• Title, Summary, Keyword: Design Characteristic

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Cost Reduction Design in Single-phase Line-start Permanent Magnet Motor (단상 유도형 동기 전동기의 Cost 저감 설계)

  • Lee, Byeong-Hwa;Nam, Hyuk;Lee, Jeong-Jong;Fang, Liang;Hong, Jung-Pyo;Ha, Seung-Hyung
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.12
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    • pp.2208-2212
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    • 2008
  • This paper deals with the cost reduction design of a single-phase line-start permanent magnet(LSPM) motor. Due to high cost of the permanent magnet(PM), cost reduction can be effectively achieved by reducing PM volume. Therefore, motor characteristics according to the PM volume are calculated by using d-q axis equivalent circuit analysis, and the characteristic map is made. In the characteristic map, maximum torque and efficiency are shown according to motor parameters such as back electromotive force(back emf) and inductances; back emf represents the PM volume. Minimum back emf and inductances satisfying output performance are determined in the characteristic map. Then, motor geometry based on the prototype motor is optimized to get the determined parameters using response surface methodology(RSM) and finite element method(FEM). Through the presented cost reduction design, total PM volume is reduced to 32% of prototype model.

A Study on the Optimization of a Devided Ball Valve using Characteristic Function (특성함수를 이용한 분할 볼 밸브의 최적설계에 관한 연구)

  • Choi, Jong-Sub;Park, Young-Chul
    • Journal of the Korean Society for Precision Engineering
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    • v.22 no.8
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    • pp.108-117
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    • 2005
  • In modern industrial society, many kinds of valves have been used to control fluid flow. For the optimization of a ball valve, a quarter of spherical ball was modeled and evaluated. However, there is a difficulty in the application of the optimization technique because of the complexity of the fluid and the restriction of analysis. Therefore, in this study, it is performed to evaluate the stability of an initial model using FEM(Finite Element Method) and CFD. In addition, a shape optimization design of the valve is accomplished using an orthogonal arrangement and characteristic functions. From the result, a new design method is represented that could overcome the time and space restriction in structural design, such as the divided ball valve with less experiment.

A Study on the Polyphony Music Proportion which Appears Today in the Architecture Space (현대 건축 공간에 나타난 다성음악적 비례에 관한 연구)

  • Rhim Sung-Sup;Lee Ho-Joung
    • Korean Institute of Interior Design Journal
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    • v.14 no.2
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    • pp.46-54
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    • 2005
  • This study is about the polyphony music proportion which appears today in the Architecture space. In the field of interior architecture, there have been many tries of applying characteristics of music, such as abstraction and nature of time for users of space to have new experience. It has been possible because architecture and music have similarities in many ways. Regarding using proportional characteristic in architecture and music, the both fields are enormously related in some ways. The purpose of this study is explaining of possibility of architectural expression in music and suggesting a way of analysing architectural design based on musical elements emphasizing proportional characteristic. Therefore, it is going to analyse Counterpoint of Bach, which is well expressed in music and compare it with proportional characteristic of space through this study.

An Empirical Analysis of a Process Design Considering Worker's Cognition (작업자의 인지를 고려한 공정 설계에 대한 실증 연구)

  • Kim, Yearnmin
    • Journal of Korean Institute of Industrial Engineers
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    • v.42 no.2
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    • pp.80-85
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    • 2016
  • This study suggests a process design using cognitive processes. Job characteristic model for job design and recent cognitive engineering studies for process design are reviewed briefly. By using these concepts, the lean production system is re-interpreted in terms of cognitive engineering and the latent dimensions of the lean production system are revealed as the application of cognitive engineering principles. An integrated process design framework for cognitive manufacturing system using job characteristic model is suggested for the effective design of manufacturing system. Propositions for empirical analysis of this model are also analyzed through a questionnaire survey. Propositions are (1) experiential cognition and motivation potential affect the ability, role perception, and need for achievement of the operator in the manufacturing system, (2) the ability, role perception, and need for achievement of the operator affect the job performance. Both propositions are supported by correlation analysis and path analysis.

A Study on the Characteristic and Composition Factor of Contemporary Japanese Costume Design (현대 패션의 일본적 디자인 특성과 이미지 구성요인)

  • Kim, Hee-Jung
    • Fashion & Textile Research Journal
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    • v.4 no.1
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    • pp.11-18
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    • 2002
  • The purpose of this study was to investigate the characteristic and composition factor of Japanese costume design. The stimulus were 25 contemporary costume design which represented the traditional image of Japanese. The main survey of questionary consisted of their evaluation of the Japanese costume image by 26 semantic differential bipolar scales and the subjects were 99 female students majoring in clothing and textiles. The data were analyzed by Factor analysis, Multidimensional Scaling Method and Regression Analysis. The major findings were as follows. As a result of design analysis, contemporary Japanese costume design which represented the traditional image had traditional form, color, texture, pattern, etc. Through factor analysis about Japanese costume image 7 factors were identified; Attractiveness, Attention, Cool and warm, Neatness, Activeness, Maturity, Classics. According to image positioning, Japanese costume design was classified by simple-decorative, soft-hard. As the result of regression analysis, The preference of Japanese costume image was related to attractive factor.

The Preference Factor and Satisfaction of General Internet Shopping Mall and Feminine Internet Fashion Shopping Mall (인터넷 일반쇼핑몰과 여성의류쇼핑몰의 선호요인과 만족도)

  • Kang, Min-jeong;Kim, Mi-Young
    • Journal of the Korea Fashion and Costume Design Association
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    • v.12 no.4
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    • pp.1-13
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    • 2010
  • The purpose of this study is to examine the different preference as well as the factor for this preference between general internet shopping mall and feminine internet fashion shopping mall only which are subjected with women and know the satisfaction which follows hereupon. This research will help to establish the strategy to marketers who manage feminine internet fashion shopping mall. The results of this study as follows; 1. As the result of the analysis of preference factors for general internet shopping mall, it was classified with, convenient characteristic, economical efficiency, product and information characteristic, sales promotion, and customer service. Also differences among preference factors appear with following orders, economical efficiency, convenient characteristic, product and information characteristic, sales promotion, and customer service. 2. As the result of the analysis of preference factor for feminine internet fashion shopping mall, it was classified with, fashion information and style, purchase product, economical efficiency, product assortment, and customer service. Also differences among preference factors appear with following orders, fashion information style, product assortment, purchase product, economical efficiency, and customer service. 3. As the result of the analysis of preference factors, convenient characteristic and product information mostly effects to satisfy the customers who use general internet shopping mall. Also purchase product, product assortment, fashion information and style mostly effects to satisfy the customers who use feminine internet fashion shopping mall.

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RELATIONSHIPS AMONG CHARACTERISTIC FINITE ELEMENT METHODS FOR ADVECTION-DIFFUSION PROBLEMS

  • CHEN, ZHANGXIN
    • Journal of the Korean Society for Industrial and Applied Mathematics
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    • v.6 no.1
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    • pp.1-15
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    • 2002
  • Advection-dominated transport problems possess difficulties in the design of numerical methods for solving them. Because of the hyperbolic nature of advective transport, many characteristic numerical methods have been developed such as the classical characteristic method, the Eulerian-Lagrangian method, the transport diffusion method, the modified method of characteristics, the operator splitting method, the Eulerian-Lagrangian localized adjoint method, the characteristic mixed method, and the Eulerian-Lagrangian mixed discontinuous method. In this paper relationships among these characteristic methods are examined. In particular, we show that these sometimes diverse methods can be given a unified formulation. This paper focuses on characteristic finite element methods. Similar examination can be presented for characteristic finite difference methods.

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Characteristic Analysis and Dating Guidance of European High Heeled Shoes Design in the 18th Century (18세기 하이힐 디자인의 특성 및 연대추정에 관한 연구)

  • Kim, Sun-Ah
    • Fashion & Textile Research Journal
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    • v.10 no.2
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    • pp.128-137
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    • 2008
  • The purpose of this study is to investigate the characteristic analysis and to date guidance of European high heeled shoes in 18th century. The research was conducted by stylistic analysis of high heeled shoes from literature review and museums resource. 14 comparative study on shoe objects dating from 1600-1790 in the Museum at F.I.T., New York, Museum of Art, Boston and Metropolitan Museum of Art, New York were selected. The result of this study are as follows: (1) The origin and development of high heeled shoes were accomplished by protection, social status and exaggeration of body, decoration and fashion. (2) According to the comparative study of Museum objects and literature, characteristic analysis of high heeled shoes from 1700-20s, 1730-40s, 1750-60s, 1770-89 and 1890-1900 were accomplished. (3) Significant elements of European women's shoes from 18th century that aid dating are identified as the presence of white rand, shape of tongue, heel shape and height, latchat, toe shape, color and materials.

A Study on the Present Condition and the plasticity of Practical Korean Costume (생활한복 현황 및 디자인의 조형성에 관한 연구)

  • 안현숙
    • Journal of the Korea Fashion and Costume Design Association
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    • v.4 no.2
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    • pp.85-102
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    • 2002
  • This research surveys the forming process of Practical Korean Costume and its social factors and examines Hanbok reformation. The international mode of '86 Seoul Asian Games and '88 Seoul Olympic Games in the 1980's called for the modernization of Hanbok. It is necessary for us to inherit modernized Hanbok which is endowed with the traditional beauty. The purpose of this research is to develop Practical Korean Costume design for focused on functionality as well as on keeping the traditional beauty This study consist of theoretical study and positive study. Theoretical study has the esthetic characteristics(structure characteristic, formative characteristic and the characteristic of color). Grounded upon survey on brands, I have suggested designs that maintain Hanbok's superiority and functionality to fit modern life. Most of Practical Korean Costume shops could not fractionalize customer. So it need to subdivide and specialize customer and investment to improvement of design. Practical Korean Costume will have to be made to maintain dignity by using high quality materials and a coordinate goods will have to be developed.

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The Parameter Design of Multiple Characteristics Using EXTOPSIS Model (EXTOPSIS 모형을 이용한 다중특성치의 파라미터설계)

  • Bae, Young-Ju;Kim, Kawng-Soo;Lee, Jin-Gue
    • Journal of the Korean Society for Quality Management
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    • v.24 no.3
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    • pp.111-132
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    • 1996
  • Taguchi's parameter design is to determine optimal settings of design parameters of a product or a process such that the characteristics of a product exhibit small variabilities around their target values. His analysis of the problem has focused only on a single characteristic or response, but the quality of most products is seldom defined by a characteristic, and is rather the composite of a great number of characteristics which are often interrelated and nearly always measured in a variety of units. The critical problem in dealing with multiple characteristics is how to compromise the conflicts among the selected levels of the design parameters for each individual characteristic. In this paper, the EXTOPSIS Model using SN ratio which can be optimized by univariate technique is proposed and a parameter design procedure to achieve the optimal compromise among several different response variables is developed. Two existing case studies are solved by the proposed method and the results are compared with ones by the sum of SN ratios, the expected weighted loss, and the desirability function.

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