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On positivity of singular regular linear time-delay time-invariant systems subject to multiple internal and external incommensurate point delays. (English) Zbl 1117.93034
Summary: This paper deals with the positivity properties of singular regular linear time-delay time-invariant systems subject to multiple internal and external incommensurate constant point delays. The main idea behind the investigation is that its main body is performed based on the construction of the whole state-space trajectory solution without using as usual equivalence or similarity transformations on the matrix of dynamics in order to split the state-trajectory solution into two parts, one being typically associated with a nilpotent matrix. In that way, the whole state trajectory solution contains impulsive terms associated with the initial conditions and inputs. Some extensions concerning positivity aspects are given for a special canonical form which separates the dynamics associated with the nilpotent matrix obtained from an equivalence transformation on the singular matrix of the dynamic system.

93C05 Linear systems in control theory
93C15 Control/observation systems governed by ordinary differential equations
93C70 Time-scale analysis and singular perturbations in control/observation systems
Full Text: DOI
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