Admissible short-time uncertainty in networked control systems

Increasing in number, busses and wireless networks are used as signal transmission in control systems. Networked control systems of this kind are characterized by occasional or arbitrary time delay or interruptions of minor loops. These influences are modelled as short-time uncertainties, in contrast to robust control systems in the literature, which are mainly studied as families with time-invariant uncertainties. Severe uncertainties are taken into consideration even if they cause short-time instability. An uncertainty can be valuated admissible if the accompanying signal amplitude or energy increase remains bounded. A third-order example with unstable behavior in a short-time interval is carried out in detail. I dedicate this article to my fellow professor O. Univ.-Prof. Dr. Gerfried Zeichen. Very affectionately yours, A. W.