arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1601.06326cs.RO
收藏

基于采样的闭环预测最优运动规划算法

Sampling-based Algorithms for Optimal Motion Planning Using Closed-loop Prediction

Georgia Institute of Technology(佐治亚理工学院);Mitsubishi Electric Research Laboratories(三菱电机研究实验室)

Oktay Arslan, Karl Berntorp, Panagiotis Tsiotras

摘要:

微分约束下的运动规划,即运动动力学运动规划,是机器人学中的经典问题之一。目前,最先进的方法围绕流行的基于采样的算法的运动动力学变体,如快速探索随机树(RRT)。然而,仍然存在挑战,例如,如何在保证最优性的同时包括复杂的动态。如果开环动态是不稳定的,则通过控制空间中的随机采样的探索变得低效。我们描述了一种新的基于采样的算法,称为CL-RRT#,它利用了RRT#算法的思想和RRT算法的变体,该算法使用闭环预测生成轨迹。规划与闭环预测的想法,使我们能够处理复杂的不稳定的动态,并避免需要找到计算困难的转向程序。RRT#算法中提出的搜索技术允许我们通过搜索替代参考轨迹来提高解的质量。使用非完整系统的数值模拟表明所提出的方法的好处。

英文摘要:

Motion planning under differential constraints, kinodynamic motion planning, is one of the canonical problems in robotics. Currently, state-of-the-art methods evolve around kinodynamic variants of popular sampling-based algorithms, such as Rapidly-exploring Random Trees (RRTs). However, there are still challenges remaining, for example, how to include complex dynamics while guaranteeing optimality. If the open-loop dynamics are unstable, exploration by random sampling in control space becomes inefficient. We describe a new sampling-based algorithm, called CL-RRT#, which leverages ideas from the RRT# algorithm and a variant of the RRT algorithm that generates trajectories using closed-loop prediction. The idea of planning with closed-loop prediction allows us to handle complex unstable dynamics and avoids the need to find computationally hard steering procedures. The search technique presented in the RRT# algorithm allows us to improve the solution quality by searching over alternative reference trajectories. Numerical simulations using a nonholonomic system demonstrate the benefits of the proposed approach.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑