文献类型：期刊文献

英文题名：A novel pump-valve coordinated controlled hydraulic system for the lower extremity exoskeleton

作者：Jiang, Jinlin[1];Wang, Yu[1];Cao, Heng[1];Zhu, Jun[2];Zhang, Xinbin[3]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Fudan Univ, Acad Engn & Technol, Shanghai, Peoples R China;[3]Shanghai Aerosp Control Technol Inst, Shanghai, Peoples R China

年份：2020

卷号：42

期号：15

起止页码：2872

外文期刊名：TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL

收录：;EI(收录号：20202608862278);WOS:【SCI-EXPANDED(收录号:WOS:000542308400001)】；

基金：The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the National Natural Science Foundation of China (Grant No. 91748110).

语种：英文

外文关键词：Lower extremity exoskeleton; hydraulic system; electro-hydrostatic actuator; pump-valve coordinated control; AMESim simulation

摘要：In order to reduce the weight and improve the energy efficiency of the lower extremity exoskeleton, a novel pump-valve coordinated controlled (PVCC) hydraulic system is presented. This hydraulic system only uses one electro-hydrostatic unit (EHU) and two valves to drive two hydraulic cylinders at the hip and knee of the lower extremity exoskeleton. The PVCC hydraulic system has the advantage of high energy conversion efficiency of the electro-hydrostatic actuator (EHA), which consists of one EHU and one hydraulic cylinder. To meet the requirements of the moment and speed of each joint of the exoskeleton, the proportional valve and on-off valve are added to adjust the flow into two hydraulic cylinders. The performance of EHU is tested by some hydraulic experiments, and the performance of the PVCC hydraulic system is analyzed by AMESim. The results show that the novel hydraulic system can only use one EHU to drive two hydraulic cylinders simultaneously under the premise of meeting the functional requirements of the exoskeleton.