A Fast Mirror Stabilization Method Based on Accelerometer and CCD Fusion

Abstract

The invention discloses a method for stabilizing a fast mirror based on the fusion of an accelerometer and a CCD. Aiming at the problem that the accelerometer has low frequency drift and noise in the fast mirror stability control, the acceleration inner loop has insufficient disturbance suppression ability. This method adds a virtual velocity closed loop between the acceleration closed loop and the CCD position closed loop to increase the disturbance of the system. Inhibition. The virtual speed loop adopts the speed generated by the accelerometer and CCD through the complementary filter fusion method, which is equivalent to obtaining a virtual gyroscope without adding additional sensors. This method is to optimize the system from the use of the sensor, and give full play to the characteristics of good high-frequency performance of the accelerometer and excellent low-frequency performance of the CCD, so that the performance of the sensor is complementary, and the performance of the fast mirror is improved without increasing the cost. Anti-interference performance.

Description

technical field [0001] The invention belongs to the field of inertial stabilization of photoelectric tracking systems, and specifically relates to a fast mirror stabilization method based on the fusion of accelerometers and CCDs, which is mainly used to improve the anti-interference performance of the system at low and medium frequencies, thereby further increasing the stability of the photoelectric tracking system of the motion platform boresight performance. Background technique [0002] In the photoelectric tracking system, in order to improve the tracking accuracy and anti-interference performance, on the basis of rough tracking, it is often necessary to add another level of fine tracking structure to form a composite axis control system. Compared with coarse tracking, the fast mirror fine tracking system driven by voice coil motor or piezoelectric ceramics has the advantages of small moment of inertia, high bandwidth, and good linearity. The fast mirror system on the m...

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Problems solved by technology

[0003] Aiming at the problem of insufficient low-frequency disturbance suppression ability in the fast mirror control system based on the accelerometer and CCD, the present invention proposes a method for sensor fusion through complementary filtering, extracting the low-frequency signal of the CCD and the high-frequency signal of the accelerometer respectively, and using to synthesize a high bandwidth velocity signal

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