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In this paper, an improved cascade second-order sliding mode (SOSM) methodology for a polymer electrolyte membrane (PEM) fuel cell air supply system is proposed. Based on the simplified six-order nonlinear model, the control objective oxygen excess ratio is achieved by using SOSM algorithm. Besides, parametric uncertainty and noise are presented in the dynamic fuel cell model. The modified two stage...
Based on the dynamic model of semi — active air suspension with two degree of freedom quarter-car, a controller is designed using backstepping technology and sliding mode control. In the MATLAB / Simulink environment, the effect of backstepping sliding mode controller on car body acceleration, suspension dynamic travel and tire dynamic load is studied. The backstepping controller of the semi-active...
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