SICE 社団法人 計測自動制御学会
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 会告:2009 SICE Annual Conference Awardの贈呈
○International Award

Dr. Yoshio EBIHARA (Member)

He received the B.E., M.E. and D.E. degrees in electrical engineering from Kyoto University, Kyoto, Japan, in 1997, 1999 and 2002, respectively. Since 2002, he has been with the Department of Electrical Engineering, Kyoto University, where he is a Lecturer since 2006. His research interests include computer-aided control system analysis and design.

受賞論文「Robustness Analysis of Uncertain Discrete-Time Linear Systems based on System Lifting and LMIs」
In this paper, we propose novel LMI conditions for the stability and $l_2$ gain performance analysis of discrete-time linear periodically time-varying (LPTV) systems. These LMIs are convex with respect to all of the coefficient matrices
of the LPTV systems and this property is expected to be promising when dealing with several control system analysis and synthesis problems. For example, we can apply those LMIs straightforwardly to robust performance analysis problems of LPTV systems that are affected by polytopic-type uncertainties. Even though our approach for robust performance analysis is conservative in general, we can reduce the conservatism gradually by artificially regarding the original N-periodic system as pN-periodic and increasing p. In addition, thanks to the simple structure of the LMI conditions, we can readily derive a viable test to verify the exactness of the computation results.

○Young Author's Award

Mr. Yutaka HORI (Student Member)

He received the B.E. degree from Dept. of Mathematical Engineering and Information Physics, School of Engineering, The University of Tokyo in 2008. He is currently pursuing a Master's degree at Dept. Information Physics and Computing, Graduate School of Information Science and Technology, The University of Tokyo. His research interests cover systems biology, control theory and signal processing.

受賞論文「On the Existence of Oscillatory Behavior in Gene Regulatory Networks with Cyclic Interconnections」
This paper is concerned with existence condition of periodic oscillations in cyclic gene regulatory networks. For this purpose, first, it is pointed out that change of the equilibrium point with respect to biochemical parameters is important for comprehensive analysis, and show the properties that the equilibrium point should satisfy. Then, we derive an analytic condition for the existence of periodic oscillations by using the properties. The derived condition has the following distinctive features: (i)It is analytically written only in terms of the system parameters, and (ii)it is applicable for cyclic gene regulatory networks consisting of any number of genes. Thus, biological interpretation of the result is easily obtained. In fact, it is concluded that cyclic gene regulatory networks tend to have periodic oscillations as the number of genes gets large.
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