Fiber optic gyro signal random drift testing and noise error analysis

According to the bad influence of fiber optic gyro(FOG) signal random drift in inertia stabilized platform system, the properties of the FOG signal random drift are detected with the Allan variance method. By the relation between the Allan variance of signal noise and power spectrum density (PSD), the sources of some kinds of noise and its properties are analyzed and calculated using fitting algorithm in the least square method (LSM). The result of testing and statistic analyzing for FOG signal indicate that the Allan variance means is successful in separating and estimating the main random error source of FOG signal noise.