A Feedforward Control Method Based on Orthogonal Least Squares
A feed-forward control and least squares technology, applied in the field of photoelectric tracking control, can solve the problems of large delay characteristics, insufficient precision, and failure to meet the needs of the tracking system, and achieve small calculations, improve accuracy, and meet system real-time performance required effect
Active Publication Date: 2020-01-03
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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[0004] Aiming at the problems of insufficient accuracy of traditional predictive filtering algorithm and its large delay characteristic, which cannot meet the needs of the current actual tracking system, the present invention proposes a feedforward control method based on orthogonal least squares
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[0024] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0025] as attached figure 1 Shown is a schematic structural diagram of the feedforward control method based on orthogonal least squares, which includes an orthogonal least squares prediction algorithm module, a feedforward controller, a position correction controller, and a control object; the control device group includes a position The closed-loop feedback loop formed by the correction controller and the feedforward loop formed by the orthogonal least squares prediction algorithm module and the feedforward controller. The specific implementation steps of adopting described device to realize feed-forward control method are as follows:
[0026] Step (1): Install an encoder and an image sensor (CCD) on the tracking device. The encoder obtains the attitude angle information of the tracking device itself. The image sensor receives...
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The invention relates to a feed-forward control method based on orthogonal least square. In view of the problem that the traditional predictive filtering algorithm cannot satisfy the demand of the current actual tracking system due to low precision and big delay, the method uses orthogonal least square which considers independent variable noise and dependent variable noise at the same time in trajectory fitting and has the characteristics such as small delay and small amount of calculation. The precision of prediction can be improved under the condition that the requirement on the real-time performance of the system is satisfied. Thus, the adaptability of the system to high-frequency target maneuver is improved, the prediction tracking error of the traditional predictive filtering algorithm under sudden maneuver or sudden stop of a target is improved, and the system performance is improved. In addition, the method of the invention only relies on angular position information provided by a CCD detector and an encoder. The position and speed of a current real target can be estimated. Miss-distance information reducing delay is used to replace traditional directly measured miss-distance information. Thus, the tracking ability of a photoelectric tracking system is improved.
Description
technical field [0001] The invention belongs to the field of photoelectric tracking control, and specifically relates to a method for obtaining the real track position and speed of a target based on the angular position of the photoelectric device itself and the detected target miss amount, so as to use the information to perform predictive tracking and feedforward control. Background technique [0002] In the target tracking process of the photoelectric control system, the main purpose is to achieve high-precision tracking of the target. With the increasing mobility of the target object, the ordinary closed-loop control method has been unable to meet the tracking requirements, and it is necessary to accurately estimate the target's motion information (position, speed, acceleration) on this basis, and then use the estimated information to realize Feedforward control. The "fire pool" control system developed by Lincoln Laboratory in the United States uses angular position in...
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IPC IPC(8): G05B13/04
CPCG05B13/04
Inventor 邓超毛耀刘琼任维张超
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI