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http://dx.doi.org/10.7736/KSPE.2016.33.10.837

A Feedback Control of Pump-Controlled Electro-Hydrostatic Actuation System  

Ryu, Jae-Kwan (Mechanical R&D Laboratory, LIGNex1 Co., Ltd.)
Seo, Hyung-Tae (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
Journal of the Korean Society for Precision Engineering / v.33, no.10, 2016 , pp. 837-843 More about this Journal
Abstract
This paper presents a position control strategy for a pump-controlled electro-hydrostatic actuator (EHA) using feedforward control with disturbance compensation. As the disturbance observer is used to estimate nonlinear dynamics of EHA, which has valve-opening conditionals, as well as external disturbances, an additional feedforward control is adopted to achieve rapid response. The effectiveness of the proposed control strategy is verified through experiment using an EHA test bench. The proposed controller shows better tracking performance compared with a conventional PID controller.
Keywords
Pump-Controlled hydraulic system; Disturbance observer; Powered exoskeleton;
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