A method for avoiding image motion of a photoelectric tracking system in a target approaching process

Abstract

The invention discloses a method for avoiding image motion of a photoelectric tracking system in a target approaching process. In order to solve the problem that in the target approaching process of aphotoelectric tracking system, when the relative speed of a rack and a target is too high, an optimal step size image motion controller is additionally arranged in front of a position ring controllerin a control framework of the photoelectric tracking system to avoid the image motion problem. The method comprises the specific implementation steps that firstly, an optimal step length image motioncontroller calculates the optimal step length input by a position ring controller at the current moment, and the step length enables the response of a system to be fastest under the condition that the maximum allowable image motion of the system is met; then, the optimal step size image motion controller determines the input of the position ring controller according to the current miss distance and the optimal step size, and sends the input into the position ring. The method provided by the invention solves the image motion problem of the photoelectric tracking system in the target approximation process, has the advantages of high response speed, small overshoot and the like, and is convenient for engineering realization.

Description

technical field [0001] The invention belongs to the control field of a photoelectric tracking system, and in particular relates to a method for reducing image motion of a photoelectric tracking system during the approaching process of a target. Background technique [0002] Image motion refers to the relative movement of the target image point on the focal plane of the camera. It is a physical phenomenon that often occurs in the imaging process of photoelectric systems based on moving carriers such as space cameras, aerial cameras, and weapon sighting systems. It will cause smearing , Blurred target edges, untrue gray scale and other issues will reduce the imaging quality. In order to improve the imaging quality, researchers have adopted different image motion compensation methods for different application scenarios. For space remote sensing cameras, Li Yongchang and others adopted the method of adjusting the camera's pendulum measurement to offset the image motion caused b...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: during the target approaching process of the photoelectric tracking system, if the relative speed between the frame and the target is too high, the target image point will move a large distance on the camera focal plane within the camera exposure time, reducing the imaging quality , which in turn affects the extraction of off-target information

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