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Enhanced LFR-toolbox for MATLAB and LFT-based gain scheduling

Hecker, Simon and Varga, Andras and Magni, Jean-Francios (2004) Enhanced LFR-toolbox for MATLAB and LFT-based gain scheduling. In: Proc. of ODAS 2004, pp. 80-89. 6th ONERA-DLR Aerospace Symposium, 2004-06-22 - 2004-06-23, Berlin (Germany).

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Abstract

We describe recent developments and enhancements of the LFR-Toolbox for MATLAB for building LFT-based uncertainty models and for LFT-based gain scheduling. A major development is the new LFT-object definition supporting a large class of uncertainty descriptions: continuous- and discrete-time uncertain models, regular and singular parametric expressions, more general uncertainty blocks (nonlinear, time-varying, etc.). By associating names to uncertainty blocks the reusability of generated LFT-models and the user friendliness of manipulation of LFR-descriptions have been highly increased. Significant enhancements of the computational efficiency and of numerical accuracy have been achieved by employing efficient and numerically robust Fortran implementations of order reduction tools via mex-function interfaces. The new enhancements in conjunction with improved symbolical preprocessing lead generally to a faster generation of LFT-models with significantly lower orders. Scheduled gains can be viewed as LFT-objects. Two techniques for designing such gains are presented. Analysis tools are also considered.

Document Type:Conference or Workshop Item (Paper)
Additional Information:LIDO-Berichtsjahr=2004,
Title:Enhanced LFR-toolbox for MATLAB and LFT-based gain scheduling
Authors:
AuthorsInstitution or Email of Authors
Hecker, SimonUNSPECIFIED
Varga, AndrasUNSPECIFIED
Magni, Jean-FranciosONERA Toulouse
Date:June 2004
Journal or Publication Title:Proc. of ODAS 2004
Page Range:pp. 80-89
Status:Published
Keywords:linear fractional transformation(LFT), scheduled control, MATLAB toolbox
Event Title:6th ONERA-DLR Aerospace Symposium
Event Location:Berlin (Germany)
Event Type:Other
Event Dates:2004-06-22 - 2004-06-23
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flexible Aircraft (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Robotics and Mechatronics > System Dynamics and Control (former Control Design Engineering)
Deposited By: elib DLR-Beauftragter
Deposited On:31 Jan 2006
Last Modified:12 Dec 2013 20:02

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