Sun Ying, Wang Wenlu, Xu Manman, Huang Li, Shi Kangjing, Zou Chunlong, Chen Baojia
Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China.
Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
Sensors (Basel). 2023 Oct 5;23(19):8260. doi: 10.3390/s23198260.
Due to the increased employment of robots in modern society, path planning methods based on human-robot collaborative mobile robots have been the subject of research in both academia and industry. The dynamic window approach used in the research of the robot local path planning problem involves a mixture of fixed weight coefficients, which makes it hard to deal with the changing dynamic environment and the issue of the sub-optimal global planning paths that arise after local obstacle avoidance. By dynamically modifying the combination of weight coefficients, we propose, in this research, the use of fuzzy control logic to optimize the evaluation function's sub-functions and enhance the algorithm's performance through the safe and dynamic avoidance of obstacles. The global path is introduced to enhance the dynamic window technique's ability to plan globally, and important points on the global path are selected as key sub-target sites for the local motion planning phase of the dynamic window technique. The motion position changes after local obstacle avoidance to keep the mobile robot on the intended global path. According to the simulation results, the enhanced dynamic window algorithm cuts planning time and path length by 16% and 5%, respectively, while maintaining good obstacle avoidance and considering a better global path in the face of various dynamic environments. It is difficult to achieve a local optimum using this algorithm.
由于现代社会中机器人的使用日益增加,基于人机协作移动机器人的路径规划方法一直是学术界和工业界的研究课题。机器人局部路径规划问题研究中使用的动态窗口方法涉及固定权重系数的混合,这使得难以应对不断变化的动态环境以及局部避障后出现的次优全局规划路径问题。在本研究中,我们通过动态修改权重系数的组合,提出使用模糊控制逻辑来优化评估函数的子函数,并通过安全动态避障来提高算法性能。引入全局路径以增强动态窗口技术的全局规划能力,并选择全局路径上的重要点作为动态窗口技术局部运动规划阶段的关键子目标点。局部避障后运动位置发生变化,以使移动机器人保持在预期的全局路径上。根据仿真结果,增强后的动态窗口算法在面对各种动态环境时,分别将规划时间和路径长度缩短了16%和5%,同时保持了良好的避障能力并考虑了更好的全局路径。使用该算法很难实现局部最优。