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基于信号处理和随机过程理论,研究了基于时分复用(TDM)技术的三轴光纤陀螺(FOG)的整体精度,利用差分方程建立了TDM闭环处理中相位差的衰减模型。将单轴总体噪声分为稳态噪声和调整噪声两部分,推算出了单轴信噪比(SNR)的计算公式,并对各影响参数进行了仿真分析,提出了相应的改进建议。设计了FOG实验,验证了模型分析的合理性及正确性。
Based on the theory of signal processing and stochastic process, the overall accuracy of three-axis fiber optic gyro (FOG) based on time-division multiplexing (TDM) is studied. The phase difference attenuation model of TDM closed-loop processing is established by using the difference equation. The uniaxial total noise is divided into two parts: steady-state noise and noise-adjusting. The calculation formula of single-axis signal-to-noise ratio (SNR) is deduced and each influencing parameter is simulated and the corresponding improvement suggestions are put forward. The FOG experiment was designed to verify the rationality and correctness of the model analysis.