纯方位角目标运动分析的可观测性研究

纯方位角目标运动分析的可观测性是纯方位角观测系统中的一个基本问题.只有解决了系统的可观测性,才能进行有效的目标定位及跟踪.从随机系统的角度分析了纯方位角观测系统的可观测性,引入状态参量的Fisher信息矩阵作为判断系统可观测性的依据,提出了完全不同于判定确定性系统可观测性的随机观测系统可观测性的判定方法.最后给出了一个静止目标纯方位角观测系统的实例,说明了该方法的有效性.

Observability of Bearings-only Target Motion Analysis

Observability of bearings-only target motion analysis is a basic problem in the bearings-only measurement system. An observable bearings-only measurement system is a precondition for locating and tracking targets effectively.This paper analyzes the observability of bearings-only measurement system from the viewpoint of stochastic systems, introduces Fisher information matrix as a criterion for determining observability and proposes a new method for determining observability of stochastic systems which is entirely different with the one for deterministic system. Finally an example of static target' s observability in bearings-only measurement system is given to illustrate the validity of this method.