CN108092546B - A kind of large displacement piezoelectric actuator and actuation method based on bistable state beam - Google Patents
A kind of large displacement piezoelectric actuator and actuation method based on bistable state beam Download PDFInfo
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- CN108092546B CN108092546B CN201810028443.XA CN201810028443A CN108092546B CN 108092546 B CN108092546 B CN 108092546B CN 201810028443 A CN201810028443 A CN 201810028443A CN 108092546 B CN108092546 B CN 108092546B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/04—Constructional details
- H02N2/043—Mechanical transmission means, e.g. for stroke amplification
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Abstract
The invention discloses a kind of large displacement piezoelectric actuator and actuation method based on bistable state beam,The actuator piezoelectric pile one end is embedded into the groove on the inside of shell,The other end and spring are connected,Mass block on the spring other end and parallel connection type bistable state beam is connected,Parallel connection type bistable state beam both ends are affixed with shell upper and lower side respectively,Spring is in compressive state in advance,The original shape of bistable state beam is to curve inwardly,When being powered to piezoelectric pile,Spring continues to compress,The compression restoring force of spring is gradually increased,Make bistable state beam that bending deformation occur,It jumps to be bent outwardly,Generate larger output displacement,Spring is in tensional state at this time,When off voltage,Piezoelectric pile deformation restores,Spring continues to stretch,Bistable state beam generates reverse skip under the effect of spring elongation restoring force,Restore original shape,The output repeatedly of actuator displacement is realized with this；The configuration of the present invention is simple is compact, and occupancy is small in size, and power consumption is few, and output displacement is big, can be realized stable double action.
Description
Technical field
The present invention relates to piezoelectric actuator fields, and in particular to a kind of large displacement piezoelectric actuator based on bistable state beam and
The course of work.
Background technique
It is flat to small size, big stroke, high-precision actuation in technical fields such as minute vehicle, moonlet, intellectual weapons
Platform has an eager demand, piezoelectric actuator because its not by electromagnetic interference, energy density is big, Miniaturized the features such as become and solve
One of key technology of this demand.But due to the limitation of piezoelectric material self character, the piezoelectric actuator that is currently known in order to
The requirement for meeting larger displacement output needs enlarger outside plus or uses step-by-step movement actuation method, however additional puts
Great institutions make piezoelectric actuator structure become complicated, and have biggish external envelope size, are unfavorable for the micro- of piezoelectric actuator
Type, using step-by-step movement actuation to the actuation power supply of actuator with the presence of strict demand and its own actuation delay, friction
The problems such as fever.
Summary of the invention
In order to overcome the above-mentioned problems of the prior art, the purpose of the present invention is to provide a kind of based on bistable state beam
Large displacement piezoelectric actuator and actuation method, since the spy that buckling jumps can occur under certain Lateral Force for bistable state beam
Property, bistable state beam large deformation is converted by the micro-strain of piezoelectric pile, enables actuator under lesser voltage input, is exported
Biggish actuation displacement, this actuator configurations is simple and compact, and occupancy is small in size, and power consumption is few, and output displacement is big, can be realized
Stable double action.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of large displacement piezoelectric actuator based on bistable state beam, including shell 1, piezoelectric pile 2, spring 3, parallel connection type bistable
State beam 4 and mass block 5；Described 2 one end of piezoelectric pile is fixed in the square groove of shell 1 by interference fit, and piezoelectric pile 2 is another
End is pasted together with 3 one end of spring, and 3 other end of spring is pasted together with the mass block 5 on parallel connection type bistable state beam 4, and
4 both ends of connection type bistable state beam are separately fixed at the upper and lower ends of shell 1, and under original state, parallel connection type bistable state beam 4 is inwardly curved
It is bent.
1 middle line of shell, 2 middle line of piezoelectric pile, 3 middle line of spring and 4 midpoint of parallel connection type bistable state beam are on the same line；
The spring 3 is in compressive state in the initial state, and the rigidity of spring 3 meets in initial compression amount, and the elastic force of spring 3 is small
In the buckling threshold force of parallel connection type bistable state beam 4.
The original shape of the parallel connection type bistable state beam 4 isWherein h indicates parallel connection type bistable
The sagitta of state beam 4, L indicate the length of parallel connection type bistable state beam 4.
The mass block 5 ignores to the influence of crust deformation of parallel connection type bistable state beam 4.
2 other end of piezoelectric pile is closely pasted into 3 one end of spring using 7649 promotor of alite paste and 326 structure glues
Together, 3 other end of spring and the mass block 5 on parallel connection type bistable state beam 4 are tight using 7649 promotor of alite paste and 326 structure glues
It is close to be pasted together.
A kind of large displacement piezoelectric actuator based on bistable state beam, actuation method：When being not powered on, piezoelectric pile 2
In a state of nature, spring 3 and parallel connection type bistable state beam 4 are failure to actuate；It is jumped to make parallel connection type bistable state beam 4 that buckling occur, from
And mass block 5 is made to generate big displacement, the first step is powered to piezoelectric pile 2, the anamorphic stretching under inverse piezoelectric effect of piezoelectric pile 2, spring
3 are further compressed, when the compression restoring force of spring 3 is more than the Buckling Critical Load of parallel connection type bistable state beam 4, parallel connection type bistable
State beam 4 occurs buckling and jumps, and mass block 5 is driven to generate big displacement, at this point, spring 3 is become stretching state from squeezed state, because in parallel
Symmetric deformation occurs for type bistable state beam 4, so the buckling that the stretching restoring force of spring 3 is less than parallel connection type bistable state cosine beam 4 is faced
Boundary's load；Second step breaks and acts on voltage in piezoelectric pile 2, then piezoelectric pile 2 restores rapidly reset condition, and spring 3 is by into one
Step stretches, and the stretching restoring force of spring 3 is more than the Buckling Critical Load of parallel connection type bistable state beam 4, and parallel connection type bistable state beam 4 is again
Buckling occurs and jumps recovery to original state；The first and second step is repeated, actuator just can be realized stable double action.
Compared to the prior art, the invention has the advantages that：
1) present invention can produce larger displacement output on the basis of no additional displacement enlarger, and structure is simple, and volume is micro-
It is small, and fabricate and be easy, it is easy to assembly.
2) frictional dissipation is avoided without friction between each component of the present invention, it is high-efficient.
3) fast response time of the present invention, non-delay phenomenon.
Detailed description of the invention
Fig. 1 is a kind of structure principle chart of the large displacement piezoelectric actuator based on bistable state beam of the present invention.
Fig. 2 is a kind of working principle diagram of the large displacement piezoelectric actuator based on bistable state beam of the present invention, wherein：Fig. 2 a is
Off-position, Fig. 2 b are energized state.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, invention is further described in detail.
As shown in Figure 1, the present invention is a kind of large displacement piezoelectric actuator based on bistable state beam, including shell 1, piezoelectric pile
2, spring 3, parallel connection type bistable state beam 4 and mass block 5；The rectangular of shell 1 is fixed on by interference fit in described 2 one end of piezoelectric pile
In groove, 2 other end of piezoelectric pile is closely pasted together with 3 one end of spring using 7649 promotor of alite paste and 326 structure glues,
3 other end of spring is closely glued with the mass block 5 on parallel connection type bistable state beam 4 using 7649 promotor of alite paste and 326 structure glues
It sticking together, 4 both ends of parallel connection type bistable state beam are separately fixed at the upper and lower ends of shell 1, under original state, parallel connection type bistable state
Beam 4 curves inwardly.
1 middle line of shell, 2 middle line of piezoelectric pile, 3 middle line of spring and 4 midpoint of parallel connection type bistable state beam are on the same line；
The spring 3 is in compressive state in the initial state, and the rigidity of spring 3 meets in initial compression amount, and the elastic force of spring 3 is small
In the Buckling Critical Load of parallel connection type bistable state beam 4.
The original shape of the parallel connection type bistable state beam 4 isWherein h indicates in parallel
The sagitta of type bistable state beam 4, L indicate the length of parallel connection type bistable state beam 4.Deformation shadow of the mass block 5 to parallel connection type bistable state beam 4
Sound is ignored.
The actuation method of actuator of the present invention is described in detail below：
When being not powered on, as shown in Fig. 2 (a), in a state of nature, spring 3 and parallel connection type bistable state beam 4 are motionless for piezoelectric pile 2
Make；It is jumped to make parallel connection type bistable state beam 4 that buckling occur, so that mass block 5 be made to generate big displacement, the first step, such as Fig. 2 (b) institute
Show, be powered to piezoelectric pile 2, the anamorphic stretching under inverse piezoelectric effect of piezoelectric pile 2, spring 3 is further compressed, the compression of spring 3
When restoring force is more than the Buckling Critical Load of parallel connection type bistable state beam 4, parallel connection type bistable state beam 4 occurs buckling and jumps, band kinoplaszm
Gauge block 5 generates big displacement, at this point, spring 3 is become stretching state from squeezed state, because symmetric deformation occurs for parallel connection type bistable state beam 4,
So the stretching restoring force of spring 3 is slightly less than the Buckling Critical Load of parallel connection type bistable state cosine beam 4；Second step breaks effect
Voltage in piezoelectric pile 2, then piezoelectric pile 2 restores rapidly reset condition, and spring 3 is further stretched, and the stretching of spring 3 restores
Power is more than the Buckling Critical Load of parallel connection type bistable state beam 4, and buckling occurs for parallel connection type bistable state beam 4 jump to restore to initial again
State；The first and second step is repeated, actuator just can be realized stable double action.
Claims (4)
1. a kind of large displacement piezoelectric actuator based on bistable state beam, it is characterised in that：Including shell (1), piezoelectric pile (2), bullet
Spring (3), parallel connection type bistable state beam (4) and mass block (5)；Shell (1) is fixed on by interference fit in described piezoelectric pile (2) one end
Square groove in, piezoelectric pile (2) other end is pasted together with spring (3) one end, spring (3) other end and parallel connection type bistable
Mass block (5) on state beam (4) is pasted together, and parallel connection type bistable state beam (4) both ends are separately fixed at up and down the two of shell (1)
It holds, under original state, parallel connection type bistable state beam (4) curves inwardly；
Shell (1) middle line, piezoelectric pile (2) middle line, spring (3) middle line and parallel connection type bistable state beam (4) midpoint are the same as always
On line；The spring (3) is in compressive state in the initial state, and the rigidity of spring (3) meets the spring in initial compression amount
(3) elastic force is less than the buckling threshold force of parallel connection type bistable state beam (4).
2. a kind of large displacement piezoelectric actuator based on bistable state beam according to claim 1, it is characterised in that：It is described simultaneously
The original shape of connection type bistable state beam (4) isWherein h indicates the arch of parallel connection type bistable state beam (4)
Height, L indicate the length of parallel connection type bistable state beam (4)；Mass block (5) ignores not the influence of crust deformation of parallel connection type bistable state beam (4)
Meter.
3. a kind of large displacement piezoelectric actuator based on bistable state beam according to claim 1, it is characterised in that：The pressure
Pile (2) other end is closely pasted together with spring (3) one end using 7649 promotor of alite paste and 326 structure glues, spring
(3) other end and the mass block (5) on parallel connection type bistable state beam (4) are close using 7649 promotor of alite paste and 326 structure glues
It is pasted together.
4. a kind of actuation method of the large displacement piezoelectric actuator based on bistable state beam as described in claim 1, feature exist
In：When being not powered on, piezoelectric pile (2) in a state of nature, be failure to actuate by spring (3) and parallel connection type bistable state beam (4)；To make parallel connection type
Bistable state beam (4) occurs buckling and jumps, so that mass block (5) be made to generate big displacement, the first step is powered to piezoelectric pile (2), piezoelectricity
Heap (2) anamorphic stretching under inverse piezoelectric effect, spring (3) are further compressed, and the compression restoring force of spring (3) is more than parallel connection type
When the Buckling Critical Load of bistable state beam (4), parallel connection type bistable state beam (4) occurs buckling and jumps, and drives mass block (5) to generate big
Displacement, at this point, spring (3) is become stretching state from squeezed state, because symmetric deformation, bullet occur for parallel connection type bistable state beam (4)
The stretching restoring force of spring (3) is less than the Buckling Critical Load of parallel connection type bistable state beam (4)；Second step breaks and acts on piezoelectric pile
(2) voltage on, then piezoelectric pile (2) restores rapidly reset condition, and spring (3) is further stretched, and the stretching of spring (3) restores
Power is more than the Buckling Critical Load of parallel connection type bistable state beam (4), and buckling occurs again and jumps recovery extremely for parallel connection type bistable state beam (4)
Original state；The first and second step is repeated, actuator just can be realized stable double action.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810028443.XA CN108092546B (en) | 2018-01-11 | 2018-01-11 | A kind of large displacement piezoelectric actuator and actuation method based on bistable state beam |
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| CN201810028443.XA CN108092546B (en) | 2018-01-11 | 2018-01-11 | A kind of large displacement piezoelectric actuator and actuation method based on bistable state beam |
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| CN108092546A CN108092546A (en) | 2018-05-29 |
| CN108092546B true CN108092546B (en) | 2018-11-23 |
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| CN114194417B (en) * | 2021-03-30 | 2024-06-18 | 北京灵翼航宇科技有限公司 | Bidirectional driver adopting flexible steady-state structure |
| CN113078844B (en) * | 2021-04-21 | 2022-03-29 | 吉林大学 | Device and method for expanding inertia force to improve performance of piezoelectric actuator |
| CN113241291B (en) * | 2021-05-08 | 2022-08-30 | 安徽工业大学 | Bistable air switch with self-resetting function and self-resetting method |
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