Abstract
An adaptive fuzzy sliding-mode (AFSM) control system is developed to control parallel DC-DC boost converters. The AFSM control system that combines a fuzzy adaptation technique with sliding mode control to enhance robustness and sliding performance in a class of uncertain multi-input multi-output (MIMO) nonlinear systems is proposed. Using an online adaptation scheme, a fuzzy sliding mode controller is used to approximate the equivalent control in neighborhood of the sliding manifold. The controller improves the dynamic performance of a parallel boost converter, the output voltage is robust against load disturbances and the output currents are very well equalized. Experimental results show that the proposed MIMO-AFSM control system is found to achieve favorable regulation performances even under load-resistance variations.
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