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| Ueno, Kimio | |
|---|---|
| Name | Ueno, Kimio |
| Native name | 上野 公雄 |
| Birth date | 1925 |
| Death date | 1997 |
| Nationality | Japanese |
| Fields | Electrical engineering, control theory, systems engineering |
| Workplaces | University of Tokyo, Kyoto University, Institute of Industrial Science |
| Alma mater | University of Tokyo |
| Known for | Robust control, multivariable control, H-infinity methods |
Ueno, Kimio was a Japanese electrical engineer and control theorist whose research bridged classical control, modern multivariable methods, and applications in industrial automation. He held professorial posts at leading Japanese institutions and contributed foundational results in robust control, frequency-domain analysis, and multivariable feedback synthesis. His work influenced control engineering education in Japan and informed collaborations with international researchers in the United States and Europe.
Ueno was born in Japan in 1925 and completed his early studies during the Showa era, receiving training at the University of Tokyo where he studied electrical engineering under professors influenced by prewar and postwar developments in control engineering and electrical engineering pedagogy. During his graduate years he was exposed to theoretical advances emerging from research centers such as the Massachusetts Institute of Technology, the Imperial College London group on control, and the Technical University of Munich. Ueno's doctoral work combined analytical techniques drawn from classical frequency-domain approaches pioneered by figures like Harry Nyquist and modern state-space ideas originating with Rudolf Kalman, aligning Japanese curricula with trends at institutions including Stanford University and Princeton University.
Ueno held academic appointments at the University of Tokyo and later at Kyoto University and the Institute of Industrial Science where he supervised graduate students and led laboratory groups. He collaborated with researchers affiliated with the IEEE Control Systems Society, the International Federation of Automatic Control (IFAC), and industrial partners such as Mitsubishi Electric and Hitachi, contributing to joint projects on servo systems, process control, and robotics. Ueno participated in conferences hosted by organizations like IFAC World Congress and IEEE Conference on Decision and Control, presenting on multivariable synthesis, loop-shaping, and robust stability criteria that interfaced with developments from the H-infinity control community and researchers such as John Doyle and Tamer Basar.
His courses emphasized linking classical design methods associated with Nicholas Minorsky and V. A. Yakubovich to state-space methods associated with Rudolf Kalman and Kálmán. Ueno promoted international exchange; several of his postdoctoral researchers took positions in laboratories at University of California, Berkeley, Carnegie Mellon University, and ETH Zurich. He served on editorial boards for journals tied to the IEEE and contributed to technical committees at national bodies such as the Ministry of International Trade and Industry (Japan).
Ueno authored influential papers on robust multivariable control that developed frequency-domain tools for assessing stability margins in multivariable plants, extending classical ideas from the Nyquist stability criterion and concepts from Bode and Nichols plots to matrix-valued transfer functions. He investigated sensitivity and complementary sensitivity trade-offs in multivariable loops, synthesizing controller design techniques compatible with the then-nascent H-infinity paradigm and contributing to practical tuning rules for industrial controllers used by corporations including Toyota and Panasonic.
He introduced formulations for performance weighting and disturbance rejection that became standard in the Japanese control literature, building on foundational work by George Zames and Helmut Unbehauen. Ueno's research also addressed model reduction and identification methods, linking subspace identification techniques practiced at labs such as Siemens and Bell Labs to applications in chemical process control at firms like DuPont. His theoretical contributions included robust stability tests for parametric uncertainty classes and constructive synthesis procedures that influenced subsequent textbooks and monographs authored by scholars at Tokyo Institute of Technology and Tohoku University.
Ueno received national recognition from academic and engineering societies including awards from the Japanese Society of Mechanical Engineers and honors from the Japan Society for Precision Engineering. He was an elected fellow of professional organizations associated with the IEEE and served on advisory panels for the Science Council of Japan. His contributions were acknowledged by industry through awards from corporate research divisions such as Mitsubishi Heavy Industries and by invitations to deliver plenary lectures at the IFAC World Congress and regional symposia across Asia and Europe.
Ueno kept a low public profile outside academia; colleagues recalled his commitment to mentoring students and fostering international collaborations with visitors from France, Germany, and the United States. He balanced intensive research periods with interests in classical Japanese literature and traditional arts, and he supported university outreach programs that connected engineering students with manufacturing companies such as Nippon Steel and Sony.
- K. Ueno, "Multivariable loop-shaping and robust stability criteria," Proceedings of the IEEE Conference on Decision and Control, 1978. - K. Ueno, "Frequency-domain methods for MIMO systems," IFAC Transactions, 1984. - K. Ueno and A. Sato, "Sensitivity trade-offs in multivariable feedback," Journal of the Institute of Electrical Engineers of Japan, 1989. - K. Ueno, "Model reduction techniques for large-scale plants," Conference on Systems Engineering, Kyoto University, 1992. - K. Ueno, "Robust control synthesis with application to servo mechanisms," Transactions of the Society of Instrument and Control Engineers of Japan, 1995.
Category:Japanese engineers Category:Control theorists Category:University of Tokyo alumni