Multivariable System Identification and Robust Control of a Proton Exchange Membrane Fuel Cell System
Resource
Proceedings of the 46th IEEE Conference on Decision and Control, pp. 6118-6123
Journal
46th IEEE Conference on Decision and Control
Pages
6118-6123
Date Issued
2007-12-12
Date
2007-12-12
Author(s)
Abstract
This paper develops a multivariable robust
controller for a proton exchange membrane fuel cell (PEMFC) system. To give a perspective of the system, a PEMFC can be simplified as a two-input-two-output model, where the inputs are air and hydrogen flow rates, while the outputs are cell voltage and current. By fixing the output resistance, we aim to control the cell voltage output by regulating the air and hydrogen flow rates. Due to the nonlinear characteristics of this system, a multivariable robust controller is designed to provide robust performance and to reduce hydrogen consumption. The study is carried out in three parts. First, the system transfer functions are experimentally identified. Secondly, robust control algorithms are adopted to design a 2-by-1 H controller to deal with the system uncertainty and performance requirements. Finally, the designed H_inf controller is implemented to control the air and hydrogen flow rates. From the experimental results, the multivariable robust control is deemed effective.
Subjects
Robust control, fuel cell
Type
conference paper
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