宽幅海岸带成像仪视轴指向设计  

Design of the Line-of-Sight Direction of the Wide-Swath Coastal Zone Imager

作　　者：郑君[1,2] 张晓敏 刘欢[1,2] 王超 曹宇泽 褚备[1,2] 张弈秋 王钰峣[1,2] 张孝弘 ZHENG Jun;ZHANG Xiaomin;LIU Huan;WANG Chao;CAO Yuze;CHU Bei;ZHANG Yiqiu;WANG Yuyao;ZHANG Xiaohong(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China;Key Laboratory for Advanced Optical Remote Sensing Technology of Beijing,Beijing 100094,China;DFH Satellite Co.Ltd.,Beijing 100094,China)

机构地区：[1]北京空间机电研究所,北京100094 [2]先进光学遥感技术北京市重点实验室,北京100094 [3]航天东方红卫星有限公司,北京100094

出　　处：《航天返回与遥感》2025年第2期72-85,共14页Spacecraft Recovery & Remote Sensing

摘　　要：为解决宽幅海岸带区域内高精度定向和精细化探测的需求,新一代海洋水色观测卫星海岸带成像仪采用前置大范围指向机构的成像技术,利用“步进电机转动+谐波齿轮减速器传动”的驱动和“霍尔效应数字开关电路+绝对式光电编码器”的遥测,通过逐次逼近式闭环控制,实现了精度优于半步距角的1000 km大幅宽范围的目标探测和在轨准确的视轴定位,完成了对热点地区的精确定位调查。在地面实验室试验中,海岸带成像仪视轴指向角度实现控制精度优于20″,测量精度优于10″,并根据在轨测试情况,充分验证了该视轴指向系统的可行性和健壮性。该设计具有定位精度高、可靠性高、安全性好及规模紧凑等特点,对宽幅海岸带定向精细化探测具有重要意义。To meet the demand of high-precision directional and detailed detection in a wide coastal zone,the new generation of ocean color observation satellites,the Coastal Zone Imager,employs the imaging technology featuring a front-mounted wide-range pointing mechanism.It utilizes a drive system consisting of"stepper motor rotation+harmonic gear reducer transmission"and a telemetry system incorporating"Hall effect digital switch circuit+absolute photoelectric encoder".Through successive approximation closed-loop control,it achieves a detection range of 1,000 km with an accuracy better than half a step angle,enabling accurate on-orbit line-of-sight positioning and precise surveying of hotspot areas.In ground laboratory tests,the Coastal Zone Imager achieved a control accuracy of better than 20 arcseconds and a measurement accuracy of better than 10 arcseconds for the line-of-sight pointing angle.The on-orbit tests fully verified the feasibility and robustness of this line-of-sight pointing system.This design is characterized by high positioning accuracy,high reliability,good safety,and compact scale,and is of great significance for directional and detailed detection in wide coastal zones.

关 键 词：视轴指向 宽幅探测 定位精度 闭环控制 海岸带区域 新一代海洋水色观测卫星 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]