A Rhythmic Motion Control Method Inspired by Board Shoe Racing for a Weight-Bearing Exoskeleton
作者机构：State Key Laboratory of Robotics and SystemHarbin Institute of TechnologyHarbin 150001China
出 版 物：《Journal of Bionic Engineering》 (仿生工程学报（英文版）)
年 卷 期：2022年第19卷第2期
页 面：403-415页
核心收录：
学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 0402[教育学-心理学(可授教育学、理学学位）] 1002[医学-临床医学] 08[工学] 080202[工学-机械电子工程] 0802[工学-机械工程] 0811[工学-控制科学与工程] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：supported by the National Key R&D Program of China(Grant No.2018YFB1305400) the NSFC Shenzhen Robotics Research Center Project(U2013207)。
主 题：Exoskeleton robot Central pattern generator Walking control method
摘 要：To ensure the flexible walking of the weight-bearing exoskeleton robot,most researchers control the exoskeleton to follow the wearer’s movements and provide force to maintain the current dynamic state.However,due to the limitation of sensing information and computing power,it is difficult for the exoskeleton to provide the wearer reasonable and stable force only based on the dynamic model,especially in switching between swing phase and stance phase.Inspired by China’s traditional sport named board shoe racing,a walking control method based on the cooperation of the human and the exoskeleton is proposed in this paper for a lower-limb exoskeleton named PALExo.Under certain conditions,the exoskeleton itself can walk stably depending on the rhythm signals generated by the Central Pattern Generator(CPG).With certain initiative during walking,it can make proper adjustments according to the human movement.With the help of dynamic simulation software and Genetic Algorithm(GA),the optimized CPG parameters are obtained.Impedance control is introduced to increase the comfort of the wearer.The impedance parameters as well as the CPG parameters are tuned in real time based on feedback.The experiments were conducted with PALExo.The results demonstrate that PALExo can effectively assist the wearer walking with a 45-kg payload benefiting from the proposed method.
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