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Multiplicity-induced-dominancy property for second-order neutral differential equations with application in oscillation damping. (English) Zbl 1507.93193

Summary: This paper addresses the exponential stability of linear time-delay systems of neutral type. In general, it is quite a challenge to establish conditions on the parameters of the system in order to guarantee such a stability. Recent works emphasized the link between maximal multiplicity and dominant roots. Indeed, conditions for a given multiple root to be necessarily dominant are investigated, this property is known as multiplicity-induced dominancy (MID). The aim of this paper is to explore the effect of multiple roots with admissible multiplicities exhibiting, under appropriate conditions, the validity of the MID property for second-order neutral time-delay differential equations with a single delay. The ensuing control methodology is summarized in a five-steps algorithm that can be exploited in the design of higher-order systems. The main ingredient of the proposed method is the dominancy proof for multiple spectral values based on frequency bounds established via integral equations. As an illustration, the stabilization of the classical oscillator benefits from the obtained results.

MSC:

93D23 Exponential stability
93C23 Control/observation systems governed by functional-differential equations
34K35 Control problems for functional-differential equations
34K20 Stability theory of functional-differential equations
93C05 Linear systems in control theory
93C43 Delay control/observation systems

Software:

p3delta
Full Text: DOI

References:

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