NDLI: Diagnosis Method for Valve-Controlled Hydraulic Cylinder Leakage Based on Subspace Identification

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Guo, Junxia Tao, Jianfeng Li, Lin Liu, Chengliang
Copyright Year	2018
Abstract	This paper proposes a fault diagnosis method based on subspace identification for the leakage fault detection of valve-controlled hydraulic cylinders. Firstly, the state-space model for the system is established, in which the external force on the piston of the hydraulic cylinder is selected as input signal, and the pressure of the two chambers, displacement and velocity of piston rod are chosen as state variables. Then, the estimation value of specific elements of the system matrix can be obtained in terms of the subspace identification theory. On this basis, the existence, type and level of the leakage fault are determined. Finally, the numerical simulation is conducted through MATLAB-Simulink to verify the proposed method. The results demonstrate that the proposed method is effective and has high accuracy.
Sponsorship	Fluid Power Systems and Technology Division
File Format	PDF
ISBN	9780791851968
DOI	10.1115/FPMC2018-8805
Conference Proceedings	BATH/ASME 2018 Symposium on Fluid Power and Motion Control
Language	English
Publisher Date	2018-09-12
Publisher Place	Bath, UK
Access Restriction	Subscribed
Subject Keyword	Leakage Pistons Fault diagnosis Flaw detection Hydraulic cylinders Computer simulation Valves Signals Pressure Displacement Matlab
Content Type	Text
Resource Type	Article

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Diagnosis Method for Valve-Controlled Hydraulic Cylinder Leakage Based on Subspace Identification