扰动线运动对惯性系粗对准影响分析及优化方法

针对扰动线运动对惯性系粗对准精度影响较大的问题,通过分析惯性体坐标系下重力加速度积分矢量的物理含义,给出了受扰动线运动影响的惯性系粗对准的误差分析。并在此基础上提出了基于位移积分矢量构造定姿矢量矩阵的抗扰动粗对准算法,利用对速度积分矢量进一步积分得到的3个时间点的位移积分矢量构建姿态解算矩阵,抑制扰动线运动对粗对准精度的影响。仿真结果表明,该算法可有效减小扰动线运动影响下的对准结果振动幅值,能够快速收敛到满足精对准使用的精度范围,从而提高武器装备环境适应性。

Analysis and Improvement Methods of the Influence of Linear Vibration on Inertial Coarse Alignment

To address the problem that linear vibration influences the precision of the inertial coarse alignment obviously,the error analysis of influence of linear vibration on inertial coarse alignment is given by analyzing the physical meaning of the integration of gravitational acceleration in the inertial body coordinate system.On this basis,an improved inertial coarse alignment algorithm based on integration of displacement vector to make attitude determination vector matrix is proposed.This algorithm calculates the integration of velocity integral vector to get the integration of displacement vector,and then it use the integration of displacement vector to get the attitude determination vector matrix.The analysis of experimental data shows that this algorithm can reduce the influence of linear vibration on inertial coarse alignment,and give a quick convergence coarse alignment result that meets the needs of entering fine alignment.