System Identification and H-infinity Controller for Proton Exchange Membrane Fuel Cells
Date Issued
2006
Date
2006
Author(s)
Huang, Chih-Wei
DOI
zh-TW
Abstract
This thesis aims to identify the dynamics and to design the H-infinity controller of the proton exchange membrane fuel cells. The objective of H-infinity controller is to control air pump voltage in order to provide a steady voltage output under system variations.
First, an application of electro-chemical reactions of fuel cells results in a dynamic model, which is further simplified to a coupled nonlinear multi-input and multi-output system. The nonlinear system is then linearized about some operating points to derive a control-oriented linear system. Second, we can use dynamic signal analyzer (HP-35670A) to measure frequency response diagrams in all kinds of cases and utilize the method of curve fitting to identify the transfer function of the proton exchange membrane fuel cell. Based on the identification results, a SISO H-infinity controller was designed and tested for the fuel cell. It is verified that the H-infinity controller works successfully. The H-infinity controller gives stable and satisfied responses of the system under various loading conditions of fuel cell operation.
various loading conditions of fuel cell operation.
Subjects
質子交換膜燃料電池
系統識別
曲線擬合
強韌控制
PEMFC
System identification
curve fitting
Robust control
Type
thesis
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