# Frequency Domain Based Robust Flutter Analysis of Swept Back Wing Using μ Method

Arun Kumar, A and Onkar, AK (2021) Frequency Domain Based Robust Flutter Analysis of Swept Back Wing Using μ Method. In: Recent Advances in Computational Mechanics and Simulations, Singapore.

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## Abstract

The present work deals with the robust flutter analysis of a sweptback wing in frequency domain in the presence of various parametric uncertainties. The methodology adopted for the studies is based on the structured singular value ($$\mu$$) method. $$\mu$$ method requires valid description of various uncertainties associated with the aeroelastic system and then introducing these uncertainties to the nominal aeroelastic system in the form of a feedback loop. This feedback representation of uncertainties results in the Linear Fractional Transformation (LFT) model of the uncertain aeroelastic system which is then used for robust stability studies using $$\mu$$ method. This method is implemented in MATLAB and validation studies are carried out for 3DOF airfoil system in the presence of various structural and aerodynamic uncertainties. Further, the present method is extended to study the robust flutter of AGARD 445.6 sweptback wing in the presence of structural and aerodynamic uncertainties at various Mach numbers.

Item Type: Conference or Workshop Item (Paper) AGARD wing,Frequency domain,LFT,Robust flutter,3DOF airfoil ENGINEERING > Mechanical EngineeringENGINEERING > Structural Mechanics Smt Bhagya Rekha KA 11 Nov 2022 11:10 11 Nov 2022 11:10 http://nal-ir.nal.res.in/id/eprint/13661