# 시변 시간지연을 가지는 이산 선형 불확실성 시스템에 대한 보장 비용 제어

• Kim, Ki-Tae (School of and Electrical Engineering, and Computer Science Kyungpook National University) ;
• Cho, Sang-Hyun (School of and Electrical Engineering, and Computer Science Kyungpook National University) ;
• Lee, Sang-Kyung (Department of Automation Systems, Doowon Technical College) ;
• Park, Hong-Bae (School of and Electrical Engineering, and Computer Science Kyungpook National University)
• 김기태 (慶北大學校 電子電氣컴퓨터學部) ;
• 조상현 (慶北大學校 電子電氣컴퓨터學部) ;
• 이상경 (斗源工科大學 自動化시스템科) ;
• 박홍배 (慶北大學校 電子電氣컴퓨터學部)
• Published : 2002.11.01

#### Abstract

This paper deals with the guaranteed cost control problems for a class of discrete-time linear uncertain systems with time-varying delay. The uncertain systems under consideration depend on time-varying norm-bounded parameter uncertainties. We address the existence condition and the design method of the memoryless state feedback control law such that the closed loop system not only is quadratically stable but also guarantees an adequate level of performance for all admissible uncertainties. Through some changes of variables and Schur complement, It is shown that the sufficient condition can be rewritten as an LMI(linear matrix inequality) form in terms of all variables.

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