航天光学遥感成像半实物仿真系统研究  

Research on HIL simulation system for space optical remote sensing imaging

作　　者：李明譞 江刚武[1] 张锐[1] 张一[1] 

机构地区：[1]解放军信息工程大学,河南郑州450001

出　　处：《激光与红外》2017年第5期617-623,共7页Laser & Infrared

基　　金：国家自然科学基金资助项目(No.41471387)资助

摘　　要：航天光学遥感器的研究周期长、成本高,为了保证航天遥感卫星在轨成像性能,在卫星发射前,必须在地面进行深入可靠的仿真试验研究。本文建立了由六自由度机械臂为运动平台的航天光学遥感成像半实物仿真系统,首先建立坐标系模型并求取坐标转换参数,然后依据STK(System Tool Kit)软件生成星历数据,经坐标转换后输入到机械臂控制系统,最后根据TDI CCD相机的成像原理,控制机械臂使TDI CCD相机对三维地形沙盘线性推扫,从而获取线阵仿真影像。仿真结果表明,建立了正确有效的仿真坐标系,可快速、稳定、实时地模拟航天遥感对地推扫成像过程,且仿真影像中均匀分布的12个圆形靶标的圆度均优于0.95,证明仿真影像质量较高,可满足遥感目标的探测与识别仿真算法研究的需求,为航天光学遥感成像仿真系统的研究提供一定参考。Space optical remote sensor has the characteristics of long development cycle and high cost. Before the launch of the satellite, the simulation experiment must be carried out in detail on the ground in order to ensure the per- formance of aerospace remote sensing imaging system. An aerospace remote sensing imaging HIL simulation system is constructed, which uses six degrees of freedom manipulator as its motion platform. Firstly, the coordinate systems were established and the coordinate system transformation parameters were obtained. Then the ephemeris data which were generated by STK （system Tool Kit） software were input to the control system after coordinate transformation. Lastly, according to the imaging principle of TDI CCD camera, the target＇ s simulation image was obtained along with the movement of the manipulator by push-broom scanning three-dimensional terrain sand table. The results of simulation test show that the correct and effective simulation coordinate systems can fast, stably, and real-time simulate the process of aerospace remote sensing imaging in this system. The circularities of 12 circular targets uniformly distribu- ted in the simulation image are better than 0. 95, which proves that the quality of simulation image is higher, and the simulation image of terrain sand table could meet the demand of remote sensing target detection and research on simu- lation recognition algorithm,which provides a reference for the research on space optical remote sensing imaging simu- lation system.

关 键 词：半实物仿真 时间延时积分电荷耦合器件 六自由度机械臂 坐标转换 推扫成像 

分 类 号：TP722.4[自动化与计算机技术—检测技术与自动化装置]