arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.07967cs.ROcs.AI
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一种用于腿足运动可行性保证的高效范式

An Efficient Paradigm for Feasibility Guarantees in Legged Locomotion

Istituto Italiano di Tecnologia(意大利理工学院);University of Oxford(牛津大学)

Abdelrahman Abdallah, Michele Focchi, Romeo Orsolino, Claudio Semini

AI总结:

本文提出一种高效范式,通过改进可行区域同时保证动态平衡、关节力矩与运动学限制,并利用质心可达区域算法和规划策略生成可行轨迹,在HyQ和Aliengo机器人上验证了有效性。

摘要:

为腿足系统在任意地形上开发生成可行的身体轨迹是一项具有挑战性的任务。在本文中,我们提出了一种范式,能够以高效的方式设计可行的质心(CoM)和身体轨迹。在我们之前的工作[1]中,我们引入了二维可行区域的概念,即当质心的投影位于所提出的容许区域内时,静态平衡和关节力矩限制的满足都能得到保证。在这项工作中,我们提出了改进可行区域的一般性表述,该区域在保证动态平衡的同时,还能高效地满足关节力矩和运动学限制。为了纳入运动学限制的可行性,我们引入了一种计算质心可达区域的算法。此外,我们提出了一种高效的规划策略,利用改进的可行区域来设计可行的质心和身体姿态轨迹。最后,我们通过在90 kg液压驱动四足机器人(HyQ)和21 kg Aliengo机器人上的仿真与实验,验证了改进可行区域的能力以及所提规划策略的有效性。

英文摘要:

Developing feasible body trajectories for legged systems on arbitrary terrains is a challenging task. In this paper, we present a paradigm that allows to design feasible Center of Mass (CoM) and body trajectories in an efficient manner. In our previous work [1], we introduced the notion of the 2D feasible region, where static balance and the satisfaction of joint torque limits were guaranteed, whenever the projection of the CoM lied inside the proposed admissible region. In this work we propose a general formulation of the improved feasible region that guarantees dynamic balance alongside the satisfaction of both joint-torque and kinematic limits in an efficient manner. To incorporate the feasibility of the kinematic limits, we introduce an algorithm that computes the reachable region of the CoM. Furthermore, we propose an efficient planning strategy that utilizes the improved feasible region to design feasible CoM and body orientation trajectories. Finally, we validate the capabilities of the improved feasible region and the effectiveness of the proposed planning strategy, using simulations and experiments on the 90 kg Hydraulically actuated Quadruped (HyQ) and the 21 kg Aliengo robots.

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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