Analog control circuit capable of enlarging control bandwidth of fast steering mirror

Abstract

The invention discloses an analog control circuit capable of enlarging the control bandwidth of a fast steering mirror, and is suitable for the large bandwidth control of the fast steering mirror in a photoelectric composite shaft tracking system. The circuit comprises an analog signal interface circuit (1), a control algorithm circuit (2), an analog compensation circuit (3), a subtractor (4), a fast steering mirror system (5), a differentiating circuit (6), and a detection element (7). An output signal of the fast steering mirror system (5) passes through the differentiating circuit (6), and then is fed back to an input end of the fast steering mirror system (5), thereby achieving the adjustment of frequency response of the fast steering mirror. The analog compensation circuit (3) achieves the frequency compensation of an adjusted fast steering mirror system. The control algorithm circuit (2) enables an input signal to be converted into an analog control signal with a control strategy, thereby achieving the control of the compensated fast steering mirror system. The circuit can achieve the real-time compensation of the structure resonance of the fast steering mirror, improves the frequency response of the fast steering mirror, and achieves a simple control algorithm.

Description

technical field [0001] The invention relates to the field of photoelectric tracking, in particular to the high-bandwidth control of a fast reflector in a compound axis system. Background technique [0002] The FastSteeringMirror (FSM) is the core device in the photoelectric compound axis control system, which has the remarkable advantages of fast response, high precision, and large resolution. In the photoelectric composite axis control, the fast mirror is used as a fine tracking mirror to compensate the residual error left after the rough tracking is corrected to complete the fine tracking. The position tracking of the fast mirror in the fine tracking part must have a sufficiently high response speed and control bandwidth to effectively suppress the residual high-frequency error of the rough tracking. Therefore, it is necessary to study how to improve the control bandwidth of the FSM system position tracking. [0003] The control bandwidth of the FSM is mainly affected by ...

AI Technical Summary

Problems solved by technology

A second-order oscillation link is built by an incomplete differential control method, so that it has a reciprocal relationship with the second-order oscillation link of the fast mirror system. The two form a whole to eliminate the peak at the resonance of the fast mirror structure, but the hardware circuit The design is very complex and difficult to implement

Images