The dynamic obstacles during the inspection process of intelligent robots result in discontinuous accessibility conditions for the inspection path, leading to abrupt changes in the feasible domain of the path and difficulty in obtaining feasible solutions for reconstructing the path, thereby reducing the smoothness of turning in the inspection path planning. To this end, an intelligent robot adaptive inspection path grid map neighborhood search algorithm is proposed. Adopting the grid map method to model the inspection environment, and defining the feasible path domain through the boundary condition processing mechanism. Introducing a turning cost function to improve the A* algorithm, using a grid map feasible region as the inspection environment model, to generate a preliminary smooth inspection path for turns. Aiming at the failure problem caused by path mutations in dynamic environments, a feasible region dynamic reconstruction method for inspection paths based on adaptive large-scale neighborhood search is proposed. The destruction operator is used to remove some inspection tasks and generate incomplete paths, and the repair operator is introduced to reorganize inspection tasks. Combined with the variable neighborhood descent search strategy, the solution space is deeply explored. The local optimization of the preliminary global inspection path is achieved through the adaptive neighborhood operator scoring and selection mechanism. The experimental results show that the algorithm can successfully avoid dynamic and static obstacles in grid maps and achieve intelligent robot inspection path planning. The inspection path length is relatively short, and the path optimization degree, turning smoothness coefficient, global search ability, and environmental adaptability scores are 95.24%, 0.917, 0.764, and 91.45, respectively.
在机器人巡检路径栅格地图邻域搜索研究中,尽管已经完成了机器人全局巡检转弯平滑路径规划,但仍存在动态环境下路径可行域频繁突变导致原有路径失效的问题,以及因环境复杂性和不确定性带来的新障碍物或通行区域变化难以实时捕捉的挑战[14,15]。这些问题使机器人难以仅凭规划后的路径完成巡检任务。因此,通过自适应大规模邻域搜索(Adaptive large neighborhood search, ALNS)技术在改进A*算法的基础上,进一步进行智能机器人巡检路径的局部优化,引入破坏算子、修复算子、变邻域下降搜索算子以及自适应邻域算子评分与选择机制,进一步开展自适应邻域搜索的巡检路径可行域重构,以有效应对动态环境下巡检路径可行域的频繁突变,从而实时调整和优化路径,确保巡检任务的顺利进行。
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