MULTI-PHASE MODULATION AND DEMODULATION-BASED FIBER-OPTIC GYROSCOPE MULTI-CLOSED-LOOP METHOD

摘要

A multi-phase modulation and demodulation-based fiber-optic gyroscope multi-closed-loop method. A modulation waveform of a fiber-optic gyroscope is reasonably designed, a modulation and demodulation period is divided into a plurality of phases, different modulation amplitudes are achieved on different phases, gyroscope output signals within the period are sampled, and demodulation of parameters such as angular rate, half-wave voltage parameter, and signal intensity is achieved separately by combining different closed-loop processing methods, thereby achieving multi-parameter multi-closed-loop control. According to the fiber-optic gyroscope multi-closed-loop method, the linearity, bias stability and the like of the fiber-optic gyroscope are improved, there is no need to add or change existing hardware, the working state of the fiber-optic gyroscope is detected in real time by means of a modulation and demodulation method, and the reliability is improved.