Flutter analysis including structural uncertainties using a relaxed LMI-based approach

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.creatorRibeiro, Frederico A.-
Autor(es): dc.creatorDe Marqui Júnior, Carlos-
Autor(es): dc.creatorBueno, Douglas D.-
Data de aceite: dc.date.accessioned2025-08-21T23:39:58Z-
Data de disponibilização: dc.date.available2025-08-21T23:39:58Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-04-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s40430-023-04091-3-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/247000-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/247000-
Descrição: dc.descriptionThis paper proposes a new approach to investigate the flutter phenomenon considering structural frequencies as uncertain parameters. An affine parameter state space model is used to describe the aeroelastic system and linear matrix inequalities (LMI) are employed to solve the stability analysis with a relaxation on the inequalities. Uncertainties are present during the design phases of an aircraft as well as when considering an operational set of similar aircraft. In the first case, uncertain aeroelastic models have great potential to reduce computational costs during the design phases, and, in the second one, to provide robust aeroelastic predictions under uncertain operational quantities of a set of aircraft. In this work, uncertain aeroelastic predictions for a three-degrees-of-freedom typical section obtained from the relaxed approach are compared to predictions considering the quadratic Lyapunov approach. In the first case, the structural modal frequency of a single degree-of-freedom is considered uncertain. In the second one, all degrees-of-freedom are uncertain. In all cases, the numerical results show that the relaxed approach proposed in this work is less conservative than the quadratic Lyapunov approach, providing a useful tool for flutter analysis including structural uncertainties.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionDepartment of Mechanical Engineering São Paulo State University (Unesp), Av. Brasil, São Paulo-
Descrição: dc.descriptionDepartment of Aeronautical Engineering University of São Paulo (USP), Av. João Dagnone, São Paulo-
Descrição: dc.descriptionDepartment of Mechanical Engineering São Paulo State University (Unesp), Av. Brasil, São Paulo-
Descrição: dc.descriptionFAPESP: 2019/24729-6-
Descrição: dc.descriptionCNPq: 314151/2021-4-
Idioma: dc.languageen-
Relação: dc.relationJournal of the Brazilian Society of Mechanical Sciences and Engineering-
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Palavras-chave: dc.subjectAeroelasticity-
Palavras-chave: dc.subjectFlutter-
Palavras-chave: dc.subjectLinear Matrix Inequalities-
Palavras-chave: dc.subjectQuadratic stability-
Palavras-chave: dc.subjectRelaxation-
Palavras-chave: dc.subjectStability-
Palavras-chave: dc.subjectStructural uncertainty-
Título: dc.titleFlutter analysis including structural uncertainties using a relaxed LMI-based approach-
Tipo de arquivo: dc.typelivro digital-
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