基于地球敏感器的地影下自旋卫星起旋转速确定  

Calculation of the Spinning Satellite's Initialization Spinning Rate under Shadow

作　　者：陶景桥[1] TAO Jingqiao(Beijing Institute of Control Engineering,Beijing 100090,China)

机构地区：[1]北京控制工程研究所,北京100090

出　　处：《空间控制技术与应用》2019年第1期60-65,共6页Aerospace Control and Application

摘　　要：自旋卫星在星箭分离后必须及时可靠起旋,起旋转速确定是判断卫星是否起旋的前提条件.星箭分离时,采用太敏进行转速确定是最可靠最直接的方法,但在某些情况下,由于发射窗口的限制,导致卫星在地影期星箭分离,给起旋转速的确定提出了新问题.自旋卫星除了太敏外,通常还配备了地敏和加计作为姿态敏感器.加计用于测量自旋体的章动,如果起旋后的章动不明显,就无法测量周期,存在一定的不确定性.地敏一般用于同步轨道,在星箭分离时轨道高度仅有几百公里,将导致线路中的计数器溢出,给整个转速确定链路带来困难.本文提出的地敏测试方法,在计数器溢出多地中情况下,采用周期合成的方法计算自旋周期.本方法已成功应用于风云二号09星,同时可以为地敏在不同轨道条件下的应用提供参考.The spinning satellite must actively rotate after satellite-rocket separation,so the calculation of the spinning rate is the premise to judge the spin of the satellite.The sun sensor is the most effective method to calculate the spinning rate after satellite-rocket separation,but it is disabled when the satellite-rocket separation is under shadow,which is a new question for the calculation of the spinning rate.There are also earth sensor and acceleration sensor on the spinning satellite.The acceleration sensor is used for the nutation measure;if the nutation motion is weak,it cannot feel the cycle of the sine signal,so it is uncertain for the spinning rate calculation.Earth sensor is usually used on synchronous orbit;but when satellite-rocket separation happens,the orbit height is too low and the counter will overflow.The method in this text uses the cycle integration to calculate the spinning rate when the counter overflows.This method is used on FY-2(09)satellite,and it is also a reference for the application of the earth sensor in different orbit.

关 键 词：地影 自旋卫星 起旋转速确定 风云二号 

分 类 号：V44[航空宇航科学与技术—飞行器设计]