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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Systematic Design of a Reciprocating Tubular Linear Generator

Lin, Hsin-nan 31 August 2009 (has links)
The purpose of this research is to provide a systematic design of a reciprocating tubular linear generator, which is suitable for harvesting solar thermal energy and ocean wave energy. For the structure design of this generator, the stator utilizes a slotless structure, while the mover utilizes the quasi-Halbach permanent magnet array. The operational magnetic fields are first estimated by magnetic equivalent circuit analysis, and then confirmed by three-dimensional finite element analysis. Also, parameters of the machine structure are optimized by Taguchi¡¦s method. The stator windings are selected iteratively by operational specifications and constraints. Finally, assessments of the machine operational behaviors are performed to achieve a complete and systematic design.
2

Uma abordagem bayesiana para o método de controle on-line de Taguchi para atributos / A bayesian aproach of Taguchi´s On-line control method for attributes

Ramos, Leyla Costa 12 May 2008 (has links)
Nesse trabalho, apresentaremos o método econômico desenvolvido por Taguchi para monitoramento on line da qualidade para atributos. O propósito deste método é obter o intervalo de inspeção que minimiza o custo esperado por item produzido em um processo industrial. Em seguida, mostraremos o modelo alternativo proposto por Nayebpour e Woodall (1993) e a derivação dos estimadores de máxima verossimilhança e de Bayes desenvolvida por Borges, Esteves e Wechsler (2005). Finalmente, apresentaremos uma nova solução para o problema de determinação do intervalo de inspeção ótimo sob a perspectiva da Teoria de Decisão Bayesiana. A última solução será ilustrada com alguns exemplos. / In this work, we present Taguchi\'s economic on line quality monitoring method for attributes. The aim of this method is to obtain the inspection interval that minimizes the expected cost per item produced in an industrial process. After that, we will consider the alternative method proposed by Nayebpour e Woodall (1993) and the derivation of the maximum likelihood and Bayes estimators developed by Borges, Esteves e Wechsler (2005). Finally, we will propose a new solution to the problem of inspection interval determination through Bayesian Decision Theory. This last solution will be implemented and its performance will be illustrated with a few examples.
3

Uma abordagem bayesiana para o método de controle on-line de Taguchi para atributos / A bayesian aproach of Taguchi´s On-line control method for attributes

Leyla Costa Ramos 12 May 2008 (has links)
Nesse trabalho, apresentaremos o método econômico desenvolvido por Taguchi para monitoramento on line da qualidade para atributos. O propósito deste método é obter o intervalo de inspeção que minimiza o custo esperado por item produzido em um processo industrial. Em seguida, mostraremos o modelo alternativo proposto por Nayebpour e Woodall (1993) e a derivação dos estimadores de máxima verossimilhança e de Bayes desenvolvida por Borges, Esteves e Wechsler (2005). Finalmente, apresentaremos uma nova solução para o problema de determinação do intervalo de inspeção ótimo sob a perspectiva da Teoria de Decisão Bayesiana. A última solução será ilustrada com alguns exemplos. / In this work, we present Taguchi\'s economic on line quality monitoring method for attributes. The aim of this method is to obtain the inspection interval that minimizes the expected cost per item produced in an industrial process. After that, we will consider the alternative method proposed by Nayebpour e Woodall (1993) and the derivation of the maximum likelihood and Bayes estimators developed by Borges, Esteves e Wechsler (2005). Finally, we will propose a new solution to the problem of inspection interval determination through Bayesian Decision Theory. This last solution will be implemented and its performance will be illustrated with a few examples.

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