星载观测平台的视线测量误差分配

Error Distribution of Line-of-Sight Measurement on the Satellite Borne Observation Platform

面向光学卫星观测平台的视线测量精度需求,研究了一种基于区间分析理论的误差分配方法.基于先进的卫星、转台、相机结构,建立了惯性系下空间相机与目标间的视线矢量测量模型及测量误差模型.根据区间分析理论,给出了误差灵敏度的评价方法.根据星载观测平台的工作空间,得到了各项误差源在三个轴向上的全域最大灵敏度.以全域最大灵敏度为权重系数,建立了星载观测平台视线测量的误差分配模型,通过遗传算法将13项误差源的可行区间松弛致最大.Monte Carlo仿真验证了该误差分配方法的有效性,该方法也同样适用于机载、车载等观测平台的误差分配研究.

Focusing on the requirement of Los measurement accuracy for the optical satellite observation platform,an error distribution method is studied based on interval analysis theory. Based on the structure of advanced satellite,turntable and camera,the line-of-sight vector measurement model and measurement error model between the space camera and the target are established. According to the interval analysis theory,the evaluation method of the error sensitivity is presented. According to the working space of satellite observation platform,the global maximum sensitivity of the error source in three-axis is get. Setting the global maximum sensitivity as weight coefficient,the error distribution model of the line-of-sight measurement of satellite borne observation platform is established. The maximum of 13 error sources is reached by genetic algorithm. Monte Carlo simulation shows that the method is effective,and the method is also applicable to the error distribution of the airborne,vehicle and other observation platforms.