poor rationality and vulnerability to interference of the collaborative path planning for unmanned aerial vehicle (UAV) swarm are caused by the dense distribution diverse types of obstacles and the strong electromagnetic interference in ultra-low altitude electromagnetic threat zone. An improved pigeon-inspired optimization (PIO) algorithm is proposed to enhance the flight safety and combat effectiveness of UAVs. The characteristics of ultra-low altitude electromagnetic threat aone are analyzed
and multiple types of obstacles in ultra-low altitude electromagnetic threat zone are modeled. The elite learning factor and local search strategy are introduced in different stages of PIO algorithm to improve the convergence speed and global search ability of the improved algorithm. Simulation experiments and virtual scene experiments are conducted to verify the presented method. The results indicate that the proposed algorithm has better global search capability and faster convergence speed. It can provide support for safe and effective path planning of UAVs in ultra-low altitude electromagnetic threat zone.
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