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Type: Journal article
Title: A variational approach to the analysis of dissipative electromechanical systems
Author: Allison, A.
Pearce, C.
Abbott, D.
Citation: PLoS One, 2014; 9(2):e77190-1-e77190-12
Publisher: Public Library of Science
Issue Date: 2014
ISSN: 1932-6203
Statement of
Andrew Allison, Charles E. M. Pearce, Derek Abbott
Abstract: We develop a method for systematically constructing Lagrangian functions for dissipative mechanical, electrical, and electromechanical systems. We derive the equations of motion for some typical electromechanical systems using deterministic principles that are strictly variational. We do not use any ad hoc features that are added on after the analysis has been completed, such as the Rayleigh dissipation function. We generalise the concept of potential, and define generalised potentials for dissipative lumped system elements. Our innovation offers a unified approach to the analysis of electromechanical systems where there are energy and power terms in both the mechanical and electrical parts of the system. Using our novel technique, we can take advantage of the analytic approach from mechanics, and we can apply these powerful analytical methods to electrical and to electromechanical systems. We can analyse systems that include non-conservative forces. Our methodology is deterministic, and does does require any special intuition, and is thus suitable for automation via a computer-based algebra package.
Rights: © 2014 Allison et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
RMID: 0020136465
DOI: 10.1371/journal.pone.0077190
Appears in Collections:Electrical and Electronic Engineering publications

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