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dc.contributor.advisorTan, Jinglu, 1958-eng
dc.contributor.authorWaluyo, Srieng
dc.date.issued2010eng
dc.date.submitted2010 Falleng
dc.descriptionTitle from PDF of title page (University of Missouri--Columbia, viewed on April 30, 2014).eng
dc.descriptionTitle from PDF of title page (University of Missouri--Columbia, viewed on April 30, 2014).eng
dc.descriptionThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.eng
dc.descriptionVitaeng
dc.description.abstractA method for estimating the mechanical properties of a viscoelastic sample from ultrasound measurements was developed. The sample was represented as a mechanical network according to the Kelvin-Voigt model and linear state-space equations were derived to describe the system dynamics. Four parameters can be extracted by comparing the model with measured transmission waves. These parameters can be related to viscoelastic properties of the sample. Broadband pseudo-random binary sequences were designed and used to perturb the sample. The Levenberg-Marquardt method was employed to adjust the model parameters and the least-squares algorithm was used to obtain optimal model parameter estimates. Model verification showed that the algorithm developed could converge to known model parameters. Estimated model parameters showed consistency and reflected known facts about the materials tested. The model could capture the major dynamics of transmitted ultrasonic waves and allow repeatable estimation of model parameters. The model parameters could not only differentiate the materials tested but also follow expected trends of variation. The model parameters were useful for sensory crispness prediction and crispness was more correlated to the elastic modulus than to viscosity, which is consistent with existing research.eng
dc.format.extentxi, 131 pageseng
dc.identifier.oclcn/aeng
dc.identifier.urihttp://hdl.handle.net/10355/41909
dc.languageEnglisheng
dc.publisherUniversity of Missouri--Columbiaeng
dc.relation.ispartofcollectionUniversity of Missouri--Columbia. Graduate School. Theses and Dissertationseng
dc.source.originalSubmitted by University of Missouri--Columbia Graduate School.eng
dc.subjectUltrasoundeng
dc.subjectViscoelastic propertieseng
dc.subjectModulus elasticeng
dc.subjectViscosityeng
dc.subjectMechanical modeleng
dc.subjectCrispnesseng
dc.subject.FASTViscoelastic materialseng
dc.subject.FASTUltrasonic transducerseng
dc.subject.FASTUltrasonic testingeng
dc.titleA modeling approach to ultrasound evaluation of material propertieseng
dc.typeThesiseng
thesis.degree.disciplineBiological engineering (MU)eng
thesis.degree.grantorUniversity of Missouri--Columbiaeng
thesis.degree.levelDoctoraleng
thesis.degree.namePh. D.eng


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