Optical floating gyroscope rotor rotating speed closed-loop control system and method based on optical power modulation

Abstract

According to the optical power modulation-based closed-loop control system and method for the rotating speed of the optical floated gyroscope rotor, the laser power is subjected to high-frequency modulation through an acoustic optical modulator (AOM), the torque applied to rotor particles by circularly polarized light is precisely controlled, and when the spatial attitude of an optical axis is changed due to precession, the polarization component of scattered light can be changed, so that the rotating speed of the rotor of the optical floated gyroscope is controlled. The photon angular momentum transmission value is changed, so that the rotating speed fluctuates. A rotating speed signal is directly measured by a photoelectric detector and is transmitted into a controller, an AOM modulation signal is generated through a control algorithm to change laser power, and it is ensured that the rotating speed of particles is kept within a preset range. According to the invention, the problems of precision reduction, noise increase and error accumulation in the prior art can be effectively solved, so that the working precision and stability of the light floating measurement system are improved.

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