Auxiliary supercharged piezoelectric stick-slip linear motor and excitation method thereof

Abstract

The invention, which belongs to the technical field of precision engineering, relates to an auxiliary supercharged piezoelectric stick-slip linear motor and an excitation method thereof. The auxiliarysupercharged piezoelectric stick-slip linear motor is composed of a fixed base, a moving platform, a stator assembly and a mover assembly. The fixed base and the stator assembly are connected by screws; the fixed base and the mover assembly are connected by screws; the moving platform and the mover assembly are connected by screws; and the stator assembly and the mover assembly are in contact cooperation. In addition, according to the excitation method, an auxiliary supercharged stator is excited; the friction driving force between the auxiliary supercharged stator and a mobile rail is increased and the frictional resistance between the auxiliary supercharged stator and the mobile rail is reduced; the friction force during the whole working process of the piezoelectric stick-slip linear motor is controlled; the output characteristic of the piezoelectric stick-slip linear motor is improved obviously; and the displacement back-off rate is reduced. The auxiliary supercharged piezoelectric stick-slip linear motor has advantages of simple structure, high precision and fast response speed. The auxiliary supercharged piezoelectric stick-slip linear motor and the excitation method thereofhave the broad application prospects in fields of precision engineering technology and the like.

Description

technical field [0001] The invention relates to the technical field of precision engineering, in particular to an auxiliary booster piezoelectric stick-slip linear motor and an excitation method thereof. Background technique [0002] Piezoelectric stick-slip linear motor is a kind of inverse piezoelectric effect based on piezoelectric elements, which excites the stator (or vibrator) under the excitation of asymmetrical electric signals to produce small-amplitude high-frequency vibration, which is realized by the friction coupling between the stator and the mover. A micro-nano precision piezoelectric stick-slip linear motor with mechanical energy output. According to different driving principles, piezoelectric stick-slip linear motors are mainly divided into two categories: resonant piezoelectric motors (also called ultrasonic motors) and non-resonant piezoelectric motors (also called piezoelectric stick-slip motors). Compared with the resonant piezoelectric motor, the piezo...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an auxiliary pressurized piezoelectric stick-slip linear motor and its excitation method, which solves the technical problems in the prior art such as serious displacement retreat and unstable motion output.

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