%0 Journal Article
%T The poles method for second-order linear
	time-varying systems
%A Siwczyński, Maciej
%A Jaraczewski, Marcin
%J Czasopismo Techniczne
%V 2015
%R 10.4467/2353737XCT.15.343.4864
%N Mechanika Zeszyt 4-M (26) 2015
%P 123-130
%K linear systems, time-varying systems
%@ 0011-4561
%D 2016
%U https://ejournals.eu/czasopismo/czasopismo-techniczne/artykul/the-poles-method-for-second-order-linear-time-varying-systems
%X 
	In dynamic linear systems described by differential equations with constant parameters, the poles of the rational function (transfer function of the system) play an important role. This article attempts to expand the poles concept in a situation where the system is described by the second-order linear system with timevarying parameters. It then introduces the concept of characteristic equations and time-dependent poles.