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Artykuły w czasopismach na temat "Rotatable designs"

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Khuri, A. I. "Blocking with Rotatable Designs". Calcutta Statistical Association Bulletin 41, nr 1-4 (marzec 1991): 81–98. http://dx.doi.org/10.1177/0008068319910105.

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Kiwu, Lawrence Chizoba, Desmond Chekwube Bartholomew, Fidelia Chinenye Kiwu-Lawrence, Chukwudi Paul Obite i Okafor Ikechukwu Boniface. "Evaluating Percentage Rotatability For The Small Box – Behnken Design". Journal of Mathematics and Statistics Studies 2, nr 2 (13.08.2021): 16–24. http://dx.doi.org/10.32996/jmss.2021.2.2.3.

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Rotatability property for the Small Box-Behnken design is discussed in this paper. This paper aimed at applying a measure of obtaining percentage rotatability on the Small Box-Behnken designs to determine if the Small Box-behnken designs are rotatable or not and investigated the extent of rotatability in terms of percentage. The factors, q, considered range from 3 to 11. The results showed that for factors q, the Small Box-Behnken design is rotatable for q = 3 factors, near rotatable for q = 4, 7 factors and not rotatable for q = 5, 6, 8, 9, 10 and 11 factors.
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Mukerjee, Rahul. "On fourth order rotatable designs". Communications in Statistics - Theory and Methods 16, nr 6 (styczeń 1987): 1697–702. http://dx.doi.org/10.1080/03610928708829463.

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Shareef, R. Md Mastan. "A note on Variance-Sum Third Order Slope Rotatable Designs". International Journal for Research in Applied Science and Engineering Technology 9, nr 10 (31.10.2021): 760–66. http://dx.doi.org/10.22214/ijraset.2021.38512.

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Abstract: Response Surface Methodology (RSM) is a collection of mathematical and statistical techniques useful for analyzing experiments where the yield is believed to be influenced by one or more controllable factors. Box and Hunter (1957) introduced rotatable designs in order to explore the response surfaces. The analogue of Box-Hunter rotatability criterion is a requirement that the variance of i yˆ(x)/ x be constant on circles (v=2), spheres (v=3) or hyperspheres (v 4) at the design origin. These estimates of the derivatives would then be equally reliable for all points (x , x ,...,x ) 1 2 v equidistant from the design origin. This property is called as slope rotatability (Hader and Park (1978)).Anjaneyulu et al (1995 &2000) introduced Third Order Slope Rotatable Designs. Anjaneyulu et al(2004) introduced and established that TOSRD(OAD) has the additional interesting property that the sum of the variance of estimates of slopes in all axial directions at any point is a function of the distance of the point from the design origin. In this paper we made an attempt to construct Variance-Sum Third Order Slope Rotatable in four levels. Keywords: Response Surface Methodology. Third Order Slope Rotatable Design; TOSRD (OAD), Variance-Sum Third Order Slope Rotatable Design.
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Das, Rabindra Nath. "Robust Second Order Rotatable Designs : Part I". Calcutta Statistical Association Bulletin 47, nr 3-4 (wrzesień 1997): 199–214. http://dx.doi.org/10.1177/0008068319970306.

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In Panda and Das ( Cal. Statist. Assoc. Bull., 44, 1994, 83-101) a study of rotatable designs with correlated errors was initiated and a systematic study of first order rotatable designs was attempted. Various correlated structures of the errors were considered. This two-part article relates to a thorough study on robust second order rotatable designs (SORD's) under violation of the usual homoscedasticity assumption of the distribution of errors. Under a suitable autocorrelated structure of the dispersion matrix of the error components, we examine existence and construction of robust rotatable designs. In part I, general conditions for rotatability have been derived and special cases have been examined under autocorrelated structure of the errors. Starting with the usual SORD's (under the uncorrelated error setup), we have discussed a method of construction of SORD's with correlated errors under the autocorrelated structure. An illustrative example is given at the end. In part II,we propose to examine robustness of the usual SORD's with emphasis on properties such as weak rotatability, with due consideration as to the cost involved.
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Draper, Norman R., Berthold Heiligers i Friedrich Pukelsheim. "On optimal third order rotatable designs". Annals of the Institute of Statistical Mathematics 48, nr 2 (czerwiec 1996): 395–402. http://dx.doi.org/10.1007/bf00054798.

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Emily, Otieno-Roche. "Construction of Second Order Rotatable Simplex Designs". American Journal of Theoretical and Applied Statistics 6, nr 6 (2017): 297. http://dx.doi.org/10.11648/j.ajtas.20170606.16.

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Das, Rabindra Nath, Partha Pal i Sung H. Park. "Modified Robust Second-Order Slope-Rotatable Designs". Communications in Statistics - Theory and Methods 44, nr 1 (grudzień 2014): 80–94. http://dx.doi.org/10.1080/03610926.2012.732183.

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Mukerjee, Rahul, i S. Huda. "Fourth-order rotatable designs: A-optimal measures". Statistics & Probability Letters 10, nr 2 (lipiec 1990): 111–17. http://dx.doi.org/10.1016/0167-7152(90)90005-r.

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Babu, P. Seshu, i A. V. Dattatreya Rao. "ON THIRD ORDER SLOPE ROTATABLE DESIGNS USING PAIRWISE BALANCED DESIGNS". Far East Journal of Theoretical Statistics 63, nr 1 (10.11.2021): 29–37. http://dx.doi.org/10.17654/ts063010029.

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Rozprawy doktorskie na temat "Rotatable designs"

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Riahi, Nayereh. "Design, Optimization, And Feedback Control Of A Planar Noncontact Magnetic Manipulator With Rotatable Permanent Magnets". OpenSIUC, 2021. https://opensiuc.lib.siu.edu/dissertations/1940.

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This dissertation addresses different aspects of employing permanent magnets in the structure of noncontact magnetic manipulators. These systems employ controllable arrays of magnets to generate proper magnetic fields within their operation region and steer magnetic objects remotely without mechanical contact. This noncontact feature makes magnetic manipulators of particular interest in medical applications. They allow physicians to drive magnetic objects in closed and hard-to-reach environments including the human body for non- or minimally invasive diagnostic and therapeutic applications. As a case study, a magnetic manipulator composed of six diametrically magnetized permanent magnet cylinders is proposed. Each magnet in this scheme is equipped with an independent servomotor that can rotate as required. Number and size of the magnets for this proposed magnetic manipulator are then studied and optimized. An analytical model is introduced and employed to describe behavior of diametrically magnetized permanent magnet cylinders that are used in the proposed magnetic manipulator. Accuracy of this model is experimentally verified via employing real data extracted from a 3-axis magnetic field mapper. Dynamics of a magnetic object motion under the influence of magnetic force and resisting force in the proposed system are presented through a nonlinear set of state-space equations. Unstable nature of magnetic manipulators indicated by the describing equations, dictates utilizing feedback control as an essential part in magnetic manipulators. Thus, linear feedback control and nonlinear technique of feedback linearization are explored in this dissertation to address the control problem of steering a magnetic object by means of the proposed permanent magnetic manipulator. Performance of the linear feedback controller is improved through optimizing the equilibrium point for linearization purpose. To implement feedback linearization, two different methods are used resulting in approximate feedback linearization and exact feedback linearization. For the latter, nonlinear algebraic equations of the system are numerically solved via homotopy continuation technique. To enhance efficiency of this technique, scalar homotopy is also developed and its results are compared to vector homotopy, which is the basic approach to implement homotopy. Furthermore, direction control is developed in an open-loop manner to provide 3-D planar control of a magnetic object by means of the proposed magnetic manipulator.
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Macháček, Jan. "Design vysokozdvižného vozíku". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230502.

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Master thesis concerns with a design of forklift truck. The result proposed in the thesis uses existing technologies but combines them in new context to gain better qualities of a lift truck especially in relation to user-friendliness and ergonomics. Shaping works on functional demands which are understood as a basis for further developments towards the aesthetical outcome.
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Gonçalves, Rafael Henrique. "Aplicação da metodologia de superfície de resposta na otimização da remediação de um solo arenoso contaminado com cobre /". Rio Claro : [s.n.], 2009. http://hdl.handle.net/11449/92744.

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Orientador: José Ricardo Sturaro
Banca: Paulo Milton Barbosa Landim
Banca: Adriana Cavalieri Sais
Resumo: A contaminação de solos por metais pesados constitui-se em um problema ambiental que, geralmente, produz riscos permanentes à saúde humana e aos sistemas ecológicos, portanto com freqüente necessidade de intervenção por meio de tecnologias de remediação. Uma de tecnologias alternativas para a remediação de solos contaminados com metais pesados é a lavagem de solos in situ, cujo processo de remoção de contaminantes do solo envolve a percolação de uma solução extratora. Este trabalho propõe o emprego da metodologia de superfície de resposta para ajustar um modelo que aponte combinações entre os parâmetros da solução extratora - concentração de etileno diaminotetraacético dissódico (Na2EDTA), volume e pH da solução extratora - que possibilitem reduzir a concentração de cobre de um solo arenoso, a níveis de risco inferiores aos valores de intervenção para os cenários de exposição adotados pela Companhia Ambiental do Estado de São Paulo. Para tanto, realizou-se uma série de ensaios de lixiviação em coluna utilizando-se um Neossolo Flúvico artificialmente contaminado (1257,3 mg kg-1). Os ensaios foram conduzidos em triplicata e configuraram um arranjo experimental do tipo planejamento composto central rotacional, composto por 15 diferentes combinações dos parâmetros da solução extratora e de uma replicata no ponto central. Os resultados obtidos mostraram que a metodologia de superfície de resposta possibilitou o ajuste de um modelo, que aponta combinações de concentração de Na2EDTA, volume e pH da solução extratora que permitem reduzir a concentração de cobre de um determinado Neossolo Flúvico a valores inferiores aos dispostos pela Companhia Ambiental do Estado de São Paulo, para os cenários de exposição industrial, residencial, agrícola ou de proteção máxima.
Abstract: The soil contamination by heavy metals is an environmental problem that usually produces permanent risk to human health and ecological systems that often need the intervention through remediation technologies. An alternative remediation technology for soils contaminated with heavy metals is the soil flushing, which the contaminant removing process involves the percolation of an extraction solution. This work proposes the use of response surface methodology to adjust a model that points out combinations among the parameters of the extraction solution -ethylenediaminetetraacetic disodium (Na2EDTA) concentration, volume e pH of extraction solution -to reduce the concentration of copper in a sandy soil to risk levels lower than the intervention levels for exposure scenarios adopted by Environmental Company of Sao Paulo State. Thus, a series of tests in leaching column was carried out using a Fluvisol artificially contaminated (1257,3 mg kg-1). The tests were conducted in triplicate and setup an experimental array of type central composite rotatable design, composed of 15 different combinations of the parameters of the extraction solution and one replicate in the center point. The results showed that the response surface methodology allowed the fit of a model that identifies combinations of Na2EDTA concentration, volume and pH of the extraction solution to reduce the concentration of copper in a Fluvisol to values lower than those adopted by Environmental Company of Sao Paulo State for the exposure scenarios, namely industrial, residential, agricultural or maximum protection.
Mestre
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Gonçalves, Rafael Henrique [UNESP]. "Aplicação da metodologia de superfície de resposta na otimização da remediação de um solo arenoso contaminado com cobre". Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/92744.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
A contaminação de solos por metais pesados constitui-se em um problema ambiental que, geralmente, produz riscos permanentes à saúde humana e aos sistemas ecológicos, portanto com freqüente necessidade de intervenção por meio de tecnologias de remediação. Uma de tecnologias alternativas para a remediação de solos contaminados com metais pesados é a lavagem de solos in situ, cujo processo de remoção de contaminantes do solo envolve a percolação de uma solução extratora. Este trabalho propõe o emprego da metodologia de superfície de resposta para ajustar um modelo que aponte combinações entre os parâmetros da solução extratora – concentração de etileno diaminotetraacético dissódico (Na2EDTA), volume e pH da solução extratora – que possibilitem reduzir a concentração de cobre de um solo arenoso, a níveis de risco inferiores aos valores de intervenção para os cenários de exposição adotados pela Companhia Ambiental do Estado de São Paulo. Para tanto, realizou-se uma série de ensaios de lixiviação em coluna utilizando-se um Neossolo Flúvico artificialmente contaminado (1257,3 mg kg-1). Os ensaios foram conduzidos em triplicata e configuraram um arranjo experimental do tipo planejamento composto central rotacional, composto por 15 diferentes combinações dos parâmetros da solução extratora e de uma replicata no ponto central. Os resultados obtidos mostraram que a metodologia de superfície de resposta possibilitou o ajuste de um modelo, que aponta combinações de concentração de Na2EDTA, volume e pH da solução extratora que permitem reduzir a concentração de cobre de um determinado Neossolo Flúvico a valores inferiores aos dispostos pela Companhia Ambiental do Estado de São Paulo, para os cenários de exposição industrial, residencial, agrícola ou de proteção máxima.
The soil contamination by heavy metals is an environmental problem that usually produces permanent risk to human health and ecological systems that often need the intervention through remediation technologies. An alternative remediation technology for soils contaminated with heavy metals is the soil flushing, which the contaminant removing process involves the percolation of an extraction solution. This work proposes the use of response surface methodology to adjust a model that points out combinations among the parameters of the extraction solution –ethylenediaminetetraacetic disodium (Na2EDTA) concentration, volume e pH of extraction solution –to reduce the concentration of copper in a sandy soil to risk levels lower than the intervention levels for exposure scenarios adopted by Environmental Company of Sao Paulo State. Thus, a series of tests in leaching column was carried out using a Fluvisol artificially contaminated (1257,3 mg kg-1). The tests were conducted in triplicate and setup an experimental array of type central composite rotatable design, composed of 15 different combinations of the parameters of the extraction solution and one replicate in the center point. The results showed that the response surface methodology allowed the fit of a model that identifies combinations of Na2EDTA concentration, volume and pH of the extraction solution to reduce the concentration of copper in a Fluvisol to values lower than those adopted by Environmental Company of Sao Paulo State for the exposure scenarios, namely industrial, residential, agricultural or maximum protection.
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Brandão, Kiany Sirley Ribeiro. "OTIMIZAÇÃO DO PROCESSO DE PRODUÇÃO DE BIODIESEL METÍLICO E ETÍLICO DO ÓLEO DE MAMONA (Ricinus Communis L.) APLICANDO UM DELINEAMENTO COMPOSTO CENTRAL ROTACIONAL (DCCR)". Universidade Federal do Maranhão, 2007. http://tedebc.ufma.br:8080/jspui/handle/tede/895.

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The biodiesel is a biofuel obtained from renewable sources, as vegetable oils and animal fats. The castor seeds (Ricinus communis L.) have a medium content of oil of 47%. This oil when transformed in biodiesel produces a fuel with a series of environmental advantages in relation to petroleum diesel. Therefore in this work it was made the optimization of the production process of the methyl and ethyl biodiesel from castor oil, varying the reaction time, the catalyst amount and the oil:alcohol ratio (methanol or ethanol) using a Central Rotatable Composite Design (CRCD) symmetrical and of second order, constituted of two parts: the factorial 2n, with central points, and the axial part. With base in this factorial planning, surfaces and curves of responses and variance analysis, it was evaluated the effects and the significance of the models for the responses variables, biodiesel yield in mass and the esters content. For the production of methyl biodiesel, the greater biodiesel yield in mass is reached when oil/methanol molar ratio 1:4-1:5; 0,4-1,2% of KOH and time reaction 20-100 min, is used. In function of the esters content, the oil/methanol molar ratio should be between 1:10 and 1:11,36, KOH concentration between 1,4 and 2,34 and reaction time between 120 and 140 min. The regression models of the methyl biodiesel for ANOVA appropriately explained at the level of 95%, the data variation (R2 = 0,90567, for yield biodiesel and R2 = 0,7654, for the esters content). For the production of the ethyl biodiesel, the results of the factorial planning 23 showed that the oil/ethanol ratio and the KOH concentration went statisticaly significant to the biodiesel yield in mass and content of esters. The maximum yield can be reached when oil/ethanol molar ratio between 1:10,4 and 1:12,35; 1,4 to 2% of KOH and 60- 100 min of reaction, is used. In function of the esters content, the oil/ethanol molar ratio should be between 1:10,5 and 1:12,35, concentration of KOH between 1,4 and 2,0 % and time of reaction between 60 and 120 min. The regression models explained the variation of the data appropriately (R2 = 0,71811, for biodiesel yield and for esters content, R2 = 0,95217) and they acted significantly, to 95% of trust limit, the relationship between the independent variables and the response. The samples of the methyl and ethyl biodiesel of castor oil, in the optimized conditions, they are inside of the limits preset by National Agency of the Petroleum, Natural Gas and Biofuels.
O biodiesel é um biocombustível obtido a partir de fontes renováveis como óleos vegetais e gorduras animais. As sementes de mamona (Ricinus communis L.) possuem um teor médio de óleo de 47 %, que ao ser transformado em biodiesel produz um combustível com uma série de vantagens ambientais em relação ao diesel de petróleo. Portanto neste trabalho fez-se a otimização do processo de produção do biodiesel metílico e etílico a partir de óleo de mamona, variando o tempo de reação, a quantidade de catalisador e a relação de óleo:álcool (metanol ou etanol) empregando um Delineamento Composto Central Rotacional (DCCR) simétrico e de segunda ordem, constituído de duas partes: o fatorial 2n, com pontos centrais, e a parte axial. Com base neste planejamento fatorial, superfícies e curvas de respostas e análise de variância foram realizadas a avaliação dos efeitos e a significância dos modelos para as variáveis de respostas, rendimento em massa do biodiesel e o teor de ésteres. Para a produção de biodiesel metílico, o maior rendimento em massa de biodiesel é alcançado quando se usa razão molar óleo/metanol 1:4-1:5; 0,4-1,2 % de KOH e 20-100 min de reação. Em função do teor de ésteres, a razão molar óleo:metanol deve estar entre 1:10 e 1:11,36, concentração de KOH entre 1,4 e 2,34 e tempo de reação entre 120 e 140 min. Os modelos de regressão do biodiesel metílico avaliados pela ANOVA explicaram adequadamente ao nível de 95%, a variação dos dados (R2 = 0,90567, para rendimento biodiesel e R2 = 0,7654, para o teor de ésteres). Para a produção do biodiesel etílico, os resultados do planejamento fatorial 23 mostraram que a razão óleo:etanol e a concentração de KOH foram estatisticamente significativos para o rendimento em massa de biodiesel e teor de ésteres. O máximo rendimento pode ser alcançado quando se usa razão molar óleo/etanol entre 1:10,4 e 1:12,35; 1,4 a 2 % de KOH e 60-100 min de reação. Em função do teor de ésteres, a razão molar óleo:etanol deve estar entre 1:10,5 e 1:12,35, concentração de KOH entre 1,4 e 2,0 % e tempo de reação entre 60 e 120 min. Os modelos de regressão explicaram adequadamente a variação dos dados (R2 = 0,71811, para rendimento biodiesel e para o teor de ésteres, R2 = 0,95217) e representaram significativamente, a 95% de limite de confiança, a relação entre as variáveis independentes e a resposta. As amostras do biodiesel metílico e etílico de mamona, nas condições otimizadas, encontram-se dentro dos limites preestabelecidos pela Agência Nacional do Petróleo, Gás Natural e Biocombustíveis.
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Awadallak, Jamal Abd. "Uso de ultrassom na hidrólise enzimática do óleo de palma: síntese de diacilglicerol". Universidade Estadual do Oeste do Parana, 2012. http://tede.unioeste.br:8080/tede/handle/tede/1901.

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Diacylglycerol rich oils have its organoleptic characteristics very similar to those of conventional edible oils, but these oils do not tend to accumulate in the body, even when consumed in high quantities, making them a great resource in the fight against obesity. Palm oil ranks first the world production of edible oils mainly due to its low cost. This work aimed to propose a new technology for enzyme production using diacylglycerol lipase Lipozyme RM IM and ultrasound to promote water in oil emulsions, which increases the interfacial area of the system leading to higher reaction rates compared to conventional enzymatic processes. . The reactions were carried out at 55 °C with two different methods. First, the reaction system was exposed to ultrasonic waves for the whole reaction time, which led to enzymatic inactivation and water evaporation. Ultrasound was then used to promote emulsification of the water/oil system before the hydrolysis reaction, avoiding contact between the probe and the enzymes. Achieved conversions were superior to the conventional method further hydrolysis rate when the ultrasound is employed for emulsion formation was significantly greater. For 12 hours of reaction the conversion was 85% higher than the conventional method and 15% higher for a period of 24 hours of reaction. . An experimental design was used to optimize the ultrasound-related parameters and maximize the hydrolysis rate, and in these conditions, with a change in equilibrium, DAG production was evaluated.Better reaction conditions were achieved for the second method: 11.20 wt% (water+oil mass) water content, 1.36 wt% (water+oil mass) enzyme load, 12 h of reaction time, 1.2 min and 200 W of exposure to ultrasound. In these conditions diacylglycerol yield was 37.69 wt%.
Óleos enriquecidos com diacilglicerol possuem características organolépticas muito semelhantes às dos óleos comestíveis convencionais, porém, estes óleos não tendem a se acumular no organismo, mesmo quando consumidos em altas quantidades, tornando-os um grande recurso no combate à obesidade. O óleo de palma está no topo da produção mundial de óleos comestíveis principalmente devido ao seu baixo custo. Este trabalho teve como objetivo propor uma nova tecnologia para a produção enzimática de diacilglicerol empregando a lipase Lipozyme RM IM e utilizando ultrassom como gerador de emulsões de água em óleo, o que aumenta a área interfacial do sistema conduzindo a maiores taxas de reação em relação aos processos enzimáticos convencionais. A hidrólise parcial do óleo de palma foi realizada em meio livre de solventes a 55 °C em duas etapas distintas e comparadas com reações em condições semelhantes sem o uso do ultrassom. Primeiramente o sistema reacional foi exposto às ondas ultrassônicas, o que levou a taxas iniciais de reação elevadas, porém, as conversões obtidas foram baixas, em função da desativação enzimática e da evaporação de água, pelo longo período de exposição ao ultrassom. Posteriormente, utilizou-se o ultrassom para gerar emulsões antes a etapa reacional, não permitindo seu contato com o sistema contendo a enzima. As conversões obtidas foram superiores ao método convencional, além disso, taxa de hidrólise quando se empregou o ultrassom para a formação de emulsões foi significativamente maior. Para 12 horas de reação a conversão foi 85% superior ao método convencional e de 15% superior para um período de 24 horas de reação. Foi desenvolvido um planejamento fatorial, o delineamento central composto rotacional para avaliar os efeitos das variáveis tempo de exposição ao ultrassom, potência do ultrassom e razão água/óleo na conversão em ácidos graxos livres da reação, sendo que a razão água/óleo e o produto tempo x potência apresentaram os maiores efeitos. Nas melhores condições, foi produzido um óleo concentrado com 37,69% de DAG em de 12h de reação, exposto ao ultrassom por 1,2min à 200W.
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Sanders, Elizabeth Rose. "Minimum bias estimation for first and second order rotatable response surface designs". 1986. http://catalog.hathitrust.org/api/volumes/oclc/13908764.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1986.
Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 131-136).
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LI, MING-CHANG, i 李明昌. "A study on global precision rotatable central composite design and rotatable evolutionary operation". Thesis, 1990. http://ndltd.ncl.edu.tw/handle/95933092954109707837.

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Min-SinYang i 楊明新. "Design and Analysis of Passively Rotatable Deflector Diversion Tail for Tidal-Current Power Generation Turbine". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/7s9552.

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Streszczenie:
碩士
國立成功大學
工程科學系
107
In this study, a deflector that can passively rotate was designed for a tidal-current power generation turbine, where when the flow direction changes, the deflector can rotate with the current direction. The rotation of the turbine and deflector was simulated with commercially available Fluent finite element analysis software and calculated the power and torque generated by the turbine. Finally, the accuracy of the simulation results was verified through experiments. The simulation results show that the deflector can rotate stably when a simulation diversion tail is added to the top of the deflector. When the diversion tail was added to the side of a deflector, the deflector could rotate faster but the rotational speed was not stable. Therefore, based on the simulation results, the best design would be where the diversion tail is placed on the top of the deflector.
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Chien-FengHuang i 黃建峰. "Design and Implementation of Object Grasping and Control Strategy for Home Service Robot with Rotatable Waist". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/45855495402076769332.

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碩士
國立成功大學
電機工程學系碩博士班
101
This thesis mainly presents the design and implementation of object grasping and control strategy for home service robot that includes a rotatable waist. Firstly, the hardware architecture of the home service robot, named May, is described. The robot May has several sensors comprising Kinect, microphone, laser range finder, and ultrasonic ranging module. She exploits a notebook computer as central processing unit to connect sensors, 6-DOF arms, 2-DOF neck, rotatable waist, and the four-wheel independent steering and four-wheel independent drive mobile platform. In order to increase the coverage of grasping, this thesis proposes the Q-learning controller to find the most suitable angle of waist for grasping the object. By the grasping strategy, the position of end-effector is calibrated using an ultrasonic ranging module. Moreover, in order to avoid overload of servo motors, the home service robot May is able to utilize the other arm to assist when the object is really heavy. Finally, the applicability and validity of object grasping and control strategy are demonstrated both in laboratory experiments and the competitions of robot@home league at RoboCup Japan Open 2013 Tokyo.
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Części książek na temat "Rotatable designs"

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Kiefer, J. "Optimum Experimental Designs V, with Applications to Systematic and Rotatable Designs". W Collected Papers III, 103–27. New York, NY: Springer New York, 1985. http://dx.doi.org/10.1007/978-1-4615-6660-1_4.

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Galil, Z., i J. Kiefer. "Comparison of Rotatable Designs for Regression on Balls, I (Quadratic)". W Collected Papers III, 391–404. New York, NY: Springer New York, 1985. http://dx.doi.org/10.1007/978-1-4615-6660-1_23.

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Chen, Z. P., C. L. Wang, C. H. Zhang, Y. H. He, J. Y. Zhang, J. J. Shou, C. G. Li, P. Jia i Z. J. Sun. "Design of a Cable Driving System in Large Rotatable Cylindrical Antenna". W Proceedings of the Eighth Asia International Symposium on Mechatronics, 424–37. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1309-9_44.

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Chen, Z. P., P. Jia, C. G. Li, Y. H. He, J. Y. Zhang, J. J. Shou i C. L. Wang. "Configuration Design and Discrete Optimization of Large Rotatable Parabolic Cylindrical Antenna". W Proceedings of the Eighth Asia International Symposium on Mechatronics, 372–86. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1309-9_40.

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Khare, Divyansh, Kausadikar Varad Prashant i Santhakumar Mohan. "Design and Control of Mobile Robots with Two and Four Independent Rotatable Power Wheels". W Lecture Notes in Mechanical Engineering, 149–60. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1769-0_14.

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"WEAKLY ROBUST ROTATABLE DESIGNS". W Robust Response Surfaces, Regression, and Positive Data Analyses, 89–108. Chapman and Hall/CRC, 2014. http://dx.doi.org/10.1201/b16899-6.

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"OPTIMAL ROBUST SECOND-ORDER SLOPE ROTATABLE DESIGNS". W Robust Response Surfaces, Regression, and Positive Data Analyses, 125–42. Chapman and Hall/CRC, 2014. http://dx.doi.org/10.1201/b16899-8.

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Streszczenia konferencji na temat "Rotatable designs"

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Stumph, Herbert E., i Andrew P. Murray. "Defect-Free Slider-Crank Function Generation for 4.5 Precision Points". W ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/mech-14070.

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Abstract The well-established methodology for slider-crank function generation states that 5 precision points can be achieved with no structural error. The resulting designs, however, do not necessarily satisfy all of the kinematic requirements for designing the slider-crank linkages used to drive the ram of a mechanical press. First, solutions to the 5 precision point synthesis problem may not have the precision points on one circuit. Additionally, there is no guarantee of a fully rotatable input crank. In this paper we present 4.5 precision point synthesis, a modification to the 5 precision point methodology for designing slider-cranks with fully rotatable input links and all precision points on the same circuit. The 4.5 precision point function generation methodology is illustrated with an example.
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Ryder, Kenneth. "Simulation of Housing Separation in a Rotatable Mechanical Prosthetic Heart Valve". W ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0223.

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Abstract Today the mechanical heart valve prosthesis offers a number of advanced features which enhance the performance relative to the early valve designs. Most notable is the ability to rotate the valve housing in situ, that is after the valve is sewn in place [1]. In some cases, anatomical obstructions may exist which would preclude optimum valve function without proper valve orientation. Additionally, the position of the pivot mechanism relative to the coronary ostia is a placement constraint for some surgeons. Rotatability in situ offers the surgeon the ability to make decisions about final valve placement after the valve is in the anatomy as opposed to outside the chest during the suturing process. However, this advantage does not come without additional reliability requirements. The rotation feature requires the housing have mechanical clearance from the sewing cuff. Some designs feature sewing cuffs with stiffening elements and others do not. The structural reliability must be proven against a new set of potential failure modes.
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Cai, Jiaze, Hunter Denton i Moble Benedict. "Development of an Air-launched Tail-Sitter Unmanned Aerial Vehicle". W Vertical Flight Society 79th Annual Forum & Technology Display. The Vertical Flight Society, 2023. http://dx.doi.org/10.4050/f-0079-2023-17962.

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This paper describes the development and flight testing of the first-ever air-launched tail-sitter UAV platform. Integrated with VTOL capability, the platform can be launched from various platforms, perform long-endurance loiter tasks and low-speed or hover flight, and land vertically in limited spaces. This work covers the experimental exploration of possible rotatable-fin designs, which then converge to a coaxial thrust vectoring design. A platform featuring a coaxial propeller and a thrust-vectoring mechanism is combined with a conventional fixed-wing design to accomplish both vertical and horizontal flights. An innovative bird-wing-inspired wing folding mechanism is also proposed in this work. A control strategy capable of handling both vertical and horizontal flight has been proposed. A cascaded feedback control strategy was implemented on a 1.7-gram custom-designed autopilot to stabilize the vehicle attitude. The proposed platform uses the coaxial rotors and the thrust-vectoring mechanism to accomplish the control in pitch, roll, and yaw for both vertical and horizontal flight. An indoor flight test with aggressive pilot inputs was successfully performed to demonstrate the controllability of the aircraft. Additionally, transition flight testing has successfully demonstrated the vehicle's capability of transition flight using the proposed thrust-vectoring mechanism.
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Khelfa, Frank, Lukas Zimmer, Paul Motzki i Stefan Seelecke. "Development of a Reconfigurable End-Effector Prototype". W ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3788.

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Material handling is a crucial part of manufacturing and assembly in industry. In state-of-the-art handling systems, robots use various end-effectors to grip and transport different shapes of workpieces. The exchange process of fitted end-effectors to appropriate workpieces, often requires to interrupt the manufacturing process. From the prospective of economic efficiency, there is an inherent benefit creating a reconfigurable end-effector that is able to adjust automatically to different workpiece geometries. In this work a novel end-effector prototype based on shape memory alloys (SMA’s) is developed and experimentally validated. The end-effector prototype has four arms with two SMA driven reconfigurable degrees of freedom (DOF’s) to allow gripping of different workpiece shapes and geometries. Each arm is rotatable by 90 degrees (1. DOF) and uses a counterweight to relieve the SMA wire. The tip of the arm is driven by a separate SMA in a 20 degree range and it has a special locking mechanism to hold different positions without any flowing current. The designs of the actuator constructions are presented and a prototype is produced via rapid-prototyping. Future work will include the characterization of the second DOF and controlling the positions of both DOF’s by using a PID controller based on the SMA self-sensing ability.
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Tawk, Y., J. Costantine i C. G. Christodoulou. "A frequency reconfigurable rotatable microstrip antenna design". W 2010 IEEE International Symposium Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting. IEEE, 2010. http://dx.doi.org/10.1109/aps.2010.5561272.

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FRENCH, E. "Thermal design of rotatable cryogenic heat pipe joints". W 23rd Aerospace Sciences Meeting. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1985. http://dx.doi.org/10.2514/6.1985-68.

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Wang, Zhao, Jianfeng Wang, Cheng Zhang i Zhen Chen. "Design of double layer rotatable smart garage system". W International Conference on Intelligent Systems, Communications, and Computer Networks (ISCCN 2023), redaktorzy Lin Wang i Xiaogang Liu. SPIE, 2023. http://dx.doi.org/10.1117/12.2679576.

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Zhang, Aoyu, Bin Liu, John Liu i Tianyu Xie. "Design of a Rotatable One-Element Snake Bone for NOTES". W 2017 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dmd2017-3410.

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Over the past decade, natural orifice transluminal endoscopic surgery (NOTES) has developed out of a merger of endoscopy and surgery [1]. NOTES offers the advantages of avoiding external incisions and scars, reducing pain, and shortening recovery time by using natural body orifices as the primary portal of entry for surgeries [2]. The NOTES platform consists of a flexible, hollow body — enabling travel in the interior of the human body — and the distal end (head), the mechanical structure of which is based off of the snake bone. After the distal end passes through a natural orifice, through a transluminal opening of the stomach, vagina, bladder, or colon, and reaches the target working place in the peritoneal cavity, several therapeutic and imaging tools can be passed through the hollow conduit of the NOTES’ body for surgeries [3]. The traditional snake bone design presents two major problems. First, the movement is constrained to two bending degrees-of-freedom (DOF). A need to reorient the tool then often requires the entire body to be rotated by the physician, an unwieldly manipulation that both hinders convenience and results in imprecise control. Second, the traditional fabrication process is tedious and therefore lends to higher manufacturing costs; the bending joints must be first individually machined then assembled together piece-by-piece using rotation pins. We propose a novel design for the snake bone that introduces an additional DOF via rotation and is simple and cost-effective to machine. The revised snake bone design features rotation segments controlled by wires that a physician can readily manipulate for increased control and convenience. Further, because surgical tools that pass through the NOTES body conduit are also installed on snake bone structures, the introduction of rotation to the snake bone design increases each tool’s mobility and manipulation. This advance therefore presents the potential to decrease both the number of required tools and the overall diameter of the NOTES body. Finally, the body is machined as a single element and therefore minimizes the work of assembly.
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Araujo, Felipe F., Adaildo G. D'Assuncao, Luis F. V. T. Costa i William S. Alves. "Design of rotatable metasurface microstrip antenna with reconfigurable polarization". W 2017 International Applied Computational Electromagnetics Society Symposium - Italy (ACES). IEEE, 2017. http://dx.doi.org/10.23919/ropaces.2017.7916313.

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Wang, Cui, Wei Lin, Qinyu Zhang, Youqin Wang i Peisheng Wang. "Design of face tracking system based on rotatable camera". W 2014 12th International Conference on Signal Processing (ICSP 2014). IEEE, 2014. http://dx.doi.org/10.1109/icosp.2014.7015416.

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