A Method for Flexible Aircraft LFT Modelling

Abstract : 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.
Keywords : METHOD FLEXIBLE
Document type :
Conference papers
Complete list of metadatas

Cited literature [8 references]  Display  Hide  Download

https://hal-onera.archives-ouvertes.fr/hal-01060318
Contributor : Alain Broc <>
Submitted on : Wednesday, September 3, 2014 - 1:57:09 PM
Last modification on : Tuesday, March 26, 2019 - 2:28:03 PM
Long-term archiving on : Thursday, December 4, 2014 - 11:15:49 AM

File

DCSD1012.1291212475.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-01060318, version 1

Collections

Citation

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

Share

Metrics

Record views

318

Files downloads

509