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http://dx.doi.org/10.5302/J.ICROS.2016.15.0210

H∞ Observer Design for Detecting Internal Oil Leakage in a Hydraulic Cylinder  

Jee, Sung Chul (Korea Institute of Robot and Convergence)
Kang, Hyungjoo (Korea Institute of Robot and Convergence)
Lee, Mun-Jik (Korea Institute of Robot and Convergence)
Li, Ji-Hong (Korea Institute of Robot and Convergence)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.22, no.2, 2016 , pp. 117-125 More about this Journal
Abstract
This paper presents the internal oil leakage detection problem for a hydraulic double-rod cylinder. We represent the dynamics of the hydraulic cylinder as a convex combination of linear equations. To detect oil leakage, we propose a model-based fault detection observer design scheme. The observer is designed to be robust against disturbance. Sufficient design conditions are derived in the form of linear matrix inequalities. A numerical example is provided to verify the proposed techniques.
Keywords
oil leakage; fault detection; hydraulic cylinder; model-based observer; linear matrix inequality;
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