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Continuous-time lossless systems, boundary interpolation and pivot structures

Abstract : Balanced realizations of lossless systems can be generated from the tangential Schur algorithm using linear fractional transformations. In discrete-time, canonical forms with pivot structures are obtained by interpolation at in finity. In continuous-time case interpolation at infi nity is on the stability boundary, leading to an angular derivative interpolation problem. In the scalar case, the balanced canonical form of Ober can be recovered in this way. Here we generalize to the multivariable case. It is shown that boundary interpolation can be regarded as a limit of classical interpolation with interpolation points tending to the imaginary axis. Some pivot structures can be generated, but no complete atlas is obtained. However, for input normal pairs an atlas of admissible pivot structures can be generated in a closely related way.
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https://hal.inria.fr/hal-00788428
Contributor : Martine Olivi <>
Submitted on : Thursday, March 28, 2013 - 10:48:24 AM
Last modification on : Monday, June 15, 2020 - 1:38:03 PM
Document(s) archivé(s) le : Saturday, April 1, 2017 - 11:58:51 PM

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Ralf L.M. Peeters, Martine Olivi, Bernard Hanzon. Continuous-time lossless systems, boundary interpolation and pivot structures. SSSC- 5th Symposium on System Structure and Control - 2013, Feb 2013, Grenoble, France. ⟨hal-00788428⟩

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