捷联惯导系统快速初始对准方法仿真研究

The Simulation Study on the SINS Rapid Alignment Technology

捷联惯导系统(SINS)静基座初始对准时,由于方位误差角的观测度较低,使对准的时间比较长。为了实现SINS的快速初始对准,在东—北—天坐标系下推导了快速对准方法;采用小波滤波和卡尔曼滤波相结合进行初始对准滤波。仿真结果验证了小波——卡尔曼组合滤波方法的有效性。

When the stationary SINS initial alignment is in process, it usually takes rather long time because of low observability of the azimuth misalignment angle. In order to carry on with rapid alignment, the rapid alignment method is derived in the ENξcoordinate system. And a new filtering technology combining wavelet filtering with Kalman filtering is employed. Simulation results show that the new filtering technology is efficient to achieve rapid alignment of stationary SINS.