Robust state estimation of P.E.M. fuel cell systems

Abstract : In this paper a model based state estimation is developed using the Mean Value Theorem with Bounded Jacobian. The case of additive perturbations is also treated. This method is afterwards applied to a Fuel Cell Stack System(FCSS). The main type of fuel cell on which this work is concentrated is the Polymer Electrolyte Membrane(Proton Exchange Membrane) that uses a Nafilon 117 membrane [1]. The model presents some simplifications considering only pure Oxygen as input and also an ideal humidifying and cooling unit. The numerical problem of the disequilibrium between small mass values and big pressure values is resolved by constructing a symmetric system.