Actuator and method for achieving torque through piezoelectric-link mechanisms

A linkage mechanism and actuator technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problem of small output maximum angle, large range, and force Large and other problems, to achieve the effect of low energy consumption and light weight

Active Publication Date: 2014-07-02
XI AN JIAOTONG UNIV
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Problems solved by technology

Due to its small maximum output angle and large force, this structure is mostly suitable for vibration reduction of aerospace structures; while it is required to have anti-elect...

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  • Actuator and method for achieving torque through piezoelectric-link mechanisms

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] As shown in the drawings, the present invention is an actuator that realizes torque through a piezoelectric-linkage mechanism. A plurality of piezoelectric-linkage mechanisms 5 that form a certain angle act on the eccentric position of the actuating disk 7. The two pins at 6 places pull the continuous rotation of the actuating disk 7 through the reciprocating telescopic motion of each piezoelectric-linkage mechanism 5 . The controller 8 outputs the control signal and sends it to the driver 9, and the driver 9 sends the driving signal to different piezoelectric-linkage mechanisms 5. The driving signal is sent to the piezoelectric stack 2 in the piezoelectric-link mechanism 5, and the piezoelectric stack 2 periodically expands and contracts after receiving the driving signal, and acts on the pin through the piezoelectric constrai...

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Abstract

The invention provides an actuator and method for achieving the torque through piezoelectric-link mechanisms. The actuator is composed of the piezoelectric-link mechanisms, pins, actuating discs, a driver and a controller. The method includes the following steps of firstly, amplifying miniature linear displacement outputted by piezoelectric materials through piezoelectric constraint-multi-stage displacement amplifying mechanisms and then outputting the displacement, wherein the piezoelectric-link mechanisms are composed of piezoelectric stacks and the piezoelectric constraint-multi-stage displacement amplifying mechanisms; secondly, exerting pulling force and linear displacement on the pins located on the actuating discs through the piezoelectric-link mechanisms, wherein a certain distance exists between each pin and the circle center of the corresponding actuating disc so that force and linear displacement outputted by the piezoelectric materials can be converted into torque output and continuous rotation of the actuating discs; thirdly, exerting different magnitudes of pulling force or lost motion on the pins at different phase positions where the different numbers of piezoelectric-link mechanisms rotate so that it can be ensured that the actuator stably outputs the torque. The actuator and method have the advantages of being large in output torque, small in energy consumption, free of phase intervals, capable of conducting multi-circle continuous actuation, high in timeliness and the like.

Description

technical field [0001] The invention relates to the technical field of actuation, in particular to an actuator and a method for realizing torque through a piezoelectric-link mechanism. Background technique [0002] Actuators based on piezoelectric materials have the advantages of high output displacement resolution, large output force, fast response, low power consumption, and small size. accomplish. Therefore, various actuators based on piezoelectric stacks have been widely used in the fields of machinery, electric power, and aerospace engineering, and have become one of the most promising intelligent drive devices. Due to the small output displacement of the piezoelectric stack, the current actuators made of the piezoelectric stack mostly improve the performance of the actuator through reasonable structural design. [0003] Most of the existing torque actuators based on piezoelectric materials are lever structures, that is, the piezoelectric stack acts on one end of the ...

Claims

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Application Information

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IPC IPC(8): H02N2/10H02N2/12H02N2/14
Inventor 张舒文徐明龙邵恕宝朱建阳苗维凯安增勇
Owner XI AN JIAOTONG UNIV
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