杆臂效应对捷联惯性导航系统初始对准精度的影响及其在线补偿方法研究

Study on the Influence of Dimension Effect on Initial Alignment of Strapdown Inertial Navigation System and its On-line Compensation Method

杆臂效应是由于惯性测量组件安装位置与载体摇摆中心不重合而产生的一种干扰加速度分量，对于以加速度计输出作为观测量的捷联惯性导航系统初始对准精度有较大的影响。本文以舰载捷联惯性导航系统作为应用对象，分析了杆臂效应的产生机理、对舰载捷联惯性导航系统初始对准误差的作用关系，提出了一种基于数字滤波原理的杆臂效应在线补偿方法，并给出了该方法的计算机仿真计算结果。

Dimension Effect Error is one of the major error sources of initialalignment of Strapdown Inertial Navigation System(SINS), which is due to the deviation distance between the position of accelerometers and rocking center of ship.This paper will discuss the theoretical principle of Dimension Effect,the influence of that on ini-tial alignment of marine SINS.Then, an online compensation method based on digitalfiltering of marine SINS will be brought out,the results of simulation will also be presented.