A Symmetrical Biped Drive Non-resonant Piezoelectric Linear Motor

Abstract

The invention discloses a non-resonant piezoelectric linear motor driven by symmetrical bipeds, which comprises a stator and its casing, a mover guide rail, a guide adjustment mechanism, a pre-pressure device and a base; the stator is fixedly connected in the casing to form a whole , the front end of the shell is provided with a mover guide rail, the rear end is connected to the pressure device, and the left and right ends are respectively connected to the guide adjustment mechanism; the pressure device is equipped with a pre-compressed spring, and the shell is under the action of the restoring force generated by the deformation of the pre-compressed spring. The mover guide rails keep in contact; the mover guide rails, pre-pressure device and guide adjustment mechanism are all installed on the base; the stator structure consists of a stator support plate and two symmetrically distributed driving feet, laminated piezoelectric ceramics, pads, and long hinges , Composed of pre-tightening screws. The symmetrical motor has a simple structure and is easy to install, effectively ensuring the consistency of bidirectional actuation performance of the piezoelectric motor. Applying certain electrical signals to the four groups of laminated piezoelectric ceramics respectively can realize the bidirectional linear motion of the piezoelectric motor.

Description

technical field [0001] The invention relates to a non-resonant piezoelectric linear motor, belonging to the technical field of piezoelectric precision actuation. Background technique [0002] The inverse piezoelectric effect of piezoelectric ceramics has the characteristics of high precision and fast response when applied to actuators, and has been favored by many researchers this year. In order to make the piezoelectric material produce sufficient deformation output, it is often necessary to apply a high voltage on the piezoelectric sheet, and the resonance of the structure is also used to amplify the micro-deformation of the piezoelectric material, which increases the complexity of the driving circuit. At the same time, the structure There is a strong nonlinearity in the resonance of the actuator with the frequency of the input electrical signal, which brings many technical difficulties to the control of the actuator. [0003] Multilayer piezoceramic is a new type of piez...

AI Technical Summary

Problems solved by technology

[0004] The main problem of the current non-resonant piezoelectric motor is the hysteresis effect of laminated piezoelectric ceramics, which leads to a certain difference in the bidirectional performance of the piezoelectric linear motor; it is difficult for the two driving legs of the bipedal stator to contact the mover guide rail at the same time And maintain a similar contact state, resulting in unstable performance of the motor; the stator drive foot and the mover adopt a point contact form, which limits the thrust of the motor to a certain extent

Images