assembly, there is vibration damping and locating function, although this structure achieves the effective suppression to wide frequency domain vibration, but the complex structure of active damping actuator in device, energy ezpenditure is also larger.It is specially vibration reduction platform that precision optical system designs that patent CN102621064A discloses a kind of, comprise removable table top and the drive system for driving removable table top to move, in composition structure, there is ACTIVE CONTROL damper unit, make body vibration amount less, the 0.005mm order of magnitude can be reached.Therefore this vibration reduction platform belongs to ACTIVE CONTROL field and application is confined to precise control system, is difficult in other various application in machine equipments.
As fully visible, the high-accuracy system developed at present all adopts based on the active of active damping controls technology or semi-active vibration control technology every vibration reduction platform, the actuator of design active damping element, controller and control algorithm is needed in device, not only complex structure, and costly, cycle is long, the relative passive vibration control technical difficulty of Installation and Debugging.A kind ofly wide future in engineering applications will be had based on Passive Control technology every vibration reduction platform if therefore can develop.This case designer is exactly as target, use for reference early stage to the research of woodpecker head physiological structure every damping mechanism, in practical implementation occasion, shock absorber part and damping requirements carried out integration consideration and carry out Optimized Matching, based on Passive Control technology, utilize the relative movement between cerebrospinal fluid and brain in shearing type viscoelastic damper simulation woodpecker skull, construct one on this basis efficiently passive every vibration reduction platform, and applying vibration basic theory, nonlinear dampling theory and this platform non-linear rigidity of biomechanics designing and calculating, the excursion of damping, and to the efficient quality every vibration reduction platform, damping and rigidity are optimized coupling, realize the object suppressing low-frequency vibration and the vibration of isolation medium-high frequency, meet high-precision equipment to the requirement every vibration insulating system.
Summary of the invention
For solving the deficiency that prior art exists, the present invention, by using for reference early stage to the observation of woodpecker head physiological structure and the research of vibration isolation mechanism, provides a kind of one utilizing the components such as vulcanite pad, shearing type viscoelastic damper, cellular sandwich and two air chamber pneumatic springs to be formed to imitate woodpecker head physiological structure efficiently passive every vibration reduction platform.This platform have carrying and every damping effect, effectively can isolate various environment wide frequency domain stochastic vibration to the impact of load bearing equipment (as micro mechanical system, ultra-precision processing system), improve the operating accuracy of load bearing equipment, also can effectively reduce the medium-high frequency vibration that load bearing equipment (as high-speed rotating machine, high speed or High Speed machining system) produces or the impact impacted environment.
For achieving the above object, concrete scheme of the present invention is as follows:
A kind of imitative woodpecker head physiological structure efficiently passive every vibration reduction platform, comprise passive damping assembly, variation rigidity mutative damp air spring assembly, combination bearing table and external frame, described passive damping assembly comprises vulcanite pad and shearing type viscoelastic damper, described variation rigidity mutative damp air spring assembly comprises more than 2 or 2 along the symmetrical two air chamber pneumatic springs of support, described combination bearing table comprises the top board that steel plate is made, base plate and side plate, top board, separation layer is provided with between base plate and side plate, described external frame symmetry is arranged on support both sides.
Described shearing type viscoelastic damper makes external frame and combination bearing table form the shearing type viscoelastic damper of three-decker by visco-elastic damping material by splicing or bolt.
Described visco-elastic damping material is arranged between external frame and combination bearing table by splicing or bolt.
Described vulcanite pad is installed between environmental basis and support.
Described steel plate be rigidity large, be out of shape little quality steel plate.
Described external frame is fixed on support by clamping bolt, is also provided with pad between bolt and support.
Described separation layer is the separation layer having cellular sandwich to make.
The shape of described support matches with actual environment space, for circular or square.
The shape of described combination bearing table matches with the object that is isolated of use, for circular or square.
Described pair of air chamber pneumatic spring comprises main gas tank and auxiliary tank, main gas tank, auxiliary tank are separately installed with rubber main gasbag and rubber auxiliary balloon, the airtight formation pressure chamber of rubber auxiliary balloon of auxiliary tank, has the flow channel of damping hole as air between main gas tank and auxiliary tank between main gas tank and auxiliary tank.
Described shearing type viscoelastic damper has the characteristic of elastic spacer and viscous fluid concurrently, has the fluid shearing effect imitated between woodpecker head skull-cerebrospinal fluid-brain.
Support can be circular or square according to actual environment spatial design, and combination bearing table can be designed to circular or square according to the usage requirement being isolated object, the structure of vulcanite pad and external frame also will do corresponding adjustment simultaneously.
Be the one combination bearing table be made up of the large high-quality structural steel of rigidity and cellular sandwich for carrying the platform being isolated object, there is carrying and the effect of vibration damping.The large high-quality structural steel of rigidity is for simulating the hard beak of woodpecker head, and cellular sandwich is for imitating the spongy cartilage bottom beak, i.e. cancellous bone.
The present invention utilizes shearing type viscoelastic damping to simulate the fluid flow function of woodpecker head cerebrospinal fluid, the beak that the high-quality structural steel simulation woodpecker utilizing rigidity large is hard, utilize the spongy cartilage bottom cellular sandwich simulation beak, and interpolation have two air chamber pneumatic springs of variation rigidity mutative damp function to simulate the soft tissue such as muscle, cartilage of woodpecker head in composition structure.This thinking adopts passive damping assembly, variation rigidity mutative damp air spring assembly, component such as combination bearing table and external frame etc. are optimized matched design and define the efficiently passive every vibration reduction platform of a kind of imitative woodpecker head physiological structure.The superior energy dissipation behavior of this attenuation vibration performance efficiently utilizing pneumatic spring superior every vibration reduction platform, viscoelastic damping is optimized coupling to realize efficient vibration shock isolation performance.
Beneficial effect of the present invention: provided by the invention a kind of copy woodpecker head physiological structure efficiently passive be the physiological structure feature using for reference woodpecker head every vibration reduction platform, take into full account having designed every damping requirements of practical implementation occasion, concrete beneficial effect is as follows simultaneously:
1. use for reference woodpecker head construction, utilize vibrational theory and nonlinear dampling theoretical and in conjunction with Optimization Theory, the function module design calculation optimization such as " shearing type " viscoelastic damping, variation rigidity mutative damp air spring assembly, combination bearing table mated, form the efficiently passive every vibration reduction platform of imitative woodpecker head physiological structure, it is all Passive Control element every damping element, not only compact to design, structure is simple, reliable, and not consumed energy.Largely overcome passing complex structure, the drawback that needs power consumption brought due to the existence of active vibration isolation element every vibration reduction platform.
2. the efficiently passive of imitative woodpecker head physiological structure uses bionics and fluid dynamic theory design every vibration reduction platform, not only there is two air chamber air spring constructions, but also there is " shearing type " Viscoelastic Damped Structures, therefore have the large carrying of pneumatic spring and the energy dissipation behavior of viscoelastic damping concurrently, the Optimized Matching of " shearing type " viscoelastic damper and air spring constructions can make to increase substantially compared with in the existing vibration reduction platform be made up of single vibration isolation element every the damping efficiency of vibration reduction platform.
3. combinationally using of shearing type viscoelastic damper and two air chamber pneumatic spring makes of the present inventionly have two large clear superiorities every vibration reduction platform: low resistance when high damping when being system low frequency and high frequency, can effectively suppress low-frequency resonant can isolate again medium-high frequency vibration, the frequency range be therefore suitable for is more extensive simultaneously; High rigidity during the two large carryings of Low rigidity when being little carryings, " meet strong then strong, meet soft then soft ", be therefore suitable for magnitude of load is more extensive.
4. imitate woodpecker head sponge-like cancellous bone structure and the combination bearing table of cellular composite material that formed, effectively can reduce the rigidity of combination bearing table, and greatly improve damping value, can the vibration of effective attenuation medium-high frequency.
5. imitative woodpecker head physiological structure is efficiently passive every the type and size of vibration reduction platform for different external load, bionics and fluid dynamic theory is used to design, comprise the material of " shearing type " damping, thickness and width, the main and auxiliary parameter such as air pressure, flow, flow velocity helping air chamber of pneumatic spring, when each parameter designing is proper, its body vibration amount can be made when structural member Intensity Design meets the demands less, can micron order be reached, can provide preferably every vibration damping environment for electronic equipment, high-accuracy processing, high-speed rotating machine, MEMS system etc.
6. imitative woodpecker head physiological structure of the present invention efficiently passive without activation part every vibration reduction platform, consumes energy low, relative to the vibration reduction platform having ACTIVE CONTROL, can significantly reduce manufacture cost and operating cost, energy-conservation, economical and practical.
Accompanying drawing explanation
Fig. 1 woodpecker head physiological structure schematic diagram;
Fig. 2 overall structure schematic diagram of the present invention;
Bearing table structural representation is combined in Fig. 3 the present invention;
In Fig. 4 (a) the present invention, two air chamber pneumatic spring (to install 4) distribute rectangular layout schematic diagram symmetrically;
In Fig. 4 (b) the present invention, two air chamber pneumatic spring (to install 4) distribute rhombus layout schematic diagram symmetrically;
Fig. 5 specific embodiment of the invention structural representation;
In figure, 1 environmental basis, 2 vulcanite pads, 3 supports, 4 clamping bolts, 5 pads, 6 external frames, 7 visco-elastic damping materials, 8 side plates, 9 top boards, 10 cellular composite materials, 11 base plates, 12 main gasbags, 13 main gas tank 14 damping holes, 15 auxiliary tanks, 16 auxiliary balloon, 17 variation rigidity mutative damp air spring assemblies, 18 combination bearing tables, 19MEMS system, 20 beaks, 21 cancellous bones, 22 soft tissues, 23 cerebrospinal fluid, 24 brains.
Embodiment:
Below in conjunction with accompanying drawing, the present invention is described in detail:
As shown in Figure 1, the present invention designs by using for reference the physiological structure with the woodpecker head of extreme shock erosion-resisting characteristics, the physiological structure of woodpecker head is: 200 points, the beak of woodpecker is firm, and the position length that the bottom of beak 20 is connected with head has the spongy cartilage of one deck, be referred to as cancellous bone 21, vibrational energy beak 20 being passed to brain 24 does well preliminary alleviation.Around brain 24, have the continuous shape bone of one deck, containing liquids, is referred to as cerebrospinal fluid 23, and the shearing action of fluid flowing reduces greatly to be pecked 20 impact forces when hitting and be delivered to brain 24, can play cushion and weakening effect external force.In addition, also overgrow with the muscle with damping effect and soft tissue 22 around its skull, can beak point and head being remained point-blank, making woodpecker head when pecking wood strictly carry out straight line motion.
As Figure 2-3, a kind of imitative woodpecker head physiological structure efficiently passive every vibration reduction platform, comprise passive damping assembly, variation rigidity mutative damp air spring assembly, combination bearing table 18 and external frame 6, described passive damping assembly comprises vulcanite pad 2 and shearing type viscoelastic damper, described variation rigidity mutative damp air spring assembly 17 comprises more than 2 or 2 along the symmetrical two air chamber pneumatic springs of support, described combination bearing table 18 comprises the top board 9 that steel plate is made, base plate 11 and side plate 8, top board 9, separation layer is provided with between base plate 11 and side plate 8, described external frame 6 symmetry is arranged on support both sides.
Shearing type viscoelastic damper is make external frame 6 and combination bearing table 18 form the shearing type viscoelastic damper of three-decker by visco-elastic damping material by splicing or bolt.Visco-elastic damping material 7 is arranged between external frame 6 and combination bearing table 18.Vulcanite pad 2 is installed between environmental basis 1 and support 3.Steel plate be rigidity large, be out of shape little quality steel plate, external frame 6 is fixed on support 3 by clamping bolt 4, is also provided with pad 5 between clamping bolt 4 and support 3.Separation layer is the separation layer having cellular sandwich 10 to make.The shape of support 3 matches with actual environment space, for circular or square.The combination shape of bearing table 18 matches with the object that is isolated of use, for circular or square.
Described pair of air chamber pneumatic spring comprises main gas tank 13 and auxiliary tank 15, main gas tank 13, auxiliary tank 15 are separately installed with rubber main gasbag 12 and rubber auxiliary balloon 16, the airtight formation pressure chamber of rubber auxiliary balloon 16 of auxiliary tank 15, has the flow channel of damping hole 14 as air between main gas tank 13 and auxiliary tank 15 between main gas tank 13 and auxiliary tank 15.
Described shearing type viscoelastic damper has the characteristic of elastic spacer and viscous fluid concurrently, has the fluid shearing effect imitated between woodpecker head skull-cerebrospinal fluid 23-brain 24.
Several pair of air chamber pneumatic spring forms symplex structure, general employing more than 2 or 2, and to be placed between support 3 and combination bearing table 18 and center of gravity along support 3 is symmetrical, therefore can reduce the vibration that to bend when combination bearing table 18 is subject to asymmetrically distributed excitation.Wherein when being subject to External Force Acting, air flows in the main gas tank 13 and auxiliary tank 15 of pneumatic spring by damping hole 14, and rigidity and the damping of pneumatic spring change thereupon, thus consumes vibrational energy, reaches the object of attenuation vibration.In addition, variation rigidity mutative damp air spring assembly 17 along with the size adjustment stiffness by itself of external load, can have certain self adaption, self-regulating function, " meet strong then strong, meet weak then weak ", the magnitude of load that is suitable for more extensive.
As Fig. 4 (a)-Fig. 4 (b) is depicted as 4 two air chamber pneumatic springs along two kinds of distribution mode structural representations of base center of gravity, be respectively as rectangular arrangement and rhombus arrangement.
Combinationally using of the shearing type viscoelastic damper of two air chamber pneumatic spring 17 and the three-decker be made up of external frame 6, visco-elastic damping material 7 and the side plate 8 that combines bearing table 18, larger vertical support force and lower vertical stiffness can be obtained, and the variation rigidity mutative damp air spring assembly 17 to be made up of more than 2 or 2 two air chamber pneumatic springs is arranged between support 3 and combination bearing table 18, mutual collaborative work, the vibration in the wider frequency that can decay territory.Because therefore larger vertical support force also can resist large impact vibration.And the damping value of shearing type viscoelastic damper reduces with the rising of energizing frequency, therefore low resistance when high damping and high frequency during feasible system low frequency, medium-high frequency vibration can be isolated again while effectively can suppressing low-frequency resonant, greatly overcome the ubiquitous low-frequency resonant of present stage common passive vibration control technology and to suppress and dither isolates the shortcoming that cannot take into account.
As shown in Figure 5, be the specific embodiment of the present invention in MEMS system, MEMS system 19 is installed on combination bearing table 18, and four two air chamber pneumatic springs adopt square arrangement mode support combinations bearing table 18.The quantity of two air chamber pneumatic spring can design according to actual needs.
The present invention refer in particular to a kind of copy woodpecker head physiological structure and design for vibration damping, anti-impact efficiently passive every vibration reduction platform, being particularly useful for exquisite system and the electronic equipments etc. such as high-accuracy processing, high-speed rotating machine, micromechanics has higher in the equipment of damping requirements, especially centering dither, impact have good in effectiveness in vibration suppression.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technological scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (9)
1. an imitative woodpecker head physiological structure is efficiently passive every vibration reduction platform, it is characterized in that, comprise passive damping assembly, variation rigidity mutative damp air spring assembly, combination bearing table and external frame, described passive damping assembly comprises vulcanite pad and shearing type viscoelastic damper, described variation rigidity mutative damp air spring assembly comprises more than 2 or 2 along the symmetrical two air chamber pneumatic springs of support, described combination bearing table comprises the top board that steel plate is made, base plate and side plate, top board, separation layer is provided with between base plate and side plate, described external frame symmetry is arranged on support both sides.
2. a kind of imitative woodpecker head physiological structure as claimed in claim 1 is efficiently passive every vibration reduction platform, it is characterized in that, described shearing type viscoelastic damper makes external frame and combination bearing table form the shearing type viscoelastic damper of three-decker by visco-elastic damping material by splicing or bolt.
3. a kind of imitative woodpecker head physiological structure as claimed in claim 2 is efficiently passive every vibration reduction platform, it is characterized in that, described visco-elastic damping material is arranged between external frame and combination bearing table.
4. a kind of imitative woodpecker head physiological structure as claimed in claim 1 is efficiently passive every vibration reduction platform, and it is characterized in that, described vulcanite pad is installed between environmental basis and support.
5. a kind of imitative woodpecker head physiological structure as claimed in claim 1 is efficiently passive every vibration reduction platform, and it is characterized in that, described external frame is fixed on support by clamping bolt, is also provided with pad between bolt and support.
6. a kind of imitative woodpecker head physiological structure as claimed in claim 1 is efficiently passive every vibration reduction platform, and it is characterized in that, described separation layer is the separation layer having cellular sandwich to make.
7. a kind of imitative woodpecker head physiological structure as claimed in claim 1 is efficiently passive every vibration reduction platform, and it is characterized in that, the shape of described support matches with actual environment space, for circular or square.
8. a kind of imitative woodpecker head physiological structure as claimed in claim 1 is efficiently passive every vibration reduction platform, and it is characterized in that, the shape of described combination bearing table matches with the object that is isolated of use, for circular or square.
9. a kind of imitative woodpecker head physiological structure as claimed in claim 1 is efficiently passive every vibration reduction platform, it is characterized in that, described pair of air chamber pneumatic spring comprises main gas tank and auxiliary tank, main gas tank, auxiliary tank are separately installed with rubber main gasbag and rubber auxiliary balloon, the airtight formation pressure chamber of rubber auxiliary balloon of auxiliary tank, has the flow channel of damping hole as air between main gas tank and auxiliary tank between main gas tank and auxiliary tank.
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| CN105832164A (en) * | 2016-05-29 | 2016-08-10 | 合肥华普生物科技有限公司 | Damping supporting device for water dispenser |
| CN106122333B (en) * | 2016-06-23 | 2017-12-01 | 山东大学 | Concrete drill hole damping device and application method |
| CN108032567A (en) * | 2017-12-30 | 2018-05-15 | 中国科学院沈阳自动化研究所 | A kind of shock resistance structure on imitative woodpecker head and preparation method thereof |
| CN112253686B (en) * | 2019-08-21 | 2022-05-17 | 浙江厚达智能科技股份有限公司 | Anti-loose traditional Chinese medicine equipment mounting seat |
| CN111810581B (en) * | 2020-05-27 | 2021-05-07 | 厦门大学 | Large-scale precision vibration isolation platform based on air spring |
| CN112943843A (en) * | 2021-02-23 | 2021-06-11 | 常州大学 | Bionic vibration isolation system |
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| EP0767320A2 (en) * | 1995-10-04 | 1997-04-09 | Ebara Corporation | Vibration damping apparatus |
| US5876012A (en) * | 1996-06-21 | 1999-03-02 | Ebara Corporation | Vibration cancellation apparatus |
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