Systems Engineering and Electronics ›› 2020, Vol. 42 ›› Issue (9): 1976-1987.doi: 10.3969/j.issn.1001-506X.2020.09.13

Previous Articles     Next Articles

Cooperative trajectory planning for UAV formation based onpath-speed decoupling

Honghai ZHANG1,*(), Xiaopeng QIAN1,2(), Xinwei WU3(), Hao LIU1(), Yu TIAN1(), Lichao WANG1()   

  1. 1. School of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
    2. Unit 94587of the PLA, Lianyungang 222000, China
    3. AVIC ATM System & Equipment Copporation Limited, Shanghai 200241, China
  • Received:2019-11-20 Online:2020-08-26 Published:2020-08-26
  • Contact: Honghai ZHANG E-mail:honghaizhang@nuaa.edu.cn;1205283936@qq.com;746037567@qq.com;hliu@nuaa.com;yut@nuaa.edu.cn;625463602@qq.com

Abstract:

Aiming at the problem of cooperative trajectory planning for unmanned aerial vehicle (UAV) formation in complex maneuvering situation, a preview adaptive trajectory planning method based on path-speed decoupling method is proposed. In the path planning stage, considering the maneuvering curvature restrictions of UAV turning motion, the Dubins curve is used as the basic substructure of the path. In order to obtain the optimal connection control point of the Dubins curve, a preview distance planning algorithm with adaptive prefollowing path characteristics is designed. In the velocity planning stage, aiming at the control parameterization and time discretization(CPTD) velocity planning method, a differential zone velocity planning method under rasterized airspace is proposed, which is shortened to DIPR. The simulation results show that the preview distance adaptive algorithm can effectively optimize the path. Compared with t he fixed preview distance method, the turning degree is reduced by an average 30.70%, and the tracking deviation is reduced by 16.41%, the path length is decreased by 10.87%. Compared with CPTD method, DIPR converges 30 generation earlier, and the convergence value increases by 10.67% in average. The formation time is reduced by an average of 15.4 s. The results are obtained faster and better, and the speed curve results are continuous and smooth.

Key words: unmanned aerial vehicle (UAV), formation, trajectory planning, safety interval, Dubins curve, rasterization

CLC Number: 

[an error occurred while processing this directive]