最小阶时分滤波器及其在运载体对准中的应用

Minimal Order Time Sharing Filters for INS In Flight Alignment

设计一种时分降低滤波器用来进行运载体惯导系统的动态对准和传递对准。假定运载体惯导系统为已标定的。在运载体水平直线运动的短时间内，两个二阶滤波器以时分工作方式估计平台水平失调角。在消除水平失调角后，运载体在垂直与当地垂线的水平面内机动，此时用一个三阶（或四阶）滤波器来估计方位失调角。另外，在本文中给出该滤波器的数据压缩算法，来提高估计精度。

This paper proposes very simple reduced order filters for In flight and transfer alignment of calibrated inertial navigation systems(INS) The shuttle is moved for a short duration in a straight and level flight,during which two second (or third )order time sharing filters estimate the level misalignment After removing the estimated level misalignment angles a third (or fourth)order filter is switched in to estimate the azimuth misalignment as the shuttle starts to maneuver in the lateral trajectory Moreover,this paper applies batch recursive data compression schemes to INS error estimation minimal order filters