摘要
线晃动初速度会对惯性系粗对准精度产生可观的影响。误差分析表明,在纬度45°处,2min的粗对准时间内,0.1m/s的北向晃动初始线速度将产生3.15°的方位误差角。针对这一问题,通过多项式最小二乘拟合算法估计出了线晃动初速度,实现了对包含线晃动初速度在内的线晃动干扰的抑制。将所提的优化惯性系粗对准算法和其他相关惯性系粗对准算法通过车载实验进行比较。实验表明,所提优化算法稳定性好,方位误差小于0.05°,达到相对最佳对准效果。
The initial velocity due to the linear vibration will affect the precision of the inertial coarse alignment considerably.According to the error analysis,the 0.1m/s initial north velocity will lead to the head error by 3.15° for the inertial coarse alignment within 2 minutes in latitude 45°.To address the issue,the linear vibration including the initial velocity can be well suppressed throuth the polynomial least square approximation.The proposed improved inertial coarse alignment algorithm is compared with the other related inertial coarse alignment algorithms through vehicular experiments.And the results show that the proposed improved algorithm is of good stability and the head error is less than 0.05°,which achieves the best alignment results.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2016年第1期142-146,共5页
Systems Engineering and Electronics
基金
国家自然科学基金青年科学基金(61301021)
装备预研共用技术基金(9140A09040614KG 01132)资助课题
关键词
初始对准
粗对准
惯性系
晃动
initial alignment
coarse alignment
inertial frame
vibration
