Disturbance observer based feedback linearization control for electro-hydraulic servo systems

Title
Disturbance observer based feedback linearization control for electro-hydraulic servo systems
Other Titles
전기 유압 서보 시스템의 비선형 외란 관측기 기반 피드백 선형화 제어
Authors
정정주
Keywords
Electro-hydraulic servo systems; Disturbance observer; Feedback linearization
Issue Date
2015-02
Publisher
Korean Institute of Electrical Engineers
Citation
Transactions of the Korean Institute of Electrical Engineers, v. 64, NO 2, Page. 297-303
Abstract
We propose a disturbance observer(DOB) based feedback linearization control to improve position tracking performance in the presence of disturbance. The proposed method consists of a disturbance observer and a feedback linearization controller. The disturbance observer is designed to estimate the load force disturbance in electro-hydraulic systems. An auxiliary state variable is proposed in order to avoid amplification of the measurement noises in the disturbance observer. Using the estimated disturbance enables the Electro-hydraulic servo systems(EHS) dynamics to be changed into feedback linearization from. In order to compensate for the disturbance and to track the desired position, the feedback linearization based controller is proposed. The proposed method has a simple structure which can easily be implemented in practice. As a result, the proposed method improves the position tracking performance in the presence of disturbance. Its performance is validated via simulations. © The Korean Institute of Electrical Engineers.
URI
http://www.dbpia.co.kr/Journal/ArticleDetail/NODE06140196http://hdl.handle.net/20.500.11754/22378
ISSN
1975-8359; 2287-4364
DOI
http://dx.doi.org/10.5370/KIEE.2015.64.2.297
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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