|Title:||System identification and robust control of a portable proton exchange membrane full-cell system||Authors:||Wang, Fu-Cheng
|Keywords:||Proton exchange membrane;Fuel-cell;Robust control;System identification||Issue Date:||15-Feb-2007||Journal Volume:||164||Journal Issue:||2||Start page/Pages:||704-712||Source:||Journal of Power Sources||Abstract:||
This paper will discuss the application of system identification techniques and robust control strategies to a proton exchange membrane fuel-cell
system. The fuel-cell system’s dynamic behaviour is influenced by many factors, such as the reaction mechanism, pressure, flow-rate, composition
and temperature change, and is inherently non-linear and time varying. From a system point of view, however, the system can be modelled as a
two-input, two-output linear time-invariant system whose inputs are hydrogen and air flow rates, and whose outputs are cell voltage and current.
On the other hand, the system’s non-linearities and time-varying characteristics can be regarded as system uncertainties and disturbances that are
treated by the designed robust controllers. This paper is comprised of three parts. First, system identification techniques were adopted to model
the system’s transfer functions. Second, the H∞ robust control strategies were applied to stabilise the system. Finally, the system’s stability and
performance were compromised by introducing weighting functions to the controller’s design. From the experimental results, the designed H∞
robust controllers were deemed effective.
|Appears in Collections:||機械工程學系|
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