Friction force controllable type linear piezoelectric actuator and control method thereof

Abstract

The invention discloses a friction force controllable type linear piezoelectric actuator and a control method thereof. The friction force controllable type linear piezoelectric actuator comprises a rotating block, a contact head, a fixed block, a rotor, a laminated piezoelectric ceramic, a mass block and an elastic element; the rotor can move in a first direction; the fixed block is fixedly arranged on the rotor; one end of the laminated piezoelectric ceramic is fixedly arranged on a side wall of the fixed block, and the other end of the laminated piezoelectric ceramic is fixedly connected with the mass block; the fixed block, the laminated piezoelectric ceramic and the mass block are arranged in sequence in the first direction; the second end of the rotating block can swing around the first end; the second end of the rotating block is fixedly provided with the contact head; and the elastic element is connected with the rotating block to enable the contact head to press against the rotor.

Description

technical field [0001] The invention relates to the technical field of piezoelectric precision braking, in particular to a friction-controllable linear piezoelectric actuator and a control method thereof. Background technique [0002] The inverse piezoelectric effect of piezoelectric ceramics can convert electrical energy into mechanical energy. In recent years, the optimization of the manufacturing process has enabled large-scale production of piezoelectric ceramics, and laminated piezoelectric ceramics are increasingly used in precision drives. . The piezoelectric linear motor made of the inverse piezoelectric effect of laminated piezoelectric ceramics has many advantages, such as high displacement resolution, large bearing capacity, high output rigidity, good output displacement repeatability, simple and easy control, and ability to overcome electromagnetic waves. Interference, high temperature, low temperature and other issues. [0003] At present, there are mainly two...

AI Technical Summary

Problems solved by technology

The inchworm precision drive can provide greater precision and thrust, but due to its complex structure, the drive frequency is small, resulting in low drive speed, and the complex structure also makes control more difficult, and the installation accuracy is difficult to control; The matching wear of the type precision drive is serious, which eventually leads to poor contact, which makes the drive of piezoelectric ceramics produce errors and weakens the performance

The structure of the inertial friction piezoelectric drive device is relatively simple, the control is easier, and the driving speed is relatively high.

Images