Piezoelectric driver for improving performance based on four-foot coupling motion mode and control method

A technology of piezoelectric drive and coupling motion, which is applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., which can solve the problems of sensitive processing and assembly precision, instability, and low motion. state and other problems, to achieve the effect of simple processing, easy assembly and low noise

Active Publication Date: 2019-11-15
JILIN UNIV
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Problems solved by technology

[0003] However, the piezoelectric drive device based on the stick-slip motion method is sensitive to processing and assembly accuracy, and the low processing and assembly accura

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  • Piezoelectric driver for improving performance based on four-foot coupling motion mode and control method
  • Piezoelectric driver for improving performance based on four-foot coupling motion mode and control method
  • Piezoelectric driver for improving performance based on four-foot coupling motion mode and control method

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Embodiment Construction

[0021] The detailed content of the present invention and its specific implementation will be further described below in conjunction with the accompanying drawings.

[0022] see Figure 1 to Figure 4 As shown, the performance-improving piezoelectric actuator and control method based on the quadruped coupling motion of the present invention includes a base, a flexible mechanism, a piezoelectric element, a pre-tightening pad, and a rotor. The flexible mechanism, through its rotationally symmetrically distributed driving feet, cooperates with the piezoelectric element to generate micron-scale motion to drive the rotor to rotate; the piezoelectric element converts electrical energy into kinetic energy based on the inverse piezoelectric effect, and drives the flexible mechanism to move; Tighten the screw to adjust the friction force between the driving foot and the rotor to an appropriate size; the rotor is used as the output terminal of the driving device. The invention has the ad...

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Abstract

The invention relates to a piezoelectric driver for improving the performance based on a four-foot coupling motion mode and a control method, and belongs to the field of precision machinery. The piezoelectric driver comprises a base, a flexible mechanism, a piezoelectric element, a pre-tightening cushion block and a rotor, wherein the flexible mechanism is matched with the piezoelectric element togenerate micron-scale motion to drive the rotor to rotate through the driving feet which are rotationally and symmetrically distributed; the piezoelectric element converts electric energy into kinetic energy based on an inverse piezoelectric effect and drives the flexible mechanism to act; the pre-tightening cushion block is used for matching with a pre-tightening screw to adjust the friction force between the driving feet and the rotor; and the rotor serves as an output terminal of the driving device. The piezoelectric driver has the advantage of high rotation angle resolution, stable motion, quick response, high rotation speed and the like, and has the characteristics of no electromagnetic interference, compact structure, light weight, simple processing, simple and convenient assembly,low cost, low power consumption and low noise. The piezoelectric driver is wide in application range and has good application prospect in the fields of precision instruments, precision optics, aerospace, micromanipulation and the like.

Description

technical field [0001] The invention relates to the field of precision machinery, in particular to a piezoelectric driver and a control method for improving performance based on quadruped coupling motion. It can be used in micromanipulation, medical engineering, precision instruments and other fields. Background technique [0002] Piezoelectric drive technology is a precision drive technology based on the inverse piezoelectric effect of piezoelectric materials. In theory, it has infinite displacement resolution, but in practice it is limited by power supply resolution and sensor resolution in closed-loop control. Since the displacement output produced by the inverse piezoelectric effect is extremely small, which is about one-thousandth of the length of the piezoelectric material itself, some step-by-step motion methods have been proposed to amplify the stroke of the piezoelectric actuator. Currently, there are mainly three step-by-step motion methods for piezoelectric actua...

Claims

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Application Information

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IPC IPC(8): H02N2/12
CPCH02N2/12
Inventor 赵宏伟王吉如秦峰王赵鑫常枭
Owner JILIN UNIV
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