Fioravanti, A.R.Bonnet, C.Özbay, HitayNiculescu, S. I.2016-02-082016-02-082012-08-140005-1098http://hdl.handle.net/11693/21277This paper aims to provide a numerical algorithm able to locate all unstable poles, and therefore the characterization of the stability as a function of the delay, for a class of linear fractional-order neutral systems with multiple commensurate delays. We start by giving the asymptotic position of the chains of poles and the conditions for their stability for a small delay. When these conditions are met, the root continuity argument and some simple substitutions allow us to determine the locations where some roots cross the imaginary axis, providing therefore the complete characterization of the stability windows. The same method can be extended to provide the position of all unstable poles as a function of the delay.EnglishDelay effectsFractional systemsNeutral systemsRoot-locusAsymptotic positionCommensurate delaysDelay effectsFractional systemsImaginary axisNeutral systemsNumerical algorithmsSimple substitutionTime-delay systemsAlgorithmsDelay control systemsPolesRoot lociStabilityArticle10.1016/j.automatica.2012.04.009