Research on the feedback control characteristics and parameter optimization of closed-loop fiber optic gyroscope

The feedback parameter of closed-loop fiber optic gyroscope (FOG) in various engineering applications is discussed. It has been proved that unreasonable feedback parameter will cause great interference and serious distortion to the output signal. Therefore, we build a concise feedback control mode and obtain optimal range of feedback parameter. For different input signals concerned which nearly include all of the application scenarios in practice, detailed simulations and experiments are completed. The results show that the feedback parameter should be small in static applications and moderate for high response requirements. What is more, it should be relatively small when used in low-bandwidth measurement fields to ensure the response performance of low frequency signal and suppress high frequency noise and vice versa. This work plays an important guiding role for related parameter setting in the feedback control system of sensors, especially for gyroscope.