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This paper reviews the static output feedback problem in the control of linear, time-invariant (LTI) systems. It includes analytical and computational methods and presents in a unified fashion, the knowledge gained in the decades of research into this most important problem.

This paper reviews the static output feedback problem in the control of linear, time-invariant LTI systems. It includes analytical and computational methods and presents in a uni ed fashion, the knowledge gained in the decades of research i n to this most important problem.

This paper expands on a method proposed in [1] for stabilising oscilatory system with positive, delayed feedback. The dosed-loop sytem obtained is shown (using the Nyquist criterion) to be stable for a range of delays.

In this paper we give an overview of non-fragile controller design for linear systems. The controller fragility problem is basically the problem of performance deterioration of a feedback control system due to inaccuracies in controller implementation. The literature on the fragility problem is reviewed and methods for designing non-fragile controllers are summarized. Papers presented on the subject in this invited session are also summarized.