Abstract
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 servo system, and even lead to its instability. Sliding model control (SMC) strategy has been application in electro-hydraulic velocity servo control. Given that the quality and stability of servo system will be affected by the chartering phenomenon in the SMC, this paper proposes an approach to overcome the chattering: dynamic sliding mode control (DSMC). In this paper the mathematical model is established and the dynamic sliding mode controller is designed. Simulation and experiment indicated that: the proposed control strategy has good performance on velocity tracking and chattering reducing .The stability and control quality of the servo system are improved.
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