Interference observation based quick reflector disturbance restraining method

A fast mirror, interference observation technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of limited interference signal suppression, compensation process delay, and inability to measure interference signals.

Active Publication Date: 2016-08-31
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

Since the feedback control is based on the error control, this control method works only after the disturbance enters and affects the fast mirror system, causing a certain delay in the compensation process, and the suppression effect on the disturbance signal is limited
Feedforward correction is an open-loop control method to compensate the disturbance signal. The fee

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  • Interference observation based quick reflector disturbance restraining method
  • Interference observation based quick reflector disturbance restraining method
  • Interference observation based quick reflector disturbance restraining method

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] The commonly used fast mirror feedback control model is as follows: figure 1 shown. In the figure, u represents the positioning position given by the beacon signal, which is usually a constant. d is the disturbance signal acting on the fast mirror system, and e is the deviation between the actual optical axis position and the given position. It can be seen that the disturbance signal directly acts on the fast mirror at this time, and the feedback control is performed after the deviation signal appears. There is a certain time delay for the correction. When there is a disturbance, the output of the fast mirror will produce a large error in the initial stage, which is difficult to meet the high-precision requirements of the system.

[0036] The feed-forward control structure diagram of the fast mirror is as follows figure 2 shown. The...

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Abstract

The invention discloses an interference observation based quick reflector disturbance restraining method. The method comprises a PID (Proportion Integration Differentiation) controller, a feedforward controller, a disturbance observer and a signal identifying and separating device, wherein the feedforward controller is formed by a proportional component and a second order component and is used for converting a disturbance signal influencing a quick reflector system into a compensating signal, inputting to a system forward channel and offsetting the disturbance signal influencing the controlled quick reflector; the disturbance observer is composed of a low-pass filter and a nominal model of the controlled quick reflector and is used for estimating the disturbance signal entering into the quick reflector system; the low-pass filter also has a function of eliminating the high-frequency measuring noise and restraining the outer interference. On the basis of the classic PID controlled quick reflector, the method utilizes the advantage of feedforward control and disturbance observation to fully restrain the disturbance in the system (no matter if the disturbance signal can be detected), so that the stable precision of the quick reflector system can be promoted.

Description

technical field [0001] The invention belongs to the field of precision mechanical control, and in particular relates to a disturbance suppression method for a fast mirror based on disturbance observation. Background technique [0002] The fast mirror is an important part of the optical system to adjust the beam propagation direction. Due to the complexity of the working environment, the fast mirror system is inevitably affected by various interference factors. These interference signals will cause the system to fail to produce accurate output, or even is the distortion of the output signal. Therefore, when designing the fast mirror control system, the influence of the interference signal on the system performance should be fully considered, so that the system has a strong ability to suppress the input interference signal. [0003] As a relatively mature control scheme, PID control technology is widely used in the control of fast mirrors. The control system of fast mirrors i...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/04
Inventor 艾志伟谭毅吴琼雁任戈
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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