空间控制技术与应用 ›› 2013, Vol. 39 ›› Issue (1): 40-44.doi: 10.3969/j.issn.1674-1579.2013.01.007
摘要: 针对GIS量测误差统计信息不明确,且量测信息具有随机性和有限性的特点,提出了采用非等间隔并解决量测滞后的滤波算法,设计了相应的卡尔曼滤波算法和递推最小二乘算法.建立了INS/GIS组合导航数学模型,通过仿真分析对比了上述两种算法的滤波精度,结果表明,改进的卡尔曼滤波方法优于递推最小二乘估计方法,可有效提高导航精度.
Abstract:Focused on the ambiguity of the statistical information about GIS measurement error and the random, timedelay characteristics of the measurement output, this paper gives a filter algorithm for solving the problem derived from incoordinate interval and measurement delay. This paper designes the corresponding Kalman filter and the LS algorithm. Based on the INS/GIS integrated navigation mathematical model, the accuracy of the improved Kalman filter and the improved LS algorithm are analyzed. The simulation results verify the validity of the improved Kalman filter.