Overall Coordinated Control Method of Stetiostat and Tilting Mirror

Abstract

An overall coordination control method for a coelostat and a tilting mirror comprises the following steps: after a coelostat reflects target light, the target light is transmitted to a tilting mirror through an optical transmission system; the tilting mirror reflects the target light again and then transmits the target light to a beam splitter, the beam splitter splits the target light into two parts, one part enters a main light path, and the other part is projected by a convex lens to the imaging plane of a target light detection camera; the detection camera detects the error between an actual beam direction and an expected beam direction, gets a task error vector, and transmits the task error vector to a main controller of the system; the motion of the coelostat and the motion of the tilting mirror are jointly molded into a series four-degrees-of-freedom mechanical arm model; and the main controller calculates the target rotation speed of the motion model under each joint degree of freedom and drives the moving parts of the system, and finally, the beam direction is output stably. The problem that the two systems move out of tune during hierarchical control is solved. Therefore, the problem that the beam stability is largely affected due to out-of-tune motion is solved, and the stability of the systems and beams are improved.

Description

technical field [0001] The present invention relates to an overall coordinated control method for astrostats and tilting mirrors in astronomical observation instruments, in particular to an overall coordinated control method for astrostats and tilting mirrors based on multi-degree-of-freedom redundant analytical control, so as to ensure the introduction of target light sources beam stability. The invention relates to atmospheric optics, robotics and related signal processing, electronic computer, motor control and other technical fields. Background technique [0002] Static mirrors and tilting mirrors have been used in the field of astronomical observation for many years. Among them, the fixed mirror is mainly used to eliminate the influence of relative motion between the earth and the space target, and continuously introduce the target light source into the input end of the astronomical observation instrument, which belongs to low frequency Movement; while the tilting mirr...

AI Technical Summary

Problems solved by technology

This control method can improve the stability of the beam to a certain extent, but it does not take into account the influence of the astrostat as the first step of beam introduction on the stability of the rear beam.

The beam jitter and tilt caused by the movement of the astrostat will often be coupled to the back-end optical system, especially in the current control method, the tilting mirror may move to the limit position, and correcting the astrostat at this time will often make the tilting mirror in the The position jump occurs in a short time, which has a great impact on the stability of the beam and even causes the instability of the tracking system

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