采用开关电路消除尖峰脉冲的陀螺及其理论分析

Fiber Optic Gyro with Switch Circuit for Eliminating Spike Pulse and Theoretical Analysis

陀螺输出波形中经常含有2倍于本征频率的尖峰脉冲误差信号。采用高速开关电路消除了光纤陀螺的尖峰脉冲,提高陀螺采样有用信号的信噪比。从理论分析和仿真上证明了这一方法不仅消除了尖峰脉冲,而且也消除了尖峰脉冲扩散在解调信号中的奇次谐波干扰。通过实验对比可以看出这一方法提高了陀螺的精度。

Gyro's output often contains the error signal whose frequency is twice as much as of the intrinsic frequency. In this paper,a high-speed switch circuit is used to eliminate the spike pulse of fiber optic gyroscope and improve the signalto-noise ratio of the sampled signal. This method proved to eliminate not only spike pulse but also odd harmonic interference which diffuse into the demodulation signal by theoretical analysis and simulation. The experimental results confirm that this method indeed improves the accuracy of the gyro.