中文摘要：

针对船舶定位,提出一种基于差分进化机理的目标方位估计方法。首先,将多变异策略和优劣淘汰制引入到差分进化算法中;其次,用新的差分进化机理优化估计波达方位的似然目标函数,从而达到估计目标船舶方位的目的;最后,进行源信号服从正则分布、非正则分布和混合类型的仿真试验。试验结果表明：该方法不仅能有效估计目标船舶的波达方位,而且对噪声具有比其他传统方法更好的鲁棒性。

英文摘要：

A target bearing estimation method based on the differential evolution mechanism is introduced for a ship to determine the position of a target.The multi-mutation strategy and discarding mechanism are integrated into the differential evolution algorithm.The maximum-likelihood estimation of the Direction Of Arrival（DOA） of target-ships is achieved with the improved differential evolution algorithm.Simulation results prove that the proposed method is of better robustness than the conventional methods.