City Research Online

Abstract

The paper deals with the redesign of passive electric networks by changes of single dynamic and non-dynamic elements which may retain or affect the natural topology of the network. It also deals with the effect of such changes on the natural dynamics of the network, the natural frequencies. The impedance and admittance modeling for passive electrical networks is used which provides a structured, symmetric, integral-differential description, which in the special cases of RC and RL networks is reduced to matrix pencil descriptions. The transformations on the network are expressed as those preserving, or modifying the two natural topologies of the network, the impedance graph and the admittance graph topologies. For the special cases of RC and RL networks, we consider the problem of the effect of changes of a single dynamic or non-dynamic element on the natural frequencies. Using the Determinantal Assignment Framework, it is shown that the family of single parameter variation problems is reduced to equivalent Root Locus problems with the possibility of fixed modes. An explicit characterization of the fixed modes is given, and a number of interesting properties of the spectrum are derived such as the interlacing property of poles and zeros for the entire family of Root Locus problems.

Publication Type:	Article
Additional Information:	This is the peer reviewed version of the following article: Berger T. Halikias G. Karcanias N. and (2015) Effects of dynamic and non-dynamic element changes in RC and RL networks, Int. J. Circ. Theor. Appl., 43, pages 36–59, which has been published in final form at http://dx.doi.org/10.1002/cta.1923. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Publisher Keywords:	passive networks; network redesign; matrix pencils; root locus; interlacing property; robustness
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Departments:	School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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