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针对振动应力下光纤陀螺产生测量误差增大的问题,从振动对光纤环的影响机理出发,分析了振动应力下光纤陀螺干涉信号的表现形式,提出了基于自回归最小均方滤波理论的光纤陀螺滤波方法,将AR模型的平稳性和最小均方根滤波的自适应性相结合,提取平稳数据的特性参数,对高频信号进行滤波,降低非互易相移产生陀螺角速度误差值的干扰。试验表明,该方法简单可行,有效地降低了振动应力下光纤陀螺输出信息的噪声,抑制了由振动引起的陀螺漂移。
Aiming at the problem that the measuring error of fiber optic gyroscope is increased under vibration stress, this paper analyzes the influence of vibration on the fiber ring, analyzes the manifestation of interference signal of fiber optic gyroscope under vibration stress, and proposes a fiber optic gyroscope based on the least mean square Filtering method, combining the stationary of AR model with the adaptive of minimum rms filtering, extracting the characteristic parameters of stationary data, filtering the high frequency signal and reducing the interference of gyroscopic angular velocity error caused by non-reciprocal phase shift. Experiments show that this method is simple and feasible, effectively reducing the noise of the output information of fiber optic gyroscope under vibration stress and restraining the gyro drifting caused by vibration.