LI Ping Lecturer at the College of Information Science and Engineering, Huaqiao University. Her reseaxch interest covers fault-tolerant control, adaptive fuzzy control, and backstepping control. Corresponding author of this paper. E-mail: pingping_ 1213@126.com JIN Fu-Jiang Professor at Huaqiao University. His research interest covers model, control, and optimization of production process. E-mail: jinfujiang@163.com