Enhancement to least square-based approach for time-domain unsteady aerodynamic approximation
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.2514/1.C035824 http://hdl.handle.net/11449/205906 |
Resumo: | The modeling of different problems in aeroelasticity requires a time-domain equation of motion, especially to design modern controllers and study nonlinear characteristics. Typically, unsteady aerodynamic forces are written in the (reduced) frequency domain and then rewritten using rational function approximations in the time domain. In this context, this Paper presents an investigation of this topic including a literature review of the Least Square method used to obtain the time-domain aeroelastic system. It discusses the physical meanings of the augmented aerodynamics states due to the lag terms. It proposes an approach to use a phase error-based index to measure the rational function approximations accuracy depending on the number of lag terms. The proposal allows the analyst to determine the number of lag parameters to establish a time-domain aeroelastic model of a specified accuracy. |
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Repositório Institucional da UNESP |
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Enhancement to least square-based approach for time-domain unsteady aerodynamic approximationThe modeling of different problems in aeroelasticity requires a time-domain equation of motion, especially to design modern controllers and study nonlinear characteristics. Typically, unsteady aerodynamic forces are written in the (reduced) frequency domain and then rewritten using rational function approximations in the time domain. In this context, this Paper presents an investigation of this topic including a literature review of the Least Square method used to obtain the time-domain aeroelastic system. It discusses the physical meanings of the augmented aerodynamics states due to the lag terms. It proposes an approach to use a phase error-based index to measure the rational function approximations accuracy depending on the number of lag terms. The proposal allows the analyst to determine the number of lag parameters to establish a time-domain aeroelastic model of a specified accuracy.São Paulo State University (UNESP) School of Engineering of Ilha SolteiraDuke UniversitySão Paulo State University (UNESP) School of Engineering of Ilha SolteiraUniversidade Estadual Paulista (Unesp)Duke UniversityRibeiro, Frederico A. [UNESP]Dowell, Earl H.Bueno, Douglas D. [UNESP]2021-06-25T10:23:17Z2021-06-25T10:23:17Z2021-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article111-124http://dx.doi.org/10.2514/1.C035824Journal of Aircraft, v. 58, n. 1, p. 111-124, 2021.1533-38680021-8669http://hdl.handle.net/11449/20590610.2514/1.C0358242-s2.0-85101127481Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Aircraftinfo:eu-repo/semantics/openAccess2021-10-22T13:22:07Zoai:repositorio.unesp.br:11449/205906Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-22T13:22:07Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Enhancement to least square-based approach for time-domain unsteady aerodynamic approximation |
title |
Enhancement to least square-based approach for time-domain unsteady aerodynamic approximation |
spellingShingle |
Enhancement to least square-based approach for time-domain unsteady aerodynamic approximation Ribeiro, Frederico A. [UNESP] |
title_short |
Enhancement to least square-based approach for time-domain unsteady aerodynamic approximation |
title_full |
Enhancement to least square-based approach for time-domain unsteady aerodynamic approximation |
title_fullStr |
Enhancement to least square-based approach for time-domain unsteady aerodynamic approximation |
title_full_unstemmed |
Enhancement to least square-based approach for time-domain unsteady aerodynamic approximation |
title_sort |
Enhancement to least square-based approach for time-domain unsteady aerodynamic approximation |
author |
Ribeiro, Frederico A. [UNESP] |
author_facet |
Ribeiro, Frederico A. [UNESP] Dowell, Earl H. Bueno, Douglas D. [UNESP] |
author_role |
author |
author2 |
Dowell, Earl H. Bueno, Douglas D. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Duke University |
dc.contributor.author.fl_str_mv |
Ribeiro, Frederico A. [UNESP] Dowell, Earl H. Bueno, Douglas D. [UNESP] |
description |
The modeling of different problems in aeroelasticity requires a time-domain equation of motion, especially to design modern controllers and study nonlinear characteristics. Typically, unsteady aerodynamic forces are written in the (reduced) frequency domain and then rewritten using rational function approximations in the time domain. In this context, this Paper presents an investigation of this topic including a literature review of the Least Square method used to obtain the time-domain aeroelastic system. It discusses the physical meanings of the augmented aerodynamics states due to the lag terms. It proposes an approach to use a phase error-based index to measure the rational function approximations accuracy depending on the number of lag terms. The proposal allows the analyst to determine the number of lag parameters to establish a time-domain aeroelastic model of a specified accuracy. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T10:23:17Z 2021-06-25T10:23:17Z 2021-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.2514/1.C035824 Journal of Aircraft, v. 58, n. 1, p. 111-124, 2021. 1533-3868 0021-8669 http://hdl.handle.net/11449/205906 10.2514/1.C035824 2-s2.0-85101127481 |
url |
http://dx.doi.org/10.2514/1.C035824 http://hdl.handle.net/11449/205906 |
identifier_str_mv |
Journal of Aircraft, v. 58, n. 1, p. 111-124, 2021. 1533-3868 0021-8669 10.2514/1.C035824 2-s2.0-85101127481 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Aircraft |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
111-124 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1792961570884550656 |