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Double Adaptive Fuzzy Sliding Mode Control Scheme for Electro-hydraulic Velocity Servo System

Author(s): Rui Tang | Qi Zhang | Shao Jiang Wang

Journal: Information Technology Journal
ISSN 1812-5638

Volume: 11;
Issue: 5;
Start page: 620;
Date: 2012;
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Keywords: numerical simulation | double adaptive fuzzy sliding mode control | sliding mode control | Electro-hydraulic servo system

Pointing on uncertainties in the velocity servo system, caused by servo system cant model accurately, may cause the deterioration of the control quality of the Electro-Hydraulic Velocity Servo System (EHVSS) and even lead to its instability. An Double Adaptive Fuzzy Sliding Mode Control (DAFSMC) algorithm is proposed for an EHVSS. The proposed control strategy has fast response and good disturbance rejection capability. The numerical simulation is presented to verify the effectiveness of the proposed control scheme. It is shown from the experimental results that the proposed controller offers several advantages such as fast response, good disturbance rejection capability, good velocity tracking capability and so forth. It is also revealed from simulation results that the proposed control strategy is valid for the EHVSS.

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