Flight Control Laws: Recent Advances in the Evaluation of their Robustness Properties.Report as inadecuate




Flight Control Laws: Recent Advances in the Evaluation of their Robustness Properties. - Download this document for free, or read online. Document in PDF available to download.

1 Toulouse - ONERA - The French Aerospace Lab

Abstract : This paper reviews a set of robustness analysis tools developed by the authors during the last decade to evaluate the robustness properties of high-dimensional closed-loop plants subject to numerous time-invariant uncertainties. These tools are used to compute both upper and lower bounds on the robust stability margin, the worst-case H∞ performance level, as well as the traditional gain, phase, modulus and time-delay margins. The key idea is to solve the problem on just a coarse frequency grid and to perform a fast validation on the whole frequency range, which results in guaranteed but conservative bounds on the aforementioned quantities. Some heuristics are then applied to determine a set of worst-case parametric configurations leading to over-optimistic bounds. A branch and bound scheme is finally implemented, so as to tighten these bounds with the desired accuracy, while still guaranteeing a reasonable computational complexity. The proposed algorithms are successfully assessed on a challenging real-world application: a flight control law validation problem.

Mots-clés : ROBUSTESSE STABILITE COMMANDE VOL TOOLBOX MATLAB MAILLAGE FREQUENTIEL VALIDATION CALCUL AVION SOUPLE





Author: C. Roos - C. Döll - Jean-Marc Biannic -

Source: https://hal.archives-ouvertes.fr/



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