Photoelectric tracking system control method based on differential tracker

Abstract

The invention discloses a photoelectric tracking system control method based on a differential tracker, and belongs to the field of photoelectric system tracking control. For the current situations that only the position is used for back feeding signals, negative factors of amplifying the noise through a differentiation element, and the like exist in traditional PID controllers cannot meet the tracking control requirements with the higher precision. According to the photoelectric tracking system control method based on the differential tracker, the differential tracker and a PID controller arecombined effectively, the transition process is arranged reasonably, fast tracking without overshooting and synchronous differential output for input signals are realized, the noise amplification effect can be effectively lowered, the steady-state error is reduced, controller design is simplified and the control quality is improved, and the tracking performance of photoelectric tracking equipmentof a moving platform is further improved.

Description

technical field [0001] The invention belongs to the field of photoelectric system tracking control, and specifically relates to a method for controlling a photoelectric tracking system based on a differential tracker. The differential tracker is effectively combined with a PID controller to fully improve the availability of the system and further improve the photoelectric tracking of the motion platform. The tracking performance of the device. Background technique [0002] In the photoelectric tracking system, when the target enters the TV or infrared field of view, the deviation angle of the target relative to the center of the field of view is the tracking deviation, and the deviation can be used as the error to complete the closed loop to realize the tracking control of the target. In many cases, the simple feedback position signal control cannot meet the dynamic requirements of the photoelectric tracking system. Appropriately introducing the differential signal of the co...

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Problems solved by technology

[0004] The traditional PID controller is used in the photoelectric tracking system. The control principle is to eliminate the error based on the error. Only the error signal obtained by the CCD sensor is used. The weighting and control strategy based on the past, present and change trend of the error is not easy to meet the high-performance control requirements. , aiming at side effects such as noise amplification in the differential link in the controller, this method combines the differential tracker to effectively extract the original signal (that is, tracking) and the differential signal, which not only solves the long-standing problems in engineering, but also overcomes the traditional PID controller. Negative factors such as noise amplification in the link, reflect strong anti-noise ability under noise disturbance, so as to improve control quality and simplify controller design

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