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Time-delay systems: an overview of some recent advances and open problems. (English) Zbl 1145.93302
Summary: After presenting some motivations for the study of time-delay system, this paper recalls modifications (models, stability, structure) arising from the presence of the delay phenomenon. A brief overview of some control approaches is then provided, the sliding mode and time-delay controls in particular. Lastly, some open problems are discussed: the constructive use of the delayed inputs, the digital implementation of distributed delays, the control via the delay, and the handling of information related to the delay value.

##### MSC:
 93-02 Research monographs (systems and control) 93C23 Systems governed by functional-differential equations 93B12 Variable structure systems 34K20 Stability theory of functional-differential equations
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##### References:
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