A Method for Flexible Aircraft LFT Modelling - ONERA - Office national d'études et de recherches aérospatiales Access content directly
Conference Papers Year : 2009

A Method for Flexible Aircraft LFT Modelling


This paper presents a method to obtain a Linear Fractional Transformation (LFT) model from a set of numerical flexible aircraft models. The core of the method lies in a polynomial interpolation, but before this step, some cautious treatments must be applied to the numerical models for them to be interpolable. First the models have to be reduced to be exploitable, while ensuring they all keep the same consistent modal content and avoiding numerical problems. Second the interpolation of the reduced models state representations can only be processed if the state vector has the same physical meaning for the whole model set (state vector consistency). For this problem, a specific state coordinate transformation is emphasized. After models are interpolated, the LFT is computed with the LFR toolbox's generalized Morton method. Then the LFT accuracy can be improved through a biconvex optimization.


Fichier principal
Vignette du fichier
DCSD1012.1291212475.pdf (391.99 Ko) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-01060318 , version 1 (03-09-2014)


  • HAL Id : hal-01060318 , version 1


J. Torralba, F. Demourant, G. Puyrou, G. Ferreres. A Method for Flexible Aircraft LFT Modelling. European Control Conference, Aug 2009, BUDAPEST, Hungary. ⟨hal-01060318⟩


181 View
466 Download


Gmail Mastodon Facebook X LinkedIn More