@inproceedings{17236f3fa43741668be0417f356782ed,
title = "H-/H∞UIO-Based Robust Fault Diagnosis Design in Finite Frequency Domain for Discrete-Time Systems",
abstract = "This study investigates the problem of robust fault diagnosis for discrete-time systems subjected to actuator faults and unknown input disturbances. A novel H-/L-\{infty\} unknown input observer (UIO) based on the generalized Kalman-Yakubovich-Popov (GKYP) lemma is presented by decoupling the partial unknown input disturbances and attenuating the unknown input disturbances that cannot be decoupled. Then, the H- performance index in the finite frequency domain is used to measure the fault sensitivity and the L-\{infty\} performance index is used to reduce the influence of unknown input disturbances on fault diagnosis results and ensure the robustness performance. A residual evaluation function and a time-varying threshold are presented based on the L-\{alpha\} performance index. In addition, sufficient conditions for designing the H-/L-\{infty\} UIO are proposed and transformed into linear matrix inequalities (LMIs) that can be easily solved. Finally, simulations of a simple discrete-time system are used to validate the effectiveness of the developed H-/L-\{infty\} UIO.",
keywords = "Discrete-time System, Fault diagnosis, Finite frequency domain, Linear matrix inequality (LMI), Unknown input observer (UIO)",
author = "Sheng Gao and Jian Wang and Zhihui Lu and Guangfu Ma and Yanning Guo",
note = "Publisher Copyright: {\textcopyright} 2022 Technical Committee on Control Theory, Chinese Association of Automation.; 41st Chinese Control Conference, CCC 2022 ; Conference date: 25-07-2022 Through 27-07-2022",
year = "2022",
doi = "10.23919/CCC55666.2022.9901789",
language = "英语",
series = "Chinese Control Conference, CCC",
publisher = "IEEE Computer Society",
pages = "3978--3983",
editor = "Zhijun Li and Jian Sun",
booktitle = "Proceedings of the 41st Chinese Control Conference, CCC 2022",
address = "美国",
}