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arXiv 2006.11218cs.ROcs.HC
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基于计算多准则优化的人机交互控制器设计

A Computational Multi-Criteria Optimization Approach to Controller Design for Physical Human-Robot Interaction

College of Engineering, Koc University(科奇大学工程学院);RACE UKAEA(英国原子能管理局RACE);Faculty of Engineering and Natural Sciences, Sabanci University(萨班哲大学工程与自然科学学院)

Yusuf Aydin, Ozan Tokatli, Volkan Patoglu, Cagatay Basdogan

摘要:

物理人机交互(physical human-robot interaction,pHRI)融合了操作者和机器人在物理交互任务中的优势,旨在提高任务性能。然而,实现安全和透明操作的交互控制器的设计是具有挑战性的,主要是由于这些目标的矛盾性质。知道达到完美的透明度实际上是不可能实现的,允许在这些目标之间更好地折衷的控制器是期望的。在本文中,我们提出了一个多准则优化框架,联合优化的稳定性鲁棒性和透明性的闭环pHRI系统的给定的相互作用控制器。特别是,我们提出了一个帕累托优化框架,允许设计师作出明智的决定,通过彻底研究稳定性鲁棒性和透明度之间的权衡。建议的框架包括搜索的离散控制器参数空间计算的Pareto前曲线和选择的控制器参数,通过研究这个权衡曲线,产生最大的可达到的透明度和稳定性鲁棒性。所提出的框架不仅导致最优控制器的设计,而且还可以在不同的交互控制器之间进行公平的比较。为了证明所提出的方法的实际使用,整数阶和分数阶导纳控制器的研究作为一个案例研究和分析和实验比较。实验结果验证了所提出的设计框架,并表明分数阶导纳控制器下实现的透明性高于整数阶,当两个控制器的设计,以确保相同的稳定性鲁棒性水平。

英文摘要:

Physical human-robot interaction (pHRI) integrates the benefits of human operator and a collaborative robot in tasks involving physical interaction, with the aim of increasing the task performance. However, the design of interaction controllers that achieve safe and transparent operations is challenging, mainly due to the contradicting nature of these objectives. Knowing that attaining perfect transparency is practically unachievable, controllers that allow better compromise between these objectives are desirable. In this paper, we propose a multi-criteria optimization framework, which jointly optimizes the stability robustness and transparency of a closed-loop pHRI system for a given interaction controller. In particular, we propose a Pareto optimization framework that allows the designer to make informed decisions by thoroughly studying the trade-off between stability robustness and transparency. The proposed framework involves a search over the discretized controller parameter space to compute the Pareto front curve and a selection of controller parameters that yield maximum attainable transparency and stability robustness by studying this trade-off curve. The proposed framework not only leads to the design of an optimal controller, but also enables a fair comparison among different interaction controllers. In order to demonstrate the practical use of the proposed approach, integer and fractional order admittance controllers are studied as a case study and compared both analytically and experimentally. The experimental results validate the proposed design framework and show that the achievable transparency under fractional order admittance controller is higher than that of integer order one, when both controllers are designed to ensure the same level of stability robustness.

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。

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