State Observers Design for PEMFC Systems
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Document typeMaster thesis
Date2014-06
Rights accessRestricted access - author's decision
Abstract
A series of nonlinear state observers are developed to estimate unmeasurable variables in a Proton
Exchange Membrane Fuel Cell (PEMFC) system. A study of the most relevant variables
to estimate which will improve the e ciency of the system and its performance is done. The
implementation of the observers is based on the partial di erential equations that de ne the
dynamics of the plant, represented by a distributed parameters model. Forward and backward
discretization of the distributed model are performed to take advantage of the boundary conditions
of the problem. A super-twisting corrective control action is implemented in the nonlinear
observers to reduce the estimation error to zero in a finite amount of time. Simulation results
are presented to show the performance of the observers to recover the values of the gas species
concentrations and to extract conclusions for future research work.
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