Abstract
State estimation is the primary concern in system analysis and control issues, especially for complex networked systems. This paper explores the influence of communication delays on the initial-state detectability of networked discrete event systems (NDESs). Firstly, the communication delays are hypothesized to be upper bounded through the observation channel, and the notion of networked initial-state (NI) detectability is proposed and lucubrated. Subsequently, according to the semi-tensor product (STP) of matrices, the dynamics affected by bounded delays could be perfectly depicted by a reachable matrix. Then, these algebraic criteria of NI detectability: strongly NI and weakly NI detectability, can be converted into checking some constructed matrix. Meanwhile, two algorithms are developed to verify the detectability based on a novel algebraic framework. Lastly, one prototypical numeric example is provided to validate the effectiveness of our theoretical approach. Note that the current results will help us to further investigate the detectability-based enforcement of networked systems.
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This work was supported in part by the National Natural Science Foundation of China under Grant no. 62173247.
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Kexin Ren received her B.S. degree in computer science and technology from Shenyang Ligong University, Liaoning, China, in 2019. Now she is a graduate student in computer technology with the School of Computer Science and Engineering, Tianjin University of Technology. Her current research interests include the control of networked discrete event systems and security of cyber-physical systems.
Zhipeng Zhang received his M.Sc. degree in control science and engineering from the School of Electrical and Information Engineering, Tianjin University, Tianjin, in 2016, and a Ph.D. degree in operational research and cybernetics from College of Artificial Intelligence, Nankai University, Tianjin, China, in 2019. Now he is a lecturer with the School of Computer Science and Engineering, Tianjin University of Technology. His current research interests include the control of networked discrete event systems and security of cyber-physical systems.
Chengyi Xia received his B.S. degree in mechanical engineering from Hefei University of Technology, Hefei, China, in 1998, an M.Sc. degree in nuclear energy science and engineering from the Institute of Plasma Physics, Chinese Academy of Science, Hefei, in 2001, and a Ph.D. degree in control theory and control engineering from Nankai University, Tianjin, China, in 2008. Since 2013, he has been a professor with the School of Computer Science and Engineering, Tianjin University of Technology. His research interests include complex system modeling and analysis, complex networks, epidemic propagation and evolutionary game theory.
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Ren, K., Zhang, Z. & Xia, C. I-Detectability of Networked Discrete Event Systems by Matrix Approach. Int. J. Control Autom. Syst. 20, 750–757 (2022). https://doi.org/10.1007/s12555-021-0017-0
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DOI: https://doi.org/10.1007/s12555-021-0017-0