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去除激光陀螺输出信号中的抖动信号是机械抖动偏频激光陀螺(MDRLG)信号处理电路的主要工作之一。文章对LMS算法中误差因子响应特性对LMS自适应抖动剥除效果的影响进行了研究。为改善抖动剥除效果,在自适应抖动剥除算法中引入了带通滤波器,并采用基于FPGA的激光陀螺自适应抖动剥除系统对误差因子采用带通滤波时的静态性能和动态响应特性进行了测试。试验结果表明,误差因子采用带通滤波时,LMS自适应抖动剥除的收敛速度和收敛精度都要优于差分运算,并且二者具有相同的动态频率响应曲线。
Removing the dithering signal from the laser gyro output signal is one of the main tasks of the MDRLG signal processing circuit. In this paper, the influence of error factor response in LMS algorithm on adaptive jitter removal of LMS is studied. In order to improve the jitter stripping effect, a band-pass filter is introduced in the adaptive jitter removal algorithm, and the static performance and dynamic response characteristics of the error factor when adopting the band-pass filtering method based on FPGA-based laser gyro adaptive jitter removal system taking the test. The experimental results show that when the error factor is band-pass filtered, the convergence speed and convergence accuracy of LMS adaptive jitter stripping are superior to those of differential operation, and the two have the same dynamic frequency response curve.