Modified Fuzzy PID Control for Networked Control Systems with Random Delays

To deal with random delays in Networked Control System (NCS), Modified Fuzzy PID Controller is introduced in this paper to implement real-time control adaptively. Via adjusting the control signal dynamically, the system performance is improved. In this paper, the design process and the ultimate simulation results are represented. Finally, examples and corresponding comparisons prove the significance of this method.

• Yong-can Cao
• Wei-dong Zhang

• Fuzzy Control
• Networked Control System
• PID
• Random Delays

[1] Yodyium Tipsuwan, & Mo-Yuen Chow, "Control methodologies in
networked control systems: A Tutorial," IECON-01, Denvor, CO, 2001.
[2] Chan, H., &, Özgüner, Ü. (1995), "Closed-loop control of systems over a
communications network with queues," International Journal of Control,
62(3), 493-510.
[3] Göktas F, "Distributed control of systems over communication networks
(D)," University of Pennsylvania, 2000.
[4] N. B. Almutairi & M. -Y. Chow, "Adaptive fuzzy modulation (AFM) for
IP networked PI control systems. Part I: Partial adaptation," for possible
presentation at IECON 2002, Sevilla, Spain, 2002.
[5] N. B. Almutairi & M. -Y. Chow, "Adaptive fuzzy modulation (AFM) for
IP networked PI control systems. Part II: Full adaptation," for possible
presentation at IECON 2002, Sevilla, Spain, 2002.
[6] Lin Xiao, Arash Hassibi & Jonathan P. How, "Control with random
communication delays via a discrete-time jump system approach",
Proceedings of American Control Conference, Chicage, IL, 2000.
[7] Hui-he Shao, Advanced Control in Industrial Process. Shanghai Jiao
Tong University Press, Shanghai, China, 1997.