Driving-force-controllable four-channel piezoelectric steering engine

Abstract

The invention discloses a driving-force-controllable four-channel piezoelectric steering engine and belongs to the field of a piezoelectric actuator. Through bending deformation of axial pre-compression simply supported bimorphs, the driving force between a stator and a rotor of the piezoelectric steering gear is changed, thereby realizing independent operation of four rudders. A frame structure formed by four rods attached with ceramic sheets serves as the stator to provide the driving force, which drives the rotor and rudder surfaces to rotate; the piezoelectric bimorphs are arranged betweenthe rotor and a base; and pre-pressure and friction between the stator and rotor are changed by deformation of the bimorphs, so that the problem that when the four rudders are driven by the same stator, the four rudders must act simultaneously is solved, and the four rudders can be controlled separately. The axial pre-compression simply supported bimorphs are utilized as a pre-pressure fine-tuning mechanism to change the driving force between the stator and the rotor; the four-channel piezoelectric steering engine is simple in structure and easy to realize, improves electromechanical conversion efficiency, solves the problem that multi-channel independent actuation cannot be realized since the piezoelectric actuator adopts one stator, and realizes multi-channel independent actuation.

Description

technical field [0001] The invention belongs to the field of piezoelectric actuators, in particular to a four-channel piezoelectric steering gear with controllable driving force. Background technique [0002] Various actuators designed and made of piezoelectric ceramics usually have many advantages such as fast response, high bandwidth, and good control accuracy, and these advantages are very consistent with the design requirements of steering gear. Therefore, more and more designs Researchers tend to apply piezoelectric ceramics to the integrated design of steering gear. Due to the flexibility and diversity of the design of piezoelectric actuators, researchers have proposed a variety of piezoelectric steering gears. , it is difficult for most piezoelectric steering gears to achieve multi-channel individual control, and the design of integrating multiple small piezoelectric actuators in the same steering gear can achieve multi-channel individual control, but due to the smal...

AI Technical Summary

Problems solved by technology

Due to the flexibility and diversity of the design of piezoelectric actuators, researchers have proposed a variety of piezoelectric steering gears. , it is difficult for most piezoelectric steering gears to achieve multi-channel individual control, and the design of integrating multiple small piezoelectric actuators in the same steering gear can achieve multi-channel individual control, but due to the small actuator Due to the limitation of the size of the stator and rotor, this kind of steering gear cannot generate a large enough output torque, so it is not applicable in many occasions

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