光纤陀螺仪中尖峰脉冲引起漂移的误差分析及其抑制

摘要

首次分析了光纤陀螺仪探测器输出信号中频率固定的尖峰脉冲对光纤陀螺仪零偏漂移的影响机理，给出了尖峰脉冲影响光纤陀螺仪零偏漂移的误差模型；根据干涉式数字闭环光纤陀螺仪探测器输出信号的特点，提出了一种基于高速集成模拟开关的时域选通尖峰脉冲抑制具体实现方法，实验验证了尖峰脉冲引起的零偏漂移大小和理论分析接近，表明了误差模型的正确性，同时表明该方法能够有效降低尖峰脉冲引起的光纤陀螺仪零偏漂移。%Effect of spike pluses in PIN-FET output signal on bias drift of fiber optic gyro is analyzed for the first time in this paper. The error model of bias drift resulted from spike pluses is given. After the character of PIN-FET out-put signal of fiber optic gyro is analyzed, a time-domain input signal strobe method based on high-speed analog switch is designed for elimination of spike pluses in PIN-FET output signal. Finally, an experiment is made to verify the error model, the experimental results show that the theoretic analysis and the designed spike pluses suppress method is practi-cable and the bias drift resulted from spike pluses can be decreased effectively.