JIANG Zhao-Hui Ph.D. candidate at the School of Information Science and Engineering, Central South University. He received his master degree from Central South University in 2006. His research interest covers singular systems, time delay systems, and decentralized robust control. Corresponding author of this paper. E-mail: jzh0903@126.com GUI Wei-Hua Professor at Central South University. His research interest covers modeling and optimal control of complex industrial process, distributed robust control, and fault diagnoses. E-maih gwh@mail.csu.edu.cn XIE Yong-Fang Associate professor at Central South University. His research interest covers decentralized control, robust control, and process control. E-mail: yfxie@mail.csu.edu.cn YANG Chun-Hua Professor at Central South University. Her research interest covers modeling and optimal control of complex industrial process, intelligent control system, and fault-tolerant computing of real-time systems. E-mall: ych@mail.csu.edu.cn