This invention relates to a navigation method for
underwater unmanned vehicles (UUVs), comprising the following steps: acquiring data from multiple sensors and performing spatiotemporal synchronization,
feature extraction, and data fusion preprocessing; defining the
underwater operating area as a
directed graph, with edge weights determined based on
terrain complexity, obstacle risk, and
water flow influence; based on the
directed graph, employing an improved A*
algorithm for global path planning and a fast exploratory
random tree algorithm for local path planning and dynamic
obstacle avoidance; assessing the environmental state considering aquatic environmental parameters,
water flow characteristics, and topographic changes; and adjusting the navigation strategy using a deep
reinforcement learning algorithm, with the navigation strategy adjustment objective function as the optimization goal, based on the environmental assessment results and the UUV's own state. Compared with existing technologies, this invention offers advantages such as improved navigation accuracy, reliability, and adaptability of
underwater UUVs in complex underwater environments.