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http://dx.doi.org/10.7839/ksfc.2017.14.4.017

Comparison of Force Control Characteristics between Double-Rod and Single-Rod Type Electro-Hydrostatic Actuators (II): Back-Drivability  

Kim, Jong Hyeok (Aerospace & Mechanical Engineering, Graduate School, Korea Aerospace University)
Hong, Yeh Sun (Aerospace & Mechanical Engineering, Korea Aerospace University)
Publication Information
Journal of Drive and Control / v.14, no.4, 2017 , pp. 17-22 More about this Journal
Abstract
In this study, the back-drivability of the single-rod and double-rod type EHAs (Electro-Hydrostatic Actuators) was compared by computer simulation and experiments. The back-drivability of EHAs exhibit non-linear behavior like their force tracking performance. In case of the double-rod type EHA, the back-drivability was mostly influenced by the bulk modulus of oil that changes with the working pressure due to entrapped air. The back-drivability of the single-rod type EHA was directly affected by the operation states of its pilot-operated check valves, while the asymmetrical piston geometry and the non-linear bulk modulus of oil also made the dynamic response in building up the cylinder pressure dependent on the operating conditions.
Keywords
Electro-hydrostatic Actuator; Double-rod type EHA; Single-rod type EHA; Force Control; Dynamic response;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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