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Failure diagnosis and tolerant control method for hydrothermally aged SCR system by utilizing EKF observer and MRAC controller

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  • Hu, Jie
  • Zeng, Jiawei
  • Wei, Li

Abstract

For ensuring emission performances of a selective catalytic reduction (SCR) system, it shall be critically robust and adaptive against any hydrothermal aging failure throughout its whole service life. Simulation was carried out here to investigate its hydrothermal aging effect by using such hydrothermal aging model and the corresponding results showed that its performances were significantly influenced while the catalyst (V2O5/WO3-TiO2) was hydrothermally aged. On this basis, an extended-Kalman-filter-based (EKF-based) observer was designed to identify its hydrothermal aging states and the corresponding results indicated that the actual hydrothermal aging degree could be estimated quickly and accurately. Moreover, a Lyapunov-based model reference adaptive controller (MRAC) was designed to improve its control performances based on the diagnosis information from the EKF-based observer while V2O5/WO3-TiO2 was hydrothermally aged. Thus, its hydrothermally aged failure-tolerant control performances could be remarkable improved by means of Lyapunov-based MRAC.

Suggested Citation

  • Hu, Jie & Zeng, Jiawei & Wei, Li, 2018. "Failure diagnosis and tolerant control method for hydrothermally aged SCR system by utilizing EKF observer and MRAC controller," Energy, Elsevier, vol. 156(C), pages 103-121.
    • Handle: RePEc:eee:energy:v:156:y:2018:i:c:p:103-121
    DOI: 10.1016/j.energy.2018.05.094
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    Cited by:

    1. Wang, Guoyang & Awad, Omar I. & Liu, Shiyu & Shuai, Shijin & Wang, Zhiming, 2020. "NOx emissions prediction based on mutual information and back propagation neural network using correlation quantitative analysis," Energy, Elsevier, vol. 198(C).
    2. Dong, Zhe & Liu, Miao & Guo, Zhiwu & Huang, Xiaojin & Zhang, Yajun & Zhang, Zuoyi, 2019. "Adaptive state-observer for monitoring flexible nuclear reactors," Energy, Elsevier, vol. 171(C), pages 893-909.
    3. Kang, Lulu & Lou, Diming & Zhang, Yunhua & Fang, Liang & Luo, Chagen, 2023. "Research on cross sensitivity of NOx sensor and Adblue injection volume in accordance with the actual situation based on cubature Kalman filter," Energy, Elsevier, vol. 284(C).

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