Nonlinear adaptive controller design for PWM based DC-DC boost converters using bankstepping control scheme

This paper presents a nonlinear adaptive controller design with a recursive methodology based on the pulse width modulation (PWM) to drive a DC-DC boost converter. The proposed controller is designed based on the dynamical model of the boost converter where all parameters within the model are assumed as unknown. These unknown parameters are estimated through the adaptation laws and the stability of the whole system is ensured by formulating the suitable control Lyapunov functions (CLFs). One of the main features of the proposed scheme is that it overcomes the over-parameterization problems of unknown parameters which usually appear in some conventional adaptive methods. Finally, the effectiveness of the proposed control scheme is verified through the simulation results and compared to that of an existing adaptive backstepping controller. Simulation results clearly indicate the performance improvement of the proposed controller in terms of a faster output voltage tracking response.