DESIGN AND IMPLEMENTATION OF A NOVEL CONTROL ARCHITECTURE BY COMBINING H_∞ AND SLIDING MODE SCHEMES FOR A BOOST CONVERTER

Abstract

A two-loop control has been designed for a boost converter. An internal sliding-mode control loop forces the converter inductor current to track the reference established by H∞ control of the output voltage in an outer loop. The outer H∞ controller is designed through loop shaping concepts. A practical design approach that aims at systematizing the procedure for the selection of inner sliding mode control parameters is also presented. The closed loop characteristics of a typical low-power boost converter with the proposed dual loop controller implemented in the actual switched model is validated through computer simulation. The proposed controller is found to be superior due to its low distortion property, good regulating performance and insensitivity to load variations. Finally, the validity and effectiveness of the control schemes are verified through hardware experiments.

Fast and robust voltage control of DC–DC boost converter by using fast terminal sliding mode controller

“…Thanks to the LSS, as the CSMC can provide asymptotic stability when the system dynamics are in the sliding mode. Nevertheless, the error signal may not converge to zero in finite time because of the asymptotic convergence rate of the LSS [30][31][32][33][34].…”

“…The SMC is investigated for the BC because of its superior properties, such as insensitive to external disturbances and parametric uncertainties [29, 30]. Moreover, the SMC is combined with other control techniques, such as fuzzy logic [2], PID [31], PI [32], and H ∞ [33] to have more efficient control for the BC. In these studies, the CSMC having a linear sliding surface (LSS) is employed for the control of the BC.…”