A Design Method of Fuzzy Type II Controller for Photoelectric Tracking System

Abstract

The invention provides a fuzzy II controller design method for a photoelectric tracking system, which belongs to the field of photoelectric system tracking control. Adding an integral link to the commonly used double closed-loop type I system improves the type and becomes a type II system, which can improve and reduce the steady-state error, but it will increase the overshoot of the system step response and aggravate the system oscillation. The present invention introduces a fuzzy controller in series with the integral link and then connects it in parallel to the forward path of the photoelectric tracking system, judges the gain of the integral link through the error state, and solves the large overshoot that occurs during tracking while improving the steady-state accuracy of the system problems, and effectively suppress the shock caused by the type increase. The present invention does not depend on precise mathematical models, is not limited to specific systems, and has wide applicability.

Description

technical field [0001] The invention belongs to the field of photoelectric system tracking control, and in particular relates to a design method for a fuzzy type II controller for a photoelectric tracking system. Solve the problem of high-level system oscillation, and fully improve the steady-state tracking accuracy of the photoelectric system. Background technique [0002] The photoelectric tracking system is a multidisciplinary technology integrating light, machinery and electricity. It is mainly used in the fields of moving target trajectory measurement, celestial object observation, spacecraft orbit determination, and space beam communication. It has a wide range of application values. At present, the speed of target movement is getting faster and faster with the development of technology, and the maneuverability is stronger, so tracking error is inevitable. The high-type system can effectively suppress the system tracking error and improve the steady-state accuracy of ...

AI Technical Summary

Problems solved by technology

[0004] 1) Judging the timing of the on-off of the integration link: judging the on-off of the integration according to the size of the system error, but the error range of the system can only be measured through experiments, and the threshold of the error cannot be defined

In the previous work, the threshold was given artificially, and there was no theoretical basis

[0005] 2) The moment when the integration link is connected and disconnected will bring jitter to the system and make the system unstable

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