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Zbl 1124.93026
Olm, J.M.; Biel, D.; Fossas, E.; Zinober, A.S.I.; Sanz, L.M.
Sliding motion, robust control and power loss minimization in a class of non-linear switched converters. (English)
[J] Int. J. Control 80, No. 6, 968-981 (2007). ISSN 0020-7179; ISSN 1366-5820/e

Summary: We propose a sliding mode control scheme that allows robust control of the output voltage in a class of non-linear switched converters that includes the non-inverting buck-boost, the Watkins-Johnson and the inverse of Watkins-Johnson. Using a full-state reference profile-based sliding surface, periodic signals may be tracked by the output voltage under appropriate restrictions. Furthermore, semi-infinite programming techniques are used to minimize power loses while taking into account the existence of load perturbations. The procedure consists of choosing a reference signal for the inductor current with minimum root mean square, subject to the maintenance of sliding regime under possible load variation in a set with known bounds. Realistic simulation results show a highly robust performance in the presence of load disturbances.

MSC 2000:: *93B51 Design techniques in systems theory
93C10 Nonlinear control systems
93C15 Control systems governed by ODE
93B35 Sensitivity (robustness) of control systems
90C34 Semi-infinite programming
93C95 Appl. of control theory

Keywords: sliding mode control scheme; robust control of output voltage; semi-infinite programming

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