Nonlinear control of PEM fuel cells by exact linearization

This paper presents a dynamic model of polymer electrolyte membrane fuel cells (PEM FC) for the purpose of constructing a nonlinear control strategy for PEM FC by using the exact linearization approach. By introducing additional states and outputs, the original multiple-input single-output (MISO) nonlinear model of PEM FC is transformed into a multiple-input multiple-output (MIMO) system so that the exact linearization approach can be directly utilized. Simulation results show that PEM fuel cells with nonlinear control have better transient and steady-state performances.