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Symbolic and numerical software tools for LFT-based low order uncertainty modeling

Varga, Andras and Looye, Gertjan (1999) Symbolic and numerical software tools for LFT-based low order uncertainty modeling. In: Proceedings of CACSD'99, pp. 1-6. IEEE International Symposium on Computer-Aided Control System Design, 1999-08-22 - 1999-08-27, Hawaii (USA). ISBN ISBN 0-7803-5449-4.

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One of the main difficulties in applying modern control theories for designing robust controllers for linear uncertain plants is the lack of adequate models describing structured physical model uncertainties. We present a systematic approach for the generation of uncerteinty models described by linear fractional transformations (LFTs) and report on recently developed symbolic and numerical software to assist the generation of low order LFT-based uncertainty models. The kernel of the symbolic software is a Maple library for generation and manipulation of LFT models. Additional numerical tools for order reduction of LFT models are based on MATLAB and FORTRAN implenmentations of numerically reliable algorithms. Three examples of uncertainty modeling of aircraft dynamics illustrate the capabilities of the new software to solve high order uncertainty modeling problems.

Document Type:Conference or Workshop Item (Paper)
Additional Information:LIDO-Berichtsjahr=1999,
Title:Symbolic and numerical software tools for LFT-based low order uncertainty modeling
AuthorsInstitution or Email of Authors
Date:April 1999
Journal or Publication Title:Proceedings of CACSD'99
Page Range:pp. 1-6
ISBN:ISBN 0-7803-5449-4
Keywords:LFT, uncertainty modeling
Event Title:IEEE International Symposium on Computer-Aided Control System Design
Event Location:Hawaii (USA)
Event Type:international Conference
Event Dates:1999-08-22 - 1999-08-27
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignement
DLR - Research theme (Project):L -- no assignement
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Robotics and Mechatronics
Deposited By: elib DLR-Beauftragter
Deposited On:16 Mar 2006
Last Modified:12 Dec 2013 20:01

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