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星敏感器光学系统及成像阵列易受太阳和月亮强光干扰.针对弹载捷联星敏感器提出一种规避强光的解析几何方法.通过天文公式解算出观星时刻太阳、月亮矢量,将其转换到当地地理坐标系下;将太阳、月亮方位、地心指向和星敏感器圆视场的几何分布关系划分为3种类型,并结合星敏感器遮光罩太阳月亮规避角参数,分别建立矢量公式求解星敏感器光轴的指令指向;利用STK仿真软件进行算法验证,选择任意时间段并设定星敏感器光轴指向,经本算法解算的光轴指令指向均可成功规避太阳月亮和地平.该算法可实现星敏感器光学系统的自主保护、观星窗口的选择,可以通过姿态机动实现太阳和月亮的规避和有效星光观测.
The star sensor optical system and the imaging array are easily disturbed by the sun and the moon glare.Aiming at the analytic geometry method of avoiding the glare for the missile strapdown star sensor, the solar and moon vectors are solved by the astronomical formula Which is transformed into the local geographic coordinate system. The geometrical distribution of solar, moon azimuth, geocentric orientation and star sensor circular field of view is divided into three types, combined with the solar moon evasion angle parameters of the star sensor sunshade, respectively Vector formula to solve the pointing direction of star sensor optical axis; using STK simulation software to verify the algorithm, select any time period and set the star sensor optical axis, the algorithm can calculate the optical axis command can successfully avoid the sun moon And horizon.This algorithm can realize the autonomic protection of the star sensor optical system and the selection of the stargazing window, which can avoid the sun and the moon and the effective star observation by the attitude maneuver.