2004 IEEE Conference on Cybernetic and Intelligent Systems

2004 IEEE Conference on Robotics, Automation and Mechatronics

December 1 to 3, 2004
Traders Hotel, Singapore


Intelligent Decoupling Control System of Complex Industrial Process and Application


Tianyou Chai


An intelligent decoupling control system has been presented for complex industrial processes. The proposed system consists of a feedback controller, which is designed to eliminate the tracking errors between the system outputs and the setpoints, a decoupling compensator, which is designed to suppress the effects of unmodeled dynamics, and a feedforward compensator with neural network, which is designed to eliminate the coupling among the loops. The proposed control system can be easily implemented using the distributed control system (DCS) to realize decoupling control for industrial processes with compositive complexities including high nonlinearity, strong coupling ,higher order, and varying time. This system has been successfully applied to the ball mill pulverizing systems of 200MW power units. Simulation and industrial experiment show the robust performance of the proposed system and its bright future in the industry.




Professor Tianyou Chai

Control Science and Control Engineering

Northeastern University

Director of National Research Center for

Metallurgical Automation Technology

Shenyang, Liaoning Province

China 110004


Professor Tianyou Chai received the M.B. and PhD degrees from Northeastern University, P.R.China in 1983 and 1985, Since 1985, he has been with Northeastern University where he became professor in 1988 and doctor supervisor of Control Science and Control Engineering in 1990. He has been director of National Research Center for Metallurgical Automation Technology since 1997. He is member of Chinese Academy of Engineering.


Dr. Chai served as Member of Technical Board of IFAC from 1996 to 1999 and Chairman of Coordinating Committee on Manufacturing and Instrumentation of IFAC from 1996 to 1999. He is currently serving as Deputy Director of Experts Committee of Advanced Manufacturing and Automation in High-tech Research and Development Program of China, Chief Scientist of National Key Basic Research and Development Program of China.


His research interests include intelligent decoupling control, adaptive control and integrated automation systems. He has published more than two hundred papers in international journals and international conferences. He developed several integrated automation systems, which have been successfully applied in the process industries in China, such as metallurgy industry, electric power industry and environmental conservation industry.


He was the recipient of two prizes of National Science and Technology Progress Award in 1999 and again in 2001, He was awarded the title of Ho Leung Ho Lee Foundation Technological Science Prize in 2002.




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