Stable pushing in narrow passage environment using a modified hybrid A* algorithm

IF 5.9 2区 工程技术 Q1 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE
Kuan-Cheng Kuo, Kuei-Yuan Chan
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Abstract

Pushing is a fundamental ability in mobile robotics for transporting objects when grippers are not applicable. A successful “box-pushing” requires good coordination between model prediction, pushing strategy, and motion planning, therefore presents a well-known challenge in mobile robot transportation community. However, current research often focuses on local planning for altering push direction, while global planning remains inadequate. This can lead to inefficient pushing trajectories, especially in narrow passages where robots may unintentionally push the box into a dead end due to the lack of robust global path. To address this, we propose the use of stable pushing as an effective technique and develop a unique global planning approach based on the hybrid A* algorithm. We enhance the hybrid A* algorithm by modifying the node expansion approach and incorporating a mechanism for predicting push direction, enabling the system to adapt to changing push side behavior and discover optimal pathways. Extensive simulations validate our system’s effectiveness in handling complex scenarios with limited passageways. As a result, our method significantly improves the robot’s capability to generate superior global paths for box-pushing, mitigating wasteful trajectories and enhancing overall performance.

Abstract Image

使用改进的混合 A* 算法在狭窄通道环境中稳定推进
推箱子是移动机器人技术中的一项基本能力,用于在抓手不适用的情况下运输物体。成功的 "推箱 "需要模型预测、推送策略和运动规划之间的良好协调,因此是移动机器人运输领域的一个众所周知的挑战。然而,目前的研究通常侧重于改变推送方向的局部规划,而全局规划仍然不足。这会导致推送轨迹效率低下,尤其是在狭窄通道中,由于缺乏稳健的全局路径,机器人可能会无意中将箱子推入死胡同。为了解决这个问题,我们提出使用稳定推送作为一种有效的技术,并在混合 A* 算法的基础上开发了一种独特的全局规划方法。我们通过修改节点扩展方法和加入预测推动方向的机制来增强混合 A* 算法,从而使系统能够适应不断变化的推动方行为并发现最优路径。大量的模拟验证了我们的系统在处理通道有限的复杂场景时的有效性。因此,我们的方法极大地提高了机器人为推箱产生卓越全局路径的能力,减少了浪费轨迹,提高了整体性能。
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来源期刊
Journal of Intelligent Manufacturing
Journal of Intelligent Manufacturing 工程技术-工程:制造
CiteScore
19.30
自引率
9.60%
发文量
171
审稿时长
5.2 months
期刊介绍: The Journal of Nonlinear Engineering aims to be a platform for sharing original research results in theoretical, experimental, practical, and applied nonlinear phenomena within engineering. It serves as a forum to exchange ideas and applications of nonlinear problems across various engineering disciplines. Articles are considered for publication if they explore nonlinearities in engineering systems, offering realistic mathematical modeling, utilizing nonlinearity for new designs, stabilizing systems, understanding system behavior through nonlinearity, optimizing systems based on nonlinear interactions, and developing algorithms to harness and leverage nonlinear elements.
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