Overview of Research on 3D Path Planning Methods for Rotor UAV

With the continuous development of UAV technology, autonomous path planning methods suitable for UAVs are also evolving. In complex environments, UAVs not only need to consider the dynamics and time constraints, but also find the best and collision-free path. Although many researchers have conducted research on UAV path planning, there is a lack of comprehensive investigation and intuitive display of UAV path planning in a three-dimensional complex unknown environment. This article comprehensively analysis the path search algorithm and trajectory optimization method for UAVs in a three-dimensional environment, classifies them and compares them for each category, analyses the advantages and disadvantages of these methods.