[2] [2] FREW E W.Cooperative standoff tracking of uncertain moving targets using active robot networks［C］//IEEE International Conference on Robotics & Automation,2007:3277-3282.

[4] [4] ABIN A P,ASHWINI R.Curvature constrained Lyapunov vector field for stand-off target tracking［J］.Journal of Guidance,Control and Dynamics,2017,40(10):2725-2735.

[5] [5] FREW E W,LAWRENCE D,MORRIS S.Coordinated standoff tracking of moving targets using Lyapunov guidance vector fields［J］.Journal of Guidance,Control & Dynamics,2008,31(2):290-306.

[6] [6] DEREK K,RANDAL B.UAV splay state configuration for moving targets in wind［C］//Proceedings of the 7th International Conference on Cooperative Control and Optimization,2007:109-128.

[7] [7] JIANG F,SWINDLEHURST A L.Optimization of UAV heading for the ground-to-air uplink［J］.IEEE Journal on Selected Areas in Communications,2012,30(5):993-1005.

[8] [8] YANG J,ZHAO H Y,LUO X Y.RSSI-based heading control for robust long-range aerial communication in UAV networks［J］.IEEE Internet of Things Journal,2019,6(2):1675-1689.

[9] [9] CHENG D,WANG J,HU X.An extension of Lasalles invariance principle and its application to multi-agent consensus［J］.IEEE Transactions on Automatic Control,2008, 53(7):1765-1770.