NDLI: Output feedback tracking control of electro-hydraulic servo systems

Content Provider	IEEE Xplore Digital Library
Author	Zhenying Zhao Lilong Cai
Copyright Year	1996
Description	Author affiliation: Dept. of Mech. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong (Zhenying Zhao)
Abstract	This paper presents a model-free robust/adaptive control scheme for tracking control of electrohydraulic servo systems using output feedback only. The Taylor expansion theory is used to enable the proposed controller to identify and feedback linearize the dynamics of a system online, and to compensate parameter variation and various disturbances in real time. As a result, the closed-loop system of the complicated electrohydraulic system behaves as a simple linear dominated system plus a small uncertainty residual. By properly designing the adaptive law of the robust gain, asymptotic stability and satisfactory performance of the closed-loop system can be achieved. The details of controller design and stability analysis are presented in the paper. The controller has been implemented on a plastic injection moulding machine to control the position of the mould-supporting movable platen. The results from experiments indicate that the proposed controller performs much better than the conventional PID feedback controller.
Starting Page	2713
Ending Page	2718
File Size	529491
Page Count	6
File Format	PDF
ISBN	0780335902
ISSN	01912216
DOI	10.1109/CDC.1996.573515
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-12-13
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Output feedback Control systems Servomechanisms Adaptive control Electrohydraulics Robust control Taylor series Linear feedback control systems Real time systems Uncertainty
Content Type	Text
Resource Type	Article

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