中国空间科学技术
中國空間科學技術
중국공간과학기술
CHINESE SPACE SCIENCE AND TECHNOLOGY
2014年
2期
62-68
,共7页
敏捷卫星%任务规划%扫描条带%启发式规则
敏捷衛星%任務規劃%掃描條帶%啟髮式規則
민첩위성%임무규화%소묘조대%계발식규칙
Agile satellite%Scheduling%Linescan stripe%Heuristic rule
敏捷成像卫星可以实现利用三轴姿态机动所形成的推扫成像模式,同时可以在机动过程中同步成像。在敏捷卫星成像任务的基础上,建立考虑推扫成像模式的敏捷卫星任务规划模型。通过高斯投影建立球面直线扫描条带的数学生成模型,并利用Matlab现有函数进行优化解算;由于模型解算的复杂性,将整体规划问题分为两层子问题分别进行处理,在条带任务分配中,设计了适用于计算机计算的含有条带分配策略的解算算法;在上层规划中,基于推扫成像的双向扫描特性,设计了基于启发式规则的敏捷卫星任务规划算法;之后,将不可规划条带拆作孤立点目标进行处理,最后通过再合成处理完成整体规划。仿真结果表明,文章所设计的算法可以有效处理实际情况下的敏捷卫星推扫成像任务规划问题。
敏捷成像衛星可以實現利用三軸姿態機動所形成的推掃成像模式,同時可以在機動過程中同步成像。在敏捷衛星成像任務的基礎上,建立攷慮推掃成像模式的敏捷衛星任務規劃模型。通過高斯投影建立毬麵直線掃描條帶的數學生成模型,併利用Matlab現有函數進行優化解算;由于模型解算的複雜性,將整體規劃問題分為兩層子問題分彆進行處理,在條帶任務分配中,設計瞭適用于計算機計算的含有條帶分配策略的解算算法;在上層規劃中,基于推掃成像的雙嚮掃描特性,設計瞭基于啟髮式規則的敏捷衛星任務規劃算法;之後,將不可規劃條帶拆作孤立點目標進行處理,最後通過再閤成處理完成整體規劃。倣真結果錶明,文章所設計的算法可以有效處理實際情況下的敏捷衛星推掃成像任務規劃問題。
민첩성상위성가이실현이용삼축자태궤동소형성적추소성상모식,동시가이재궤동과정중동보성상。재민첩위성성상임무적기출상,건립고필추소성상모식적민첩위성임무규화모형。통과고사투영건립구면직선소묘조대적수학생성모형,병이용Matlab현유함수진행우화해산;유우모형해산적복잡성,장정체규화문제분위량층자문제분별진행처리,재조대임무분배중,설계료괄용우계산궤계산적함유조대분배책략적해산산법;재상층규화중,기우추소성상적쌍향소묘특성,설계료기우계발식규칙적민첩위성임무규화산법;지후,장불가규화조대탁작고립점목표진행처리,최후통과재합성처리완성정체규화。방진결과표명,문장소설계적산법가이유효처리실제정황하적민첩위성추소성상임무규화문제。
The agile satellite could achieve the linescan imaging model with the ability of three-axis-maneuvering , w hile imaging synchronously during the maneuvering . Based on the imaging agile satellite task , the model of the problem of scheduling agile earth observing satellite (AEOS) with the linescan imaging was established . Using the Gauss projection , the preliminary method of the linescan strip was established ,and solved by the existing algorithms in the Matlab . Because of the complexity of the model , the solution strategy of the hierarchical optimization was designed .During the sub-problem , generating the linescan stripe with groups , the solution method can be solved easily . In the upper scheduling problem , according to the two directions of the stripe , the hierarchical optimization based on heuristic rule was designed to solve the problem .Then ,turning the stripes that could not be scheduled into the point target , the whole scheduling was completed with the second-time-scheduling . The simulation shows that the algorithm can solve the actual problem of the scheduling of the linescan imaging agile satellite .