Gainscheduling Control Based on
 Linear Parameter Varying Model of Buck Converters

Abstract

Abstract: The output of switching converters can be easily influenced by the load and the line voltage. In this paper, a gain scheduling control based on a linear parameter varying (LPV) model of Buck converters is proposed to avoid this situation. Firstly, based on the small signal model of Buck converters, the LPV model with the load and the line voltage used as varying parameters is established by convex decomposing technique. Then, an LPV controller is designed with a structure of convex polytope using linear matrix inequality (LMI) technique. A system with this controller can have H∞ performances and all the closedloop system poles are located in a specific area. Finally, the simulation results show that the system with LPV controller has better performances than those with robust state feedback controllers.

Key words: Buck converter, linear parameter varying (LPV), gain scheduling control, H&infin, control, convex decomposing technique, linear matrix inequality (LMI)

CLC Number:

TP 17

LUO Xu1，ZHANG Gansheng2，XIE Wei2. Gainscheduling Control Based on
Linear Parameter Varying Model of Buck Converters[J]. Journal of Shanghai Jiaotong University, 2017, 51(6): 698-703.

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