Error observer-based feedforward control method of fast mirror

Abstract

The invention relates to an error observer-based feedforward control method of a fast mirror. For the disadvantages in feedforward control of the fast mirror at present, a high-gain observer is achieved by fusing a visual axis error amount provided by a CCD and an output quantity of a position ring controller, so that observation and estimation of a target position are achieved, feedforward control on the target position is achieved and a CCD tracking error is reduced. The method is CCD sensor-based data fusion feedforward, so that the method is effective to target tracking and also effective to CCD-based fast mirror disturbance rejection, and the application range is relatively wide. The method is output depending on a position controller, but not output of an outer ring, so that the method is not limited by the sampling rate of an outer ring sensor, and the control flow of a system can be simplified only by the error amount returned by the CCD. Meanwhile, the control structure is relatively simple in actual engineering realization, the calculation amount is smaller, the control complexity is lower and the error observer-based feedforward control method is more intuitive and easy to understand.

Description

technical field [0001] The invention belongs to the field of photoelectric system tracking control, and in particular relates to a fast mirror feedforward control method based on an error observer, which is used to reduce tracking errors and further improve the tracking performance of the fast mirror for maneuvering targets. Background technique [0002] When the photoelectric tracking control system realizes the tracking of the moving target, it mainly relies on the feedback tracking method based on the visual error. As a visual tracking error sensor, CCD is widely used in the frame control loop and the fast mirror control loop in the photoelectric system. The fast mirror control loop is used to achieve high-precision locking and tracking of the target, and its tracking accuracy determines the final overall performance of the system. The traditional fast mirror tracking control mainly relies on the eddy current position sensor and the CCD visual error sensor to realize the...

AI Technical Summary

Problems solved by technology

The structure of this method is relatively complicated, and it needs to rely on external sensors to realize; and CCD data is also used when realizing the target speed prediction, and the delay in it will also lead to a large error in the target speed prediction, resulting in poor use effect

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