Caracterização dinâmica de um instrumento musical de cordas usando análise modal operacional
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Trabalho de conclusão de curso |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/15223 |
Resumo: | Although the electric guitar has been more and more an investigation object by the academy, there are still important conclusions missing regarding its dynamic characteristics. To offer a contribution over this panorama, a modal analysis was performed having a beam and a Squier by Fender Stratocaster 50 th Anniversary guitar as objects. Altogether with experimental bench tests, analytical and modeling strategies were employed to the AISI 1020 steel beam, while the musical instrument had its dynamics described only with the aid of empirical inputs. For the tests, impacts of unknown force were deployed on two locations of both objects, that were instrumented with four ADXL 335 accelerometers each and connected to a National Instruments cDAQ-9178 chassis equipped with a NI-9201 voltage modulus for the data acquisition. An Arduino UNO board was used as voltage source for the sensors. After data processing via MATLAB, the natural frequencies of 7.34, 65.43 and 107.35 Hz, respectively for the 1 st , 3 rd and 4 th vibrational modes of the beam and 56.08, 140.65, 185.50 and 210.90 Hz for the guitar’s 1 st , 2 nd , 3 rd and 4 th modes were obtained. An Output-only modal analysis (OOMA) Frequency Domain Decomposition (FDD) algorithm was performed for the beam and the guitar, resulting in correct shapes for the 1 st , 3 rd and 4 th beam modes and the 1 st , 2 nd and 3 rd guitar modes. It was verified that poor sensor positioning and implementation of the experiment hindered some of the result reached. In general, it was concluded that the FDD technique must be aligned to other excitation methods in order to fully work, while natural frequencies can be accessed through simpler methods. |
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Cerântola, Pedro de Campos MuradasShiki, Sidney Brucehttp://lattes.cnpq.br/0573973677787523http://lattes.cnpq.br/0701339863930950a2aed64a-36e1-4dee-8eb0-7a1e6c928f692021-12-01T17:20:10Z2021-12-01T17:20:10Z2019-12-20CERÂNTOLA, Pedro de Campos Muradas. Caracterização dinâmica de um instrumento musical de cordas usando análise modal operacional. 2019. Trabalho de Conclusão de Curso (Graduação em Engenharia Mecânica) – Universidade Federal de São Carlos, São Carlos, 2019. Disponível em: https://repositorio.ufscar.br/handle/ufscar/15223.https://repositorio.ufscar.br/handle/ufscar/15223Although the electric guitar has been more and more an investigation object by the academy, there are still important conclusions missing regarding its dynamic characteristics. To offer a contribution over this panorama, a modal analysis was performed having a beam and a Squier by Fender Stratocaster 50 th Anniversary guitar as objects. Altogether with experimental bench tests, analytical and modeling strategies were employed to the AISI 1020 steel beam, while the musical instrument had its dynamics described only with the aid of empirical inputs. For the tests, impacts of unknown force were deployed on two locations of both objects, that were instrumented with four ADXL 335 accelerometers each and connected to a National Instruments cDAQ-9178 chassis equipped with a NI-9201 voltage modulus for the data acquisition. An Arduino UNO board was used as voltage source for the sensors. After data processing via MATLAB, the natural frequencies of 7.34, 65.43 and 107.35 Hz, respectively for the 1 st , 3 rd and 4 th vibrational modes of the beam and 56.08, 140.65, 185.50 and 210.90 Hz for the guitar’s 1 st , 2 nd , 3 rd and 4 th modes were obtained. An Output-only modal analysis (OOMA) Frequency Domain Decomposition (FDD) algorithm was performed for the beam and the guitar, resulting in correct shapes for the 1 st , 3 rd and 4 th beam modes and the 1 st , 2 nd and 3 rd guitar modes. It was verified that poor sensor positioning and implementation of the experiment hindered some of the result reached. In general, it was concluded that the FDD technique must be aligned to other excitation methods in order to fully work, while natural frequencies can be accessed through simpler methods.Embora a guitarra elétrica venha sendo cada vez mais um objeto de investigação pela academia, faltam ainda conclusões contundentes a respeito de suas características dinâmicas. Para oferecer uma contribuição neste panorama, uma análise modal foi realizada tendo uma viga e uma guitarra Squier by Fender Stratocaster 50 th Anniversary como objetos. Juntamente com testes de bancada experimentais, estratégias de cálculo analítico e modelagem foram aplicadas à viga de aço AISI 1020, enquanto o instrumento teve sua dinâmica descrita apenas com o auxílio de dados de entrada experimentais. Para os testes, impactos de força desconhecida foram utilizados em dois locais de ambos os objetos, que foram instrumentados com quatro acelerômetros ADXL 335, todos conectados a um chassi National Instruments cDAQ-9178 equipado com um módulo medidor de tensão NI-9201. Uma placa de prototipagem Arduino UNO foi utilizada como fonte de tensão elétrica para os sensores. Após o processamento dos dados via MATLAB, as frequências naturais de 7,34, 65,43 e 107,35 Hz, respectivamente para o 1º , 3º e 4º modos de vibração da viga e 56,08, 140,65, 185,50 e 210,90 Hz para o 1º , 2º , 3º e 4º modos da guitarra foram obtidas. Um algoritmo de análise modal baseada apenas na resposta (OOMA) de decomposição no domínio da frequência (FDD) foi executado para a viga e para a guitarra, resultando nas formas corretas para o 1 o , 3 o e 4 o modos da viga e 1 o , 2 o e 3 o modos da guitarra. Foi verificado que o posicionamento falho dos sensores e aspectos da implementação do experimento prejudicaram alguns dos resultados obtidos. Em geral, concluiu-se que a técnica de FDD deve ser aliada a outros métodos de excitação para funcionar completamente, ao passo que as freqüências naturais podem ser alcançadas a partir de procedimentos mais simples.Não recebi financiamentoporUniversidade Federal de São CarlosCâmpus São CarlosEngenharia Mecânica - EMecUFSCarAttribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessVibrações mecânicasAnálise modal baseada apenas na respostaDecomposição no domínio da frequênciaGuitarra elétricaMechanical vibrationsOutput-only modal analysisFrequency domain decomposi-tionElectric guitarENGENHARIAS::ENGENHARIA MECANICA::MECANICA DOS SOLIDOSCaracterização dinâmica de um instrumento musical de cordas usando análise modal operacionalDynamic characterization of a string musical instrument using output-only modal analysisinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bachelorThesis600600e25bf601-09ae-4b03-9190-e9a2dfd85fb2reponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARCC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8811https://repositorio.ufscar.br/bitstream/ufscar/15223/2/license_rdfe39d27027a6cc9cb039ad269a5db8e34MD52ORIGINALTCC_2019-12_PCM_Cerantola.pdfTCC_2019-12_PCM_Cerantola.pdfapplication/pdf8888740https://repositorio.ufscar.br/bitstream/ufscar/15223/1/TCC_2019-12_PCM_Cerantola.pdfe64294d22ac09af89c058ab7421eeeeeMD51TEXTTCC_2019-12_PCM_Cerantola.pdf.txtTCC_2019-12_PCM_Cerantola.pdf.txtExtracted texttext/plain75033https://repositorio.ufscar.br/bitstream/ufscar/15223/3/TCC_2019-12_PCM_Cerantola.pdf.txtd086cc82200be7ddc3954f52fe0ec6fbMD53THUMBNAILTCC_2019-12_PCM_Cerantola.pdf.jpgTCC_2019-12_PCM_Cerantola.pdf.jpgIM Thumbnailimage/jpeg7019https://repositorio.ufscar.br/bitstream/ufscar/15223/4/TCC_2019-12_PCM_Cerantola.pdf.jpg46dbe12df928e39d2db69dbe2c3b2eedMD54ufscar/152232023-09-18 18:32:23.224oai:repositorio.ufscar.br:ufscar/15223Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:32:23Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Caracterização dinâmica de um instrumento musical de cordas usando análise modal operacional |
dc.title.alternative.eng.fl_str_mv |
Dynamic characterization of a string musical instrument using output-only modal analysis |
title |
Caracterização dinâmica de um instrumento musical de cordas usando análise modal operacional |
spellingShingle |
Caracterização dinâmica de um instrumento musical de cordas usando análise modal operacional Cerântola, Pedro de Campos Muradas Vibrações mecânicas Análise modal baseada apenas na resposta Decomposição no domínio da frequência Guitarra elétrica Mechanical vibrations Output-only modal analysis Frequency domain decomposi-tion Electric guitar ENGENHARIAS::ENGENHARIA MECANICA::MECANICA DOS SOLIDOS |
title_short |
Caracterização dinâmica de um instrumento musical de cordas usando análise modal operacional |
title_full |
Caracterização dinâmica de um instrumento musical de cordas usando análise modal operacional |
title_fullStr |
Caracterização dinâmica de um instrumento musical de cordas usando análise modal operacional |
title_full_unstemmed |
Caracterização dinâmica de um instrumento musical de cordas usando análise modal operacional |
title_sort |
Caracterização dinâmica de um instrumento musical de cordas usando análise modal operacional |
author |
Cerântola, Pedro de Campos Muradas |
author_facet |
Cerântola, Pedro de Campos Muradas |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/0701339863930950 |
dc.contributor.author.fl_str_mv |
Cerântola, Pedro de Campos Muradas |
dc.contributor.advisor1.fl_str_mv |
Shiki, Sidney Bruce |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0573973677787523 |
dc.contributor.authorID.fl_str_mv |
a2aed64a-36e1-4dee-8eb0-7a1e6c928f69 |
contributor_str_mv |
Shiki, Sidney Bruce |
dc.subject.por.fl_str_mv |
Vibrações mecânicas Análise modal baseada apenas na resposta Decomposição no domínio da frequência Guitarra elétrica |
topic |
Vibrações mecânicas Análise modal baseada apenas na resposta Decomposição no domínio da frequência Guitarra elétrica Mechanical vibrations Output-only modal analysis Frequency domain decomposi-tion Electric guitar ENGENHARIAS::ENGENHARIA MECANICA::MECANICA DOS SOLIDOS |
dc.subject.eng.fl_str_mv |
Mechanical vibrations Output-only modal analysis Frequency domain decomposi-tion Electric guitar |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA MECANICA::MECANICA DOS SOLIDOS |
description |
Although the electric guitar has been more and more an investigation object by the academy, there are still important conclusions missing regarding its dynamic characteristics. To offer a contribution over this panorama, a modal analysis was performed having a beam and a Squier by Fender Stratocaster 50 th Anniversary guitar as objects. Altogether with experimental bench tests, analytical and modeling strategies were employed to the AISI 1020 steel beam, while the musical instrument had its dynamics described only with the aid of empirical inputs. For the tests, impacts of unknown force were deployed on two locations of both objects, that were instrumented with four ADXL 335 accelerometers each and connected to a National Instruments cDAQ-9178 chassis equipped with a NI-9201 voltage modulus for the data acquisition. An Arduino UNO board was used as voltage source for the sensors. After data processing via MATLAB, the natural frequencies of 7.34, 65.43 and 107.35 Hz, respectively for the 1 st , 3 rd and 4 th vibrational modes of the beam and 56.08, 140.65, 185.50 and 210.90 Hz for the guitar’s 1 st , 2 nd , 3 rd and 4 th modes were obtained. An Output-only modal analysis (OOMA) Frequency Domain Decomposition (FDD) algorithm was performed for the beam and the guitar, resulting in correct shapes for the 1 st , 3 rd and 4 th beam modes and the 1 st , 2 nd and 3 rd guitar modes. It was verified that poor sensor positioning and implementation of the experiment hindered some of the result reached. In general, it was concluded that the FDD technique must be aligned to other excitation methods in order to fully work, while natural frequencies can be accessed through simpler methods. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019-12-20 |
dc.date.accessioned.fl_str_mv |
2021-12-01T17:20:10Z |
dc.date.available.fl_str_mv |
2021-12-01T17:20:10Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/bachelorThesis |
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bachelorThesis |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
CERÂNTOLA, Pedro de Campos Muradas. Caracterização dinâmica de um instrumento musical de cordas usando análise modal operacional. 2019. Trabalho de Conclusão de Curso (Graduação em Engenharia Mecânica) – Universidade Federal de São Carlos, São Carlos, 2019. Disponível em: https://repositorio.ufscar.br/handle/ufscar/15223. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/15223 |
identifier_str_mv |
CERÂNTOLA, Pedro de Campos Muradas. Caracterização dinâmica de um instrumento musical de cordas usando análise modal operacional. 2019. Trabalho de Conclusão de Curso (Graduação em Engenharia Mecânica) – Universidade Federal de São Carlos, São Carlos, 2019. Disponível em: https://repositorio.ufscar.br/handle/ufscar/15223. |
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https://repositorio.ufscar.br/handle/ufscar/15223 |
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Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
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openAccess |
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Universidade Federal de São Carlos Câmpus São Carlos Engenharia Mecânica - EMec |
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Universidade Federal de São Carlos Câmpus São Carlos Engenharia Mecânica - EMec |
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