Browsing by Subject "Control system stability"
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Item Open Access Sensitivity minimization by stable controllers for a class of unstable time-delay systems(IEEE, 2006) Gümüşsoy, S.; Özbay, HitayIn this paper sensitivity minimization problem is considered for a class of unstable time delay systems. Our goal is to find a stable controller stabilizing the feedback system and giving rise to smallest H∞ norm for the sensitivity function. This problem has been solved by Ganesh and Pearson (1986) for finite dimensional plants using Nevanlinna-Pick interpolation. We extend their technique to include possibly unstable time delay systems. Moreover, we illustrate suboptimal solutions, and their robust implementation.Item Open Access Stability of delayed feedback controllers for discrete time systems(IEEE, 2003) Morgül, ÖmerWe consider the delayed feedback control (DFC) scheme for one dimensional discrete time systems. To analyze the stability, we construct a map whose fixed points correspond to the periodic orbits of the system to be controlled. Then the stability of the DFC is equivalent to the stability of the corresponding equilibrium point of the constructed map.