ZHENG Zhengang, LI Xinkai, MENG Yue, et al. Three-dimensional Path Planning of UAVs Based on Adaptive Alternating Dual-target Deviation RRT* in Complex Low-altitude Airspace[J]. Acta Armamentarii, 2026, 47(1): 250310.
DOI:
ZHENG Zhengang, LI Xinkai, MENG Yue, et al. Three-dimensional Path Planning of UAVs Based on Adaptive Alternating Dual-target Deviation RRT* in Complex Low-altitude Airspace[J]. Acta Armamentarii, 2026, 47(1): 250310. DOI: 10.12382/bgxb.2025.0310.
Three-dimensional Path Planning of UAVs Based on Adaptive Alternating Dual-target Deviation RRT* in Complex Low-altitude Airspace
The path planning requirements of unmanned aerial vehicles (UAVs) in c
omplex three-dimensional building environments under the background of the low-altitude economy are studied. An improved sampling-Tree based bidirectional rapidly-exploring random tree algorithm (ST-BA-RRT
*
) is proposed. During the sampling stage
the proposed algorithm uses the ellipsoidal sampling in a three-dimensional environment
suppresses the expansion of the random tree into the obstacle area in conjunction with the dual-target bias strategy
and guides it to grow towards the target directionally. During the expansion stage
the adaptive alternating exploration and improved artificial potential field auxiliary strategies are applied to enhance the algorithm's environmental adaptability and local obstacle avoidance ability. During the collision detection stage
a new cost function is designed to reduce the frequency of obstacle inspections and optimize the planning time. For the connectivity processing
the bidirectional random sampling is used to improve the planning efficiency. Finally
the
β
-spline function is used to smooth the path. The experimental results show that the path generated by the ST-BA-RRT
*
algorithm is shorter and smoother than those generated by the existing algorithms
and the average path planning time is reduced by 35%. The proposed algorithm has significant advantages in terms of path quality and environmental adaptability
efficiently generate the optimized flight trajectories
and meets the path planning requirements of UAVs in complex three-dimensional building environments.
关键词
Keywords
references
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