About the Author
The holder of three patents, Åström is an editor of the journal Automatica. He has written five books and many papers. He is a fellow of the IEEE, a member of the Royal Swedish Academy of Sciences and the Royal Swedish Academy of Engineering Sciences (IVA). He is also a foreign associate of the U.S. National Academy of Engineering. Åström has received many awards, among them the Rufus Oldenburger Medal from ASME in 1985, the Quazza medal from IFAC in 1987, the IEEE Control Systems Science and Engineering Award in 1990, and the IEEE Medal of Honor "for fundamental contributions to theory and applications of adaptive control technology" in 1993.
TORE HÄGGLUND, PH.D., is a professor in the Department of Automatic Control at the Lund Institute of Technology in Lund, Sweden. He holds an M.S. in Engineering Physics and a Ph.D. in Automatic Control, both from the Lund Institute of Technology. During his Ph.D. studies that focused on adaptive control and fault detection, he and Dr. Karl J. Åström developed the relay autotuner for automatic tuning of PID controllers. The method was patented and is now implemented in many industrial products. After completing his studies, Dr. Hägglund joined SattControl Instruments (now ABB) where he implemented automatic tuning methods and developed new industrial adaptive controllers.
Upon completion of his work at SattControl Instruments, he returned to the Department of Automatic Control at Lund Institute of Technology where his research in process control, adaptive control, and fault detection has resulted in a new dead-time compensting controller, methods for supervision of PID controllers and automatic detection of friction in valves, and a method to compensate for static friction in control valves. These methods have also been implemented in industrial products.