Corresponding author. Yong Zhang was born in 1977. He received the B.S. degree in mathematics from Xuzhou Normal University, Xuzhou, China, in 2001. He is currently a Ph.D. candidate at the Department of Control Science and Engineering, Huazhong University of Science and Technology. His research interests include networked and control system, time-delay systems, control system faultdiagnosis. E-mail: zhangyongyq @ yahoo.com.cn Huajing Fang received the Ph.D. degree in control theory and control engineering from Huazhong University of Science and Technology in 1991. He is working with the Department of Control Science and Engineering, Huazhong University of Science and Technology, where he is a professor, the director of the Institute of Control Theory, and the associate director of the Centerfor Nonlinear and Complex Systems. His current research interests include networked control system, control system fault diagnosis, robust and fault-tolerant control and swarm systems. E-mail: hj fang @ mail.hust.edu.cn Zhen Luo received the B.S. degree in automation from Central South University for Nationalities, Wuhan, China, in 2006. She is currently working toward the Ph.D. degree in control theory and control engineering at Huazhong University of Science and Technology. Her research interests include state estimation and fault diagnosis of networked control systems.E-mail: zhenzi2006 @ yahoo.com.cn