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Piezoelectric actuator and control method to improve performance based on quadruped coupling motion

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

Active Publication Date: 2022-03-29
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 accuracy will cause the instability of the motion state
Therefore, there is a contradiction between the performance of the piezoelectric actuator and the cost of processing and assembly

Method used

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  • Piezoelectric actuator and control method to improve performance based on quadruped coupling motion
  • Piezoelectric actuator and control method to improve performance based on quadruped coupling motion
  • Piezoelectric actuator and control method to improve performance based on quadruped coupling motion

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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 and a control method for improving performance based on quadruped coupling motion, and belongs to the field of precision machinery. It includes a base, a flexible mechanism, a piezoelectric element, a pre-tension 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; the pre-tightening block is used to cooperate with the pre-load Tighten the screw to adjust the friction force between the driving foot and the rotor; the rotor is used as the output terminal of the driving device. It has the advantages of high corner resolution, smooth motion, quick response, fast speed, etc., and has the characteristics of no electromagnetic interference, compact structure, light weight, simple processing, easy assembly, low cost, low power consumption, and low noise. It has a wide range of applications and has good application prospects in the fields of precision instruments, precision optics, aerospace and micromanipulation.

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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Patent Type & Authority Patents(China)
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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