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LI Fei,ZHAO Dongdong,HUANGFU Yigeng,ZHAO Guosheng.Robust Nonlinear Observer for State Estimation of PEMFC System[J].JOURNAL OF POWER SUPPLY,2019,17(2):19-25
Robust Nonlinear Observer for State Estimation of PEMFC System
Received:November 30, 2018  Revised:February 28, 2019
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DOI:10.13234/j.issn.2095-2805.2019.2.19
Keywords:robust nonlinear system observer  proton exchange membrane fuel cell(PEMFC)  oxygen excess ratio(OE-R)  linear matrix inequality(LMI)
Fund Project:The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)
           
AuthorInstitutionEmail
LI Fei School of Automation, Northwestern Polytechnical University, Xi'an , China 2928781022@qq.com
ZHAO Dongdong School of Automation, Northwestern Polytechnical University, Xi'an , China
HUANGFU Yigeng School of Automation, Northwestern Polytechnical University, Xi'an , China
ZHAO Guosheng School of Automation, Northwestern Polytechnical University, Xi'an , China
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Abstract:
      In light of the strong nonlinearity and coupled characteristics of a proton exchange membrane fuel cell(PEMFC) system, a robust nonlinear system observer for the oxygen excess ratio(OER) estimation of the PEMFC system is proposed in this paper, which solves the problem of accurately estimating the state variables(e.g., air mass in the sup-ply manifold, oxygen mass and nitrogen mass in the cathode side) that cannot be directly measured by sensors in the PEMFC system. Through matrix transformation, the differential mean value theorem is used to transform the dynamic error system into a linear variable parameter system. Based on the Lyapunov stability theory and convexity principle, the observer design problem is transformed into a linear matrix inequality(LMI) feasibility problem. Simulation results show that the designed observer has satisfying convergence characteristics.
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