现代防御技术 ›› 2023, Vol. 51 ›› Issue (4): 116-125.DOI: 10.3969/j.issn.1009-086x.2023.04.015

• 仿真技术 • 上一篇    

基于MI-RRT*算法的路径规划研究

于强1,2(), 彭昭鸿2, 黎旦1, 李利彬1, 高艺成1   

  1. 1.哈尔滨工程大学 智能科学与工程学院, 黑龙江 哈尔滨 150000
    2.青岛哈尔滨工程大学创新发展中心, 山东 青岛 266000
  • 收稿日期:2022-06-21 修回日期:2022-12-06 出版日期:2023-08-28 发布日期:2023-09-01
  • 通讯作者: 于强
  • 作者简介:于强(1977-),男,辽宁省东港人。讲师,博士,研究方向为陀螺仪及导航技术、航行器路径规划、磁探测等方面。

Research of Path Planning Based on MI-RRT* Algorithm

Qiang YU1,2(), Zhaohong PENG2, Dan LI1, Libin LI1, Yicheng GAO1   

  1. 1.College of Intelligent Systems Science and Engineering, Harbin Engineering University, Harbin 266000, China
    2.Qingdao Innovation and Development Center of Harbin Engineering University, Qingdao 266000, China
  • Received:2022-06-21 Revised:2022-12-06 Online:2023-08-28 Published:2023-09-01
  • Contact: Qiang YU

摘要:

针对Informed-RRT(rapidly-exploring random tree)*算法收敛速度慢、优化效率低和生成路径无法满足实际需求等问题,开展了基于MI-RRT* (Modified Informed-RRT*)算法的路径规划研究,通过引入贪心采样和自适应步长的方法提高算法的收敛率,减少路径生成时间、降低内存占用;利用最小化Snap曲线优化的方法使路径平滑的同时动力也变化平缓,达到节省能量的效果,并提供实际可执行的路径。最后通过多组不同复杂度的实验环境表明,较Informed-RRT*算法MI-RRT*算法稳定性更高、所得规划路径平滑可执行,并且能够减少20%的迭代次数和25% 的搜索时间,得出在开阔以及密集环境中MI-RRT*算法较Informed-RRT*和RRT*算法有明显的优势。

关键词: Informed-RRT*算法, 贪心采样, 自适应步长, MI-RRT*, 最小化Snap曲线优化, RRT*算法

Abstract:

Aiming at the problems of the Informed-RRT(rapidly-exploring random tree)* algorithm, such as slow convergence speed, low optimization efficiency and inability to execute the generated path, path planning research based on MI-RRT* (modified informed-RRT*) algorithm is carried out. The method of greedy sampling and adaptive step size is introduced to improve the convergence rate of the algorithm, reduce the path generation time and the memory usage. Minimum Snap curve is used to make the path smooth and the power change smoothly, so as to achieve the effect of saving energy and the path to generate the executable. Several sets of different experimental environments are run to show that the MI-RRT* algorithm is more advantageous than the original algorithm, the resulting planned path is smooth executable and it can reduce the number of iterations by 20% and the search time by 25%. Compared with the open and dense environment, the MI-RRT* algorithm has obvious advantages over the Informed-RRT* ,RRT* algorithms.

Key words: Informed-RRT*(rapidly-exploring random tree) algorithm, reedy sampling, adaptive step size, modifiend informed-RRT*(MI-RRT*), minimum snap, RRT* algorithm

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