Automatic compensation method for static drift of sight line of stabilized photoelectric sight system

Abstract

The invention discloses an automatic compensation method for static drift of a sight line of a stabilized photoelectric sight system, and belongs to the field of automatic control. The method comprises the steps that an automatic tracking control loop is disconnected under a small view field of a sight tool of the stabilized photoelectric sight system; the tracking displacement deviation is counted in a certain period; the drift velocity of the sight line is calculated by using a least square curve fitting algorithm; the drift velocity is converted into corresponding control voltage; a gyro stabilization loop is reversely added to compensate drift motion; and a servo control system is controlled by a timer to automatically and repeatedly execute the operation until the drift velocity is less than a specified threshold. The method is achieved by completely adopting a software algorithm, solves the problems of slow manual drift compensation and low compensation accuracy, is simple in algorithm and high in portability, and is suitable for drift compensation of the sight line of the existing on-board stabilized photoelectric sight system.

Description

technical field [0001] The invention belongs to the field of automatic control, and mainly relates to a line-of-sight drift compensation method of a photoelectric stabilization system, in particular to an automatic compensation method for static line drift of an airborne photoelectric stabilization system. Background technique [0002] The airborne photoelectric stabilization system is a kind of photoelectric equipment installed on the weapon platform to detect, identify and aim at the target. It generally uses the rate gyroscope as the angular velocity sensitive element, and through the closed-loop control of the velocity, it ensures that the line of sight is in the inertial space. of stability. When the photoelectric stabilized aiming system is put into use, with the change of time and temperature, the characteristics of the system components will change to a certain extent, and the static drift of the line of sight will also change accordingly. Therefore, before the airc...

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Problems solved by technology

Compared with manual drift compensation, this method uses image processing to extract drift is more advanced, but on the one hand, this invention needs to be equipped with additional CCD equipment, which increases the complexity of the system, and is not suitable for airborne photoelectric stabilization systems; On the one hand, because the motion drift of the line of sight relative to the target is obtained through the indirect acquisition of the monitor image by the CCD, the extraction of the image feature points is affected by many factors such as the frame rate, contrast, brightness of the monitor, and the position of the CCD relative to the monitor. Therefore, the stability of the compensation accuracy cannot be guaranteed

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