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정은태,김성미,권성하 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-
This paper presents an H∞controller design method for linear time-invariant systems with delayed state and control. Using the second method of Lyapunov, the stability for delayed systems is discussed. For delayed systems, we derive a sufficient condition of the bounded real lemma(BRL)which is similar to BRL for nondelayed systems. And the sufficient conditions for the existence of an output feedback H∞controller of any order are given in terms of three linear matrix inequalities(LMIs). Futhermore, we briefly explain how to construct such controllers from the positive definite solutions of their LMIs and give a simple example to illustrate the validity of the proposed design procedure.
權誠河 國立 昌原大學校 産業技術硏究所 1989 産技硏論文集 Vol.3 No.-
This paper proposes a robust model following control systems with nonlinear time varying plant, which realizes good properties such as asymptotic stability, disturbance rejection and model following with reduced sensitivity for plant parameter variation. This algorithm can be easily applied to the nonlinear multivariable control systems and the control structure is simple. As an example, the position control system of a pendulum is considered and its characteristics are examined by simulation.