Optimal Observer Trajectories For Bearings-only Tracking

Active detection systems, such as radar and sonar, had encountered more and more threaten in modern electronic warfare and information warfare. As the complement of active detection system, passive location and tracking system, which used electromagnetic wave emitted by target, had proved its merits of self-hiding and far-distance detecting and could be widely used in many applications. The observability of single-observer passive location was lower. Optimazition of trajectories could improve the observability and decrease the location error.This paper had mainly researched on optimazition of trajectories when bearings-only passive location system was tracking a target of constant-speed linear moving. In Chapter 2, the optimazition rules of minimum trace of the state error covariance matrix and maximum bearings rate were studied and simulated. A simple geometrical method to calculate optimized trajectories was advanced under the rule of maximum bearings rate. Chapter 3 brought forward a optimazition way that considered two-factors at the same time, included bearings rate and distance rate. They are normalized and weighted. This chapter simulated how the best coefficient was influenced by the condition of observation. The method that changing coefficient in the tracking was advanced. Chapter 4 researched the optimazition rule that considered position-error and velocity-error at one time. This chapter simulated how the best coefficient was influenced by the condition of observation under one step ahead optimal control strategy and multi-step ahead optimal control strategy.In a word, This paper had mainly researched on optimazition of trajectories for single-observer passive location, the proposed way for optimazition of trajectories got a better result in location, it may be useful to the later research.