A Nonlinear State Feedback for DC/DC Boost Converters

Abstract

This paper investigates the control problem for static boost type converters using an high gain state feedback robust controller incorporating an integral action. The robust feature allows to achieve the required performance in presence of parametric uncertainties, while the integral action provides an offset free performance with respect to the desired levels of voltage. The adopted high gain approach is motivated by both fundamental as well as practical considerations, namely the underlying fundamental potential and the design parameter specification simplicity. The stability and convergence analysis has been carried out using an adequate Lyapunov approach, and the control system calibration is achieved throughout a few design parameters which are closely related to the desired dynamical performances. The effectiveness of the proposed control approach has been corroborated by numerical simulations and probing experimental results. IntroductionThe control of static converters has been the subject of an important research activity over the past decades. This interest is mainly due to the emergence of embedded electronics in everyday life, increasing thereby the need for more efficient converters. Indeed, this type of converter is used for many applications such as laptop computers [1], photo-voltaic [2], vehicular systems [3], fuel cell [4], etc. Furthermore in recent use of electrical devices, the control problem is not the only feature required from the user. There are more and more need of informations on the evolution/aging of the system. In the case of converters, these informations can be obtained by reconstructing voltages and currents thanks to suitable observers.

Robust control of a DC-DC three-port isolated converter

“…Furthermore, DC-DC converters have problems related to external disturbances and fluctuations of the input voltage (Benzaouia et al, 2016). To deal with this problem, robust nonlinear controllers were designed in Gehan et al (2017), He and Luo (2006), and Cortes et al (2004) for DC-DC switched converters. However, implementation complexity and difficulties in guaranteeing the transient performance are the main drawbacks of these nonlinear controllers.…”

Voltage Regulation Control with Adaptive Fuzzy Logic for a Stand-Alone Photovoltaic System

“…With regard to the fluctuation of the voltage at the output of the DC-DC converter, two control structures can be used. Current mode control, consisting of two interlocking closedloop systems; the internal system is a current control system, while the external system is a voltage control system [12][13][14][15][16][17].…”

“…However, the performance of the control system may be poor when working outside the nominal operating conditions. Fuzzy Logic controllers have been used in the researched [12,13] without any guarantee of stability and performance for simultaneous variation of source and load. The second approach is voltage control, which is based on direct control of the output voltage without using the current control system or stabilizing the dynamics of unstable zeros.…”

Flatness-Based Decentralized Adaptive Backstepping Control of Cascaded DC–DC Boost Converters Using Legendre Polynomials

“…For a single boost converter, a widely used method is the nested control strategy where the inner-loop controls the current and the outer-loop tunes the converter voltage (Gehan et al 2017;Chen et al 2011). Both of loops can own the proportional-integral (PI) controller due to its simplicity (Erickson and Maksimovic 2001).…”

“…The feasibility of nested control strategy requires the inner loop to be relatively fast. However, the system performance may be fragile during the non-nominal operating conditions such as the load and supply voltage changes (Gehan et al 2017). Other strategies such as flatness property have been developed for the boost converters (Linares-Flores et al 2014;Hernandez-Mendez et al 2017).…”