Design of a robust integral sliding mode controller using the continuous function-based fast power reaching law for DC-DC boost converters in fuel cells applications

This paper presents a continuous function-based fast power reaching law-nonlinear robust integral sliding mode control scheme for regulating the output voltage of a DC-DC boost converter in applications of a proton exchange membrane fuel cell (PEMFC). An averaged mathematical model of the DC-DC boost converter is used for designing the proposed controller where the main control objective is tracking of the reference output voltage. To guarantee the nominal operation of the system under uncertainties, the bounded external disturbances are included with the model. The stability of the system while ensuring the desired tracking of the output voltage is proved using the theory of candidate Lyapunov functions. At last, the performance of the proposed controller is verified via the MATLAB/Simulink by varying the reference output voltage. For showing superiority, the performance of the proposed controller is also compared with the performance of a conventional sliding mode controller. Simulation results evident that the proposed controller is better than the conventional sliding mode controller in terms of settling time, overshoot, and steady-state tracking error.