Piezoelectric driving-based crawling actuator and working method thereof

Abstract

The present invention discloses a piezoelectric driving-based crawling actuator and a working method thereof, and relates to the ultrasonic, MEMS and piezoelectric technology fields. According to thepresent invention, the actuator can simultaneously satisfy the characteristics of being small in size, fast in reaction speed and large in load, and being able to turn. The piezoelectric driving-basedcrawling actuator of the present invention comprises a first phosphor bronze matrix, a first piezoelectric ceramic piece, a second phosphor bronze matrix, a second piezoelectric ceramic piece and a connecting rod. By utilizing the inverse piezoelectric effects of the two piezoelectric ceramic pieces under the effect of a sinusoidal voltage respectively, and the 60-degree included angles formed bycontacting the respective two edges of the two feet of the matrixes with the ground, the two edges of the two feet generate the different vibration displacements under the driving of the piezoelectric ceramics, and the two feet of the matrixes generate the motion modes towards a same direction. By controlling and adjusting the input sinusoidal voltage values of the two feet, the different turningradiuses of the actuator are realized, and the preset advancing paths are finished.

Description

technical field [0001] The invention relates to the technical fields of ultrasound, MEMS and piezoelectricity, in particular to a creeping actuator driven by piezoelectricity and a working method thereof. Background technique [0002] Actuator is a key component to implement active vibration control and an important part of active control system. The role of the actuator is to exert control force on the control object according to the determined control law. In recent years, on the basis of traditional fluid actuators, gas actuators and electrical actuators, many intelligent actuators have been researched and developed, such as piezoelectric ceramic actuators, piezoelectric film actuators, Electrostrictive actuators, magnetostrictive actuators, shape memory alloy actuators, servo actuators and electrorheological fluid actuators, etc. The emergence of these actuators provides the necessary conditions for the realization of high-precision active vibration control. [0003] ...

AI Technical Summary

Problems solved by technology

However, in the existing actuators, the small size is difficult to meet the demand for large loads; the fast response speed is difficult to integrate into a smaller size

Therefore, it is difficult to balance the performance of various parameters in the design of existing actuators, and there is a lack of an actuator that can satisfy the characteristics of small size, fast response speed, turning motion, and large load at the same time.

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