Control method for reducing coupling of X axis and Y axis in two-axis rapid reflector

Abstract

The invention discloses a control method for reducing coupling of an X axis and a Y axis in a two-axis rapid reflector. The control method reduces the coupling degree of the X axis and the Y axis from2% or more to less than 0.1% without improving the processing and assembly requirements, and effectively improves control stability, interference resistance and positioning precision of the X axis and the Y axis in a reflector system. The control method comprises the steps of: [1] acquiring transfer functions Gx, Gy and coupled transfer functions Gxy, Gyx; [2] adopting MATALB software to design correction transfer functions Gxc, Gyc satisfying index requirements; [3] designing compensation transfer functions Gxyc, Gyxc; [4] establishing an analog / digital controller; [5] and utilizing the analog / digital controller to control the analog / digital controller.

Description

technical field [0001] The invention relates to a control method for reducing two-axis coupling, in particular to a control method for reducing X-axis and Y-axis coupling in a two-axis fast mirror. Background technique [0002] With the continuous development of high-precision technology, especially the development and demand of astronomical exploration, medical and industrial fields, the precise pointing, phase shift compensation, tracking and stabilization of beams have received extensive attention and a lot of research. Among them, beam stabilization technology is one of the core technologies in the research of laser processing, space laser communication, and large-aperture astronomical telescopes. [0003] The fast mirror adopts a flexible structure different from the traditional shaft system, and uses a voice coil motor or piezoelectric ceramic with high bandwidth response and nanoscale displacement response resolution as the actuator; secondly, a high-precision micro-d...

AI Technical Summary

Problems solved by technology

[0013] For the fast two-axis mirror supported by a flexible structure mentioned in the above background, due to the deformation of the flexible support structure itself, the non-perpendicularity of the two rotation axes caused by manufacturing, and the non-collinearity between the installation position of the actuator and the rotation axis The X-axis and Y-axis mutual coupling problems caused by the deviation of the measurement element and the non-collinear factors of the installation position of the measuring element and the rotation axis, the present invention proposes a control method that can significantly reduce the coupling of the X-axis and Y-axis in the two-axis fast mirror , without improving the processing and assembly requirements, the coupling degree of the X-axis and Y-axis is reduced from more than 2% to less than 0.1%, which effectively improves the control stability and interference immunity of the X-axis and Y-axis in the mirror system Capability and Positioning Accuracy

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