Paper Info
Title
A novel pump-valve coordinated controlled hydraulic system for the lower extremity exoskeleton:
Abstract
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.
Year
DOI
Venue
2020
10.1177/0142331220930623
TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
Keywords
DocType
Volume
Lower extremity exoskeleton,hydraulic system,electro-hydrostatic actuator,pump-valve coordinated control,AMESim simulation
Journal
42.0
Issue
ISSN
Citations 
15
0142-3312
0
PageRank 
References 
Authors
0.34
0
5
Name
Order
Citations
PageRank
Jinlin Jiang100.34
Yu Wang251.67
Heng Cao311.42
Jun Zhu431.41
Xinbin Zhang500.34