应用STL模型的敏感器视场遮挡区域分析方法

摘要

针对卫星星表产品设备对敏感器视场的遮挡问题,提出了一种应用光固化立体造型术 (Stereo Lithographic,STL)的网格化模型的敏感器视场遮挡区域分析方法.此方法首先是将遮挡部件的三维模型转化为STL网格化模型文件,并提取出遮挡部件的 STL 网格化数据.然后将遮挡部件的STL网格化坐标数据进行处理后,与敏感器视场范围均转换成平面夹角数据.之后,则将遮挡部件的平面夹角数据与敏感器视场范围的平面夹角数据进行对比,分析敏感器视场被部件遮挡的情况,并绘制敏感器视场遮挡图,计算出遮挡率.相比以往方法,此方法有效提高了工作效率,便于工程设计,可作为卫星工作中敏感器视场遮挡分析的有效手段.%For the optical sensor being occluded by the parts on satellite,this paper proposes a method of occlusion analysis of satellite optical sensor using STL(Stereo Lithographic)models. First,three﹣dimensional model of the part on satellite is transformed into STL grid model files. And the STL grid data of part on satellite are extracted.Then the STL grid coordinator data of part on satellite and the view field of optical sensor are processed into angle data.Then the angle data of part on satellite and the view field of optical sensor are compared.Finally,the occlusion of optical sensor by part on satellite is analyzed.The pictures of the occlusion view field are plotted and the occlusion rate is computed.Compared with previous methods,this method improves the efficiency at work and it is easy to use in engineering design.It is an effective means for the occlu﹣sion analysis of the optical sensor view field on satellite.