Sliding mode control with varying boundary layers for an electro-hydraulic position servo system |
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| Authors: | Hong-Ming Chen Jyh-Chyang Renn Juhng-Perng Su |
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| Affiliation: | (1) Graduate School of Engineering Science and Technology, National Yunlin University of Science and Technology, Taiwan;(2) Department of Electronic Engineering, Chien Kuo Institute of Technology No. 1, Chieh Sou North Road, Changhua City, Taiwan, 500;(3) Department of Mechanical Engineering, National Yunlin University of Science and Technology, Taiwan;(4) Department of Electrical Engineering, National Yunlin University of Science and Technology, Taiwan |
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| Abstract: | In this study, a new sliding mode control with varying boundary layers is proposed to improve the tracking performance of a nonlinear electro-hydraulic position servo system, which can be found in many manufacturing devices. The key feature of the proposed control scheme is the use of varying boundary layers instead of fixed boundary layers, which are usually employed in conventional sliding mode control. The validity of the proposed control scheme is verified through practical testing on an experimental electro-hydraulic positioning device. In the cases of step and sinusoidal command inputs, the experimental results strongly suggest that the proposed control scheme is capable of improving the tracking precision without causing any chattering. In addition, the new control scheme seems to be very robust against various set point conditions . |
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| Keywords: | Electro-hydraulic position servo system Sliding mode control Varying boundary layer |
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