Allan Variance Analysis of Fiber-optic Gyroscope Zero-drift Signal

The equipment and environment of fiber-optic gyroscope (FOG) zero-drift experiment are introduced. The hardware and software of the equipment are designed to collect the signal of FOG. Based on Allan variance theory, the zero-drift signal is quantitatively analyzed to get five coefficients of error source, including angle random walk，bias instability，rate random walk, rate ramp and quantized noise, among which the angle random walk and bias instability coefficients exert main influences on FOG. The results are expected to become a theoretical basis for error compensation of FOG.