Research On Data Processing Method Of IFOG

The interferometer fiber-optic gyro (IFOG) has own unique advantage so that it attracted the worldwide interesting of many research organizations. Today, the low-and medium-performance IFOGs have advanced have to widely apply to the inertial measurement system of civil equipment and military tactical weapons, and the many research organization of the world are also development the high-performance inertial navigation grade IFOG system applied in the areas of marine or aerospace.This theory of closed-loop IFOG is analyzed and the all-digital closed-loop system is designed. In this scheme digital demodulator is used to detect IFOG's signal, digital phase ramp modulator is used as feedback controlling and digital filter is used to limit noise and lower the bits of A/D? D/A converters.This paper were analyze the characteristic of the drift and discuss the compensation methods for it. The paper studies the suppressing method of IFOG 's drift and build ARIMA models of IFOG random drift to compensate random drift.This paper has meaningful to the research and development of high- precision IFOG.