电讯技术
電訊技術
전신기술
TELECOMMUNICATIONS ENGINEERING
2014年
5期
574-577
,共4页
机载传感器%无引导搜索%顺序搜索%最优搜索策略
機載傳感器%無引導搜索%順序搜索%最優搜索策略
궤재전감기%무인도수색%순서수색%최우수색책략
airborne sensor%uncued search%sequential search%optimal search strategy
针对机载传感器搜索任务,将无引导搜索问题分为搜索区域目标出现概率未知和已知两种情况进行了讨论。在搜索区域仅有一个目标和忽略传感器搜索视场切换的前提假设下,在搜索时间最短的要求下,提出了一种最优搜索策略,即任一视场的搜索次数与该视场中目标出现概率的平方根成正比。并通过仿真实例表现了该搜索策略:未知目标出现概率的情况下是一种顺序搜索,而已知目标出现概率的情况下是优先、多次搜索目标出现概率较大视场的同时,还无遗漏的兼顾搜索其他视场。该策略使传感器尽快满足任务要求,缩减工作时间。
針對機載傳感器搜索任務,將無引導搜索問題分為搜索區域目標齣現概率未知和已知兩種情況進行瞭討論。在搜索區域僅有一箇目標和忽略傳感器搜索視場切換的前提假設下,在搜索時間最短的要求下,提齣瞭一種最優搜索策略,即任一視場的搜索次數與該視場中目標齣現概率的平方根成正比。併通過倣真實例錶現瞭該搜索策略:未知目標齣現概率的情況下是一種順序搜索,而已知目標齣現概率的情況下是優先、多次搜索目標齣現概率較大視場的同時,還無遺漏的兼顧搜索其他視場。該策略使傳感器儘快滿足任務要求,縮減工作時間。
침대궤재전감기수색임무,장무인도수색문제분위수색구역목표출현개솔미지화이지량충정황진행료토론。재수색구역부유일개목표화홀략전감기수색시장절환적전제가설하,재수색시간최단적요구하,제출료일충최우수색책략,즉임일시장적수색차수여해시장중목표출현개솔적평방근성정비。병통과방진실례표현료해수색책략:미지목표출현개솔적정황하시일충순서수색,이이지목표출현개솔적정황하시우선、다차수색목표출현개솔교대시장적동시,환무유루적겸고수색기타시장。해책략사전감기진쾌만족임무요구,축감공작시간。
For the airborne sensor search assignment, the problem of uncued search is discussed according to two cases which are based on the spatial unknown and known probability of target available in the search area. Under the assumptions that there is only one target available and the switching time between field-of-views is ignored, and under the shortest time requirement, an optimal search strategy that the number of scans for any field-of-view is proportional to the square root of its probability is proposed. The simulated results demonstrate the strategy for these two cases. It is a sequential search on the unknown probability of target available, and when the probability is known, it will lay more emphasis on the field-of-view bearing larger probability but it will still search without missing any of the other field-of-views. This strategy makes the sensor achieve assignment quickly and reduce operating time.