基于小波分析的捷联式惯导系统的初始对准方法研究

A Study on Initial Alignment Technique for Strapdown Inertial Navigation System Based on Wavelet Analysis

对于光纤陀螺捷联式惯导系统 ,提出了一种新的初始对准方法。采用小波分析方法提取初始对准的有用信号 ;用二位置法确定初始方向余弦矩阵 ,同时对光纤陀螺的常值漂移和加速度计零偏置进行标定。仿真结果表明了这种方法的有效性。

For the strapdown inertial navigation system (SINS) using fiber optical gyros (FOGs), a novel technique for initial alignment is proposed Firstly, wavelet analysis is used to extract the useful signal for initial alignment Secondly, two position technique is employed to obtain the initial direction cosine matrix, at the same time, the random constant drift of FOG and basis at zero input of accelerator are calibrated Simulation results show the validity of the method proposed in this paper