Abstract: Based on the characteristic of UAV reconnaissance and location mission, the calculation models of UAV reconnaissance region and DOA location error are established. The relationship between location precision and UAV navigation tendency, distance between target radar and UAV, location time is described. Then, the algorithm for UAV path autonomous correction based on location precision is given. The main idea is to timely and automatically correct the UAV path in order to improve the location precision, decrease the location time and avoid the threat area based on the obtained position information of target radar and the performance parameter of UAV in the process of flying. At last, the result of simulation shows that the location time is decreased and the location precision and the successful rate of location are improved.

Key words: Unmanned Aerial Vehicle（UAV）, location precision, Direction Of Arrival（DOA） location, reconnaissance path, autonomous correction

摘要： 根据电子对抗无人机侦察定位的特点，建立了无人机可侦察区域计算模型和定位误差计算模型，描述了定位精度与无人机飞行航向、目标雷达的距离以及定位时间的关系。在此基础上，从提高无人机定位精度，缩短定位时间的角度出发，提出无人机在侦察飞行过程中，依据侦察获得的目标雷达位置信息，结合无人机性能参数，适时自主修正飞行航路，从而在最短的时间内获得最精确的目标位置信息，并且可以避开飞行威胁区。仿真结果表明该修正算法能够有效地缩短定位时间，提高定位精度以及定位成功率。

关键词: 无人机, 定位精度, 测向交叉定位, 侦察航路, 自主修正