Positive stress electromagnetic driven fast deflection mirror actuating mechanism and actuating method

Abstract

A positive-stress electromagnetically-driven fast deflecting mirror actuating mechanism and an actuating method are provided. The actuating mechanism includes a mirror surface support structure, a base, and a universal flexible hinge support connecting the mirror surface support structure and the base. The actuating mechanism further includes four positive-stress electromagnetic actuators fixed between the mirror surface support structure and the base and symmetrically distributed about the universal flexible hinge support. The bottom of each positive-stress electromagnetic actuator is fixed on the base, and the top is connected with a rod type displacement amplification mechanism through an actuating rod. Each rod type displacement amplification mechanism and the mirror surface support structure are connected through a straight beam type flexible hinge. The four positive-stress electromagnetic actuators are of the same structure and size, and each positive-stress electromagnetic actuator includes a fixed core, a permanent magnet, excitation coils and a moving core. The four positive-stress electromagnetic actuators and the mirror surface support structure are connected by the straight beam type flexible hinges through the rod type displacement amplification mechanisms of the actuators. The invention further provides an actuating method of a fast deflecting mirror. The actuating mechanism has high resolution, and has the characteristic of compact structure and fast response.

Description

technical field [0001] The invention relates to the technical field of light beam pointing angle adjustment control, in particular to an actuating mechanism and an actuating method for a fast deflecting mirror driven by normal stress electromagnetics. Background technique [0002] With the development of space laser communication technology, the beam pointing angle adjustment mechanism is more and more widely used in space laser communication. At present, most beam pointing adjustment mechanisms are mainly divided into piezoelectric drive and voice coil motor drive according to different driving methods. The piezoelectric drive is characterized by high operating frequency and wide bandwidth range, but the angle adjustment range is small, and a displacement amplification mechanism is needed to expand the angle adjustment range, and the power consumption is high; the voice coil motor drive uses the ampere force to push the mirror structure, and its It is characterized by large...

AI Technical Summary

Problems solved by technology

[0002] With the development of space laser communication technology, the beam pointing angle adjustment mechanism is more and more widely used in space laser communication. At present, most beam pointing adjustment mechanisms are mainly divided into piezoelectric drive and voice coil motor drive according to different driving methods. The piezoelectric drive is characterized by high operating frequency and wide bandwidth range, but the angle adjustment range is small, and a displacement amplification mechanism is needed to expand the angle adjustment range, and the power consumption is high; the voice coil motor drive uses the ampere force to push the mirror structure, and its It is characterized by large driving force, low power consumption, and large angle adjustment range, but limited by the rigidity of the structural support, the frequency band range is small, and the control current increases with the increase of the adjustment angle range, causing severe heat generation and affecting the overall system performance.

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