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Lead-Lag compensators: analytical and graphical design on the Nyquist plane

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Authors
Zanasi, R.
Cuoghi, S.
Ntogramatzidis, Lorenzo
Date
2011
Type
Conference Paper

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Zanasi, R. and Cuoghi, S. and Ntogramatzidis, L. 2011. Lead-Lag compensators: analytical and graphical design on the Nyquist plane, in Astolfi, A. and Beard, R. (ed), 50th IEEE Conference on Decision and Control and European Control Conference (CDC-ECC), Dec 12-15 2011, pp. 4096-4101. Orlando, USA: IEEE.
Source Title
Proceedings of the 2011 50th IEEE Conference on Decision and Control and European Control Conference (CDC-ECC)
Source Conference
2011 50th IEEE Conference on Decision and Control and European Control Conference (CDC-ECC)
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Department of Mathematics and Statistics
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Abstract

This paper presents a design method for the synthesis of a general class of lead-lag compensators to exactly satisfy gain and phase margins specifications. A free parameter of the compensator is used as a degree of freedom in order to satisfy additional requirements on the phase and/or gain crossover frequencies. A graphical procedure for the compensator design on the Nyquist plane is presented with some numerical examples.