机载传感器无引导搜索策略研究

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。

Study on uncued search strategy for airborne sensor

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.