A Simple LQ Suboptimal Control Scheme for a DC-DC Step-Down Converter Based on Approximate Affine Discretization of Continuous-Time PWM Linear Systems

연속시간 PWM 선형 시스템의 근사 어파인 이산화를 통한 DC-DC 강압 컨버터의 간단한 LQ 준최적 제어 기법

This paper presents a discrete-time approximate linear model of the continuous-time pulse-width-modulated linear system, and then, by employing the resultant model, a simple LQ suboptimal control scheme is proposed for a DC-DC step-down buck converter. The proposed scheme effectively regulates the output voltage to the desired level, which is also verified by the numerical simulation.