Corresponding author.Yanyan Yin was born in 1983. She is a Ph.D. candidate at Jiangnan University. Her research interests are stochastic systems and stochastic controller design. E-mail: yinyanyan_2006 @ 126.com Fei Liu was born in 1965. He is a professor in Jiangnan University. His research interests are modem control techniques and fault detection. E-mail: fliu@jiangnan.edu.cn