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- W1995652014 abstract "Fuel cells are widely regarded as potential future power sources, they convert the chemical energy of a gaseous fuel directly into electricity. In this paper, the study is concentrated on the control of the air subsystem that feeds the fuel cell cathode with oxygen—whose dynamics is described with a widely accepted nonlinear model. Due to the complexity of this model, the model-based controllers that have been proposed for this application are designed using its linear approximation at a given equilibrium point, which might lead to conservative stability margin estimates. On the other hand, practitioners propose the use of simple proportional or proportional-integral controllers around the compressor flow, which ensures good performance in most applications. Using some monotonicity characteristics of the system, in this paper we provide the theoretical justification to this scheme, proving that this output variable has the remarkable property that the linearization (around any admissible equilibrium) of the input-output map is strictly passive. Hence, the controllers used in applications yield (locally) asymptotically stable loops—for any desired equilibrium point and all values of the controller gains. Ensuring stability for all tuning gains overcomes the inherent conservativeness of linearized dynamics analysis, and assures robustness and high performance." @default.
- W1995652014 created "2016-06-24" @default.
- W1995652014 creator A5018225150 @default.
- W1995652014 creator A5044238060 @default.
- W1995652014 creator A5073030033 @default.
- W1995652014 date "2011-12-01" @default.
- W1995652014 modified "2023-09-25" @default.
- W1995652014 title "Air supply system of a PEM fuel cell model: Passivity and robust PI control" @default.
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- W1995652014 doi "https://doi.org/10.1109/cdc.2011.6160698" @default.
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