Gotowe bibliografie tematyczne / Rotatable design

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Gotowa bibliografia na temat „Rotatable design”

Autor: Grafiati
Data publikacji: 8 września 2023

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Artykuły w czasopismach na temat "Rotatable design"

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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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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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Ugbe, Thomas Adidaumbe, Peter Akpan, Richmond Ofonodo i Edet Bassey. "On Evaluation of Three Basic Properties of Central Composite Design". Asian Journal of Probability and Statistics 23, nr 1 (7.06.2023): 1–15. http://dx.doi.org/10.9734/ajpas/2023/v23i1493.

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This work aims at making a choice of selecting the best property of central composite design (CCD). The three basic properties of CCD are rotatable, orthogonal and slope-rotatable with four optimality criteria; D, E, A and T. A complete 23 factorial experiment with increase in center points and non-replication of axial point was used for the entire work. The software applications used to run the analysis are Minitab and Excel. Minitab was used to create CCD with the respective center points and axial distances to fit the quadratic response polynomial. Excel was used to evaluate all the optimality criteria with respect to the properties of CCD and the efficiency of these criteria. Response surface graph was plotted to interpret how good the design is with the factors interaction. The result shows that A – optimality criterion is the best optimality criterion with respect to rotatable central composite design (RCCD), orthogonal central composite design (OCCD) and slope – rotatable central composite design (SRCCD) because of the increase in efficiency as the center point increases. Rotatable central composite design (RCCD) is considered in this context as the best property of central composite design in response surface methodology by comparing the increase in efficiency of the four optimality criteria as the center point increases.
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Streit, D. A., i B. J. Gilmore. "‘Perfect’ Spring Equilibrators for Rotatable Bodies". Journal of Mechanisms, Transmissions, and Automation in Design 111, nr 4 (1.12.1989): 451–58. http://dx.doi.org/10.1115/1.3259020.

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A new equilibrator design approach based on system potential energy functions is presented. This approach was used to discover a group of spring equilibrators which perfectly balance a rotatable rigid link at every orientation angle through 360 deg of link rotation. Springs are connected between a rotatable link and ground, where one end of each spring is connected to the rigid link and the other end of each spring is connected to ground. The rigid link is connected to ground by a pin joint and is free to rotate about that joint. The conditions for existence and the design equations for all equilibrators which fall into this category are developed and presented. Three designs appear to offer unique advantages over the infinite number of design options available.
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Arap Koske, J. K., i M. S. Patel. "A fourth order rotatable design in three dimensions". Communications in Statistics - Theory and Methods 15, nr 11 (styczeń 1986): 3435–44. http://dx.doi.org/10.1080/03610928608829320.

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Arap Koske, J. K. "A fourth order rotatable design in four dimensions". Communications in Statistics - Theory and Methods 16, nr 9 (styczeń 1987): 2747–53. http://dx.doi.org/10.1080/03610928708829536.

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Panda, Rajendranath. "Sequential Quality-Quantity Type Second Order Rotatable Design". Electronic Notes in Discrete Mathematics 15 (maj 2003): 138. http://dx.doi.org/10.1016/s1571-0653(04)00559-1.

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Choi, Byungjoo, Gwangjae Lee, Kyuhang Lee, Moon G. Lee i Yongho Jeon. "Design of rotatable direct energy deposition optical system". Journal of Mechanical Science and Technology 33, nr 4 (kwiecień 2019): 1833–39. http://dx.doi.org/10.1007/s12206-019-0335-9.

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Rotich, Jeremy, Mathew Kosgei i Gregory Kerich. "Optimal Third Order Rotatable Designs Constructed from Balanced Incomplete Block Design (BIBD)". Current Journal of Applied Science and Technology 22, nr 3 (14.07.2017): 1–5. http://dx.doi.org/10.9734/cjast/2017/34937.

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Xie, M. H., G. L. Zhu i Z. C. Duan. "Design of CNC System for Beam-Rotatable Grinding Machines". Key Engineering Materials 202-203 (czerwiec 2001): 479–84. http://dx.doi.org/10.4028/www.scientific.net/kem.202-203.479.

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Rozprawy doktorskie na temat "Rotatable design"

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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.
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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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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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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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Hyder, Md Nasim. "Preparation, Characterization and Performance of Poly(vinyl alcohol) based Membranes for Pervaporation Dehydration of Alcohols". Thesis, 2008. http://hdl.handle.net/10012/4014.

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Pervaporation (PV), a non-porous membrane separation process, is gaining considerable attention for solvent separation in a variety of industries ranging from chemical to food and pharmaceutical to petrochemicals. The most successful application has been the dehydration of organic liquids, for which hydrophilic membranes are used. However, during pervaporation, excessive affinity of water towards hydrophilic membranes leads to undesirable swelling (water absorption) of the membrane matrix. To control swelling, often hydrophilic membranes are crosslinked to modify physicochemical (surface and bulk) properties. Since the transport of species in pervaporation is governed by sorption (affected by surface and bulk properties) and diffusion (affected by bulk properties), it is essential to study the effect of crosslinking on the surface and bulk physicochemical properties and their effects on separation performance. This thesis focuses on the effect of crosslinking on the physicochemical properties (e.g., crystallinity, hydrophilicity, surface roughness) of hydrophilic polymeric membranes and their dehydration performance alcohol-water mixtures. Poly(vinyl alcohol), PVA was used as the base polymer to prepare membranes with various morphologies such as homogeneous, blended (with Chitosan, CS) and composite (with poly(sulfone), PSf) structures. Before applying the crosslinked membranes for the PV dehydration of alcohols, the physicochemical characterization were carried out using Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy (ATR-FTIR), X-Ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), tensile testing, contact angle and swelling experiments. The crosslinked membranes showed an increase in surface hydrophobicity from the contact angle measurements as compared to the uncrosslinked membranes. AFM surface topography showed that the membrane surfaces have nodular structures and are rough at the nanometer scale and affected by the crosslinking conditions such as concentration and reaction time. Surface hydrophobicity and roughness was found to increase with increasing degree of crosslinking. DSC measurements showed an increase in melting temperature of the polymer membranes after crosslinking. For the PV dehydration of ethanol, a decrease in flux and an increase in selectivity were observed with increase in the degree of crosslinking. Effects of membrane thickness (of PVA layer) for crosslinked PVA-PSf composite membranes were studied on PV dehydration of ethanol. Total flux and selectivity were statistically analyzed as a function of the membrane thickness. In general, the outcome agrees with the solution-diffusion (S-D) theory: the total flux was found to be significantly affected by the PVA layer thickness, while the selectivity remains nearly unaffected. Using the S-D theory, the mass transfer resistance of the selective layers was calculated and found to increase with thickness. The relatively small change observed for selectivity has been related to the crosslinking of the PVA layer that increases the surface hydrophobicity of the membrane. Chitosan-Poly(vinyl alcohol), or CS-PVA, blended membranes were prepared by varying the blending ratio to control membrane crystallinity and its effect on the PV dehydration of ethylene glycol. The blended membranes were crosslinked interfacially with trimesoyl chloride (TMC)/hexane. The crystallinity of the membrane was found to decrease with increasing CS wt% in the blend. Although the crosslinked CS-PVA blend membranes showed improved mechanical strength, they became less flexible as detected in tensile testing. The resulting crosslinked CS-PVA blended membranes showed high flux and selectivity simultaneously, for 70-80wt% CS in the blend. The effect of feed flow-rate was studied to find the presence of concentration polarization for 90wt% EG in feed mixture as well. The crosslinked blend membrane with 75wt% CS showed a highest total flux of 0.46 kg/m2/h and highest selectivity of 663 when operating at 70oC with 90wt% EG in the feed mixture. Effects of crosslinking concentration and reaction time of trimesoyl chloride (TMC) were studied on poly(vinyl alcohol)-poly(sulfone) or PVA-PSf composite membranes. Results showed a consistent trend of changes in the physicochemical properties: the degree of crosslinking, crystallinity, surface roughness, hydrophilicity and swelling degree all decrease with increasing crosslinking agent (TMC) concentration and reaction time. The crosslinked membrane performance was assessed with PV dehydration of ethylene glycol-water mixtures at a range of concentrations (30 to 90wt% EG). The total flux of permeation was found to decrease, while the selectivity to increase, with increasing TMC concentration and reaction time. The decrease in flux was most prominent at low EG concentrations in the feed mixtures. A central composite rotatable design (CCRD) of response surface methodology was used to analyze PV dehydration performance of crosslinked poly(vinyl alcohol) (PVA) membranes. Regression models were developed for the flux and selectivity as a function of operating conditions such as, temperature, feed alcohol concentration, and flow-rate. Dehydration experiments were performed on two different alcohol-water systems: isopropanol-water (IPA-water) and ethanol-water (Et-water) mixtures around the azeotrope concentrations. Judged by the lack-of-fit criterion, the analysis of variance (ANOVA) showed the regression model to be adequate. The predicted flux and selectivity from the regression models were presented in 3-D surface plots over the whole ranges of operating variables. For both alcohol-water systems, quadratic effect of temperature and feed alcohol concentration showed significant (p < 0.0001) influence on the flux and selectivity. A strong interaction effect of temperature and concentration was observed on the selectivity for the Et-water system. For the dehydration of azeotropic IPA-water mixture (87.5wt% IPA), the optimized dehydration variables were found to be 50.5oC and 93.7 L/hr for temperature and flow-rate, respectively. On the other hand for azeotropic Et-water mixture (95.5wt% Et), the optimized temperature and flow-rate were found to be 57oC and 89.2 L/hr, respectively. Compared with experiments performed at optimized temperature and feed flow-rate, the predicted flux and selectivity of the azeotropic mixtures showed errors to be within 3-6 %.
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Części książek na temat "Rotatable design"

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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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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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"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 design"

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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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Cao, Junyi, Shengxi Zhou i Daniel J. Inman. "Nonlinear Characteristics for Rotatable Magnetically Coupling Piezoelectric Energy Harvesters". W ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-35505.

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This paper investigates the nonlinear dynamic characteristics of a magnetically coupled piezoelectric energy harvesters under low frequency excitation, where the angle of external magnetic field is adjustable. The nonlinear dynamic equation with the identified nonlinear magnetic force is derived to describe the electromechanical interaction of variable inclination angle harvesters. The effect of excitation amplitude and frequency on dynamic behavior is proposed by using the phase trajectory and bifurcation diagram. The numerical analysis shows that a rotatable magnetically coupling energy harvesting system exhibits rich nonlinear characteristics with the change of external magnet inclination angle. The nonlinear route to and from large amplitude high energy motion can be clearly observed. It is demonstrated numerically and experimentally that lumped parameters equations with an identified polynomials for magnetic force could adequately describe the characteristics of nonlinear energy harvester. The rotating magnetically coupled energy harvester possesses the usable frequency bandwidth over a wide range of low frequency excitation by adjusting the angular orientation.
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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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Ma, Tielin, Xiangsheng Wang, Zhihua Wei, Xue Zihan i Dawei Bie. "Conceptual Design of a VTOL Box-Wing UAV with Rotatable Duct-Fans". W AIAA Scitech 2019 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2019. http://dx.doi.org/10.2514/6.2019-2290.

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Myszka, David H., Andrew P. Murray i James P. Schmiedeler. "Using a Singularity Locus to Exhibit the Number of Geometric Inversions, Transitions and Circuits of a Linkage". W ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/detc2010-28188.

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The identification of motion characteristics and assembly circuits is fundamental in creating a workable mechanism. A circuit defect prevents a mechanism from moving between desired positions. This paper extends the established methods for analyzing multi-degree-of-freedom platforms to gain insight on single-actuated linkages. Specifically, from a plot of the singularity locus projected onto the input joint space, the number of singularities, number of geometric inversions and circuit regimes are revealed. The input/output motion of the linkage can be inferred from the locus. The methodology to produce the singularity locus is general and does not rely on geometric insights of a particular mechanism. By using the locus, desired operational features can be readily identified, such as a fully rotatable crank. Unique motion characteristics, such as a greater than 360° non-rotatable crank, can be also be detected. Further, it is observed that transition linkages serve as bounds between the regions of circuit change.
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