【摘要】 抖动激光陀螺的角增量信号在抖动频率及邻域上存在高幅值的抖动噪声,对于抖动解调的数字滤波法,常规的信号处理手段并不能有效地利用这些频域特征,导致抖动成分滤除不彻底。为了进一步提高信号的精度,将FIR滤波器的设计问题转化为线性规划的求解过程,提出将滤波器部分零点设定到抖动频率处的滤波器性能优化方法,以最大程度衰减抖动信号;为应对抖动频率的不稳定性,进一步提出改进方法以提升特定频段的滤波性能。仿真结果表明,改进方法可优化抖动成分和高频噪声的滤除效果,从而抑制伪圆锥误差,提高陀螺系统的精度和稳定性。更多还原

【Abstract】 The signal of dithered laser gyro contains noticeable noise in some specific frequencies and bands.However,conventional FIR designers for demodulating dithered bias signal cannot deal with those frequency domain characteristics,which thus cannot lower specific frequency noises. In order to further improve the accuracy of the signal,this paper adopts linear programming to design FIR filter,which has zeros at dithered frequencies and special care for specific bands,achieving better performance in reducing dithered frequencies and high frequency noise. Accordingly,the filter is able to depress pseudo coning errors and improve the precision of navigation.更多还原