[1] [1] KALYANAM K,CHANDLER P,PACHTER M,et al.Opti-mization of perimeter patrol operations using unmanned aerial vehicles[J］.Journal of Guidance,Control,and Dynamics,2012,35(2):434-441.

[4] [4] LI Q R,WEI C,WU J,et al.Improved PRM method of low altitude penetration trajectory planning for UAVs[C］//Proceeding of the IEEE Chinese Guidance,Navigation and Control Conference,2014:2651-2654.

[8] [8] OZALP N,SAHINGOZ O K.Optimal UAV path planning in a 3D threat environment by using parallel evolutionary algorithms[C］//Proceeding of the IEEE International Conference on Unmanned Aircraft Systems,2013:308-317.

[11] [11] CUEVAS E,CIENFUEGOS M,ZALDIVA D R,et al.A swarm optimization algorithm inspired in the behavior of the social spider [J］.Expert System with Applications, 2013,40(16):6374-6384.

[13] [13] HART P E,NILSSON N J,RAPHAEL B.A formal basis for the heuristic determination of minimum cost paths[J］.IEEE Transactions on Systems Science and Cybernetics,1968,4(2):100-107.