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去除抖动信号是机械抖动激光陀螺(MDRLG)信号处理部分的关键工作,传统的去抖方法限制了MDRLG在快速跟踪中的应用。文中基于自适应对消原理,建立了激光陀螺抖动信号剥除的模型,实现了系统硬件电路的设计,并编写了19阶有限脉冲响应滤波程序和最小均方算法、递归最小二乘算法的自适应解调程序。基于该系统,对转台上的激光陀螺从静止加速到200(°)/s的过程进行了测试,实验结果表明:自适应对消能够有效去除陀螺计数脉冲中的抖动成分,其去抖动效果优于19阶的FIR滤波器,且输出角速率是实时的。该去抖算法拓展了MDRLG的应用范围。
Removing jitter signals is a key part of the signal processing part of the mechanical dithering laser gyro (MDRLG). The traditional debouncing method limits the application of MDRLG in fast tracking. In this paper, the model of laser gyro jitter signal stripping is established based on adaptive cancellation principle, and the hardware circuit design of the system is achieved. The 19-order finite impulse response filter and the least mean square algorithm are constructed. The recursive least square algorithm Adapt to the demodulation process. Based on this system, the process of accelerating the gyro from turntable to 200 (°) / s is tested. The experimental results show that the adaptive cancellation can effectively remove the jitter component in the gyro counting pulse, and the de-jitter effect is excellent FIR filter on order 19, and the output angular velocity is real time. The debounce algorithm expands the application of MDRLG.