• Title, Summary, Keyword: Design and manufactures

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Design and Manufactures of Cyclocopter Composite Wing Blades (사이클로콥터의 복합재료 Wing blade 설계 및 제작)

  • 김승조;윤철용;백병주
    • Proceedings of the Korean Society For Composite Materials Conference
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    • pp.187-190
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    • 2000
  • Cyclocopter is air vehicle to vertically take-off and land like a helicopter. This is an efficient and quiet means of being able to direct thrust compared to a helicopter. The rotor consists of several blades rotating about a horizontal axis perpendicular to the direction of normal flight. The direction of blade span is parallel to rotating axis and both end roots are connected to the hub to resist centrifugal force and to transmit the power. The pitch of the individual blades to the tangent of the circle of the blade's path is varied cyclically to gain thrust. In the paper, the design and manufactures of cyclocopter rotor blades are presented. Stress at the roots of cyclocopter blades is great due to centrifugal and aerodynamic forces and aeroelastic instabilities appear. The blades consist of main spar, front spar, polyurethan foam, weight, and skin and spars and skin are made of glass/epoxy composite.

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Affective Evaluation of Interior Design of Commercial Cars using 3D Images

  • Park, Kunwoo;Park, Jaekyu;Kim, Sungmin;Choe, Jaeho;Jung, Eui S.
    • Journal of the Ergonomics Society of Korea
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    • v.33 no.6
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    • pp.515-532
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    • 2014
  • Objective: The purpose of this study is to define consumers' affection on the interior design of commercial cars in terms of its design factors: color, embossing and gloss as independent factors. Background: Existing affective studies related to interior of vehicle focus on just sedans. However, there is no affective study about the interior of commercial cars. In addition, it is hard to change levels to which manufactures want. Method: Representative design factors were drawn using ANOVA and SNK analysis and definitive affective vocabularies were drawn using factor analysis. Furthermore, the results of 3D experiment were analyzed using ANOVA and LSD analysis. 3D images for the experiment were made using 3D max program. The experiment revealed that consumers discerned the differences in levels of each design factor and affective vocabulary. Results: The ANOVA revealed that beige color "A" type and non-gloss were the most preferred design in terms of the affective vocabularies and total preference. Conclusion: The result of the experiment may help manufactures to design the interior of commercial cars in the near future. Furthermore, the ANOVA result of affective vocabularies evaluation is expected to suggest a meaningful guideline. Application: The study results may be utilized as a guideline for interior design of commercial cars.

Design of IEC 61850 Logical Nodes for Modeling Protective Elements of Selective-Breaking Integrated Protective Relay for DC Traction Power Supply System (DC 급전계통 선택차단형 통합보호계전기 보호요소 IEC 61850 Logical Node 설계)

  • Yun, Jun-Seok;Kim, In-Woong;Kim, Jin-Ho;An, Tae-Pung;Jung, Ho-Sung;Jung, Tae-Young
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.61 no.3
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    • pp.491-496
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    • 2012
  • There are several protective relays used to protect DC traction power supply system for DC railway. These relays, however, are made by different manufactures and they have different ways for their operations. Therefore, there are difficulties for cooperation between the devices or the devices and an upper system. In order to increase interoperability and stability of the system composed of devices made by different manufactures, IEC 61850 international standards are applied to design logical nodes for modeling protective elements used in protective relays.

Estimation of Process Parameters Using QFD and Neural Networks in Injection Molding (품질기능전개와 신경망 회로를 이용한 사출성형 공정변수의 예측)

  • Koh, Bum-Wok;Kim, Jong-Seong;Choi, Hoo-Gon
    • IE interfaces
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    • v.21 no.2
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    • pp.221-228
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    • 2008
  • The injection molding process is able to produce high precision manufactures as a single process with fast speed. However, the prices of both the mold and the molding machine are expensive, and the single process is very complex and difficult to compose of the exact relationship between the process setting conditions and the product quality. Therefore, the quality of a molded product often depends on a skillful engineer's operations in the design of both parts and molds. In this paper, the relationship between the process conditions and the defectiveness is built for better manufactures under settings of the appropriate parameters, and so it can reduce the setup time in the injection molding process. Quality Function Deployment (QFD) provides severe defectiveness factors along with the related process parameters. Also, neural networks estimate the relationship between defective factors and process setting parameters, and lead to reduce the defectiveness of molded parts.

A Study on Office Desk System Considering Variability (가변성을 고려한 사무용 데스크 시스템 개발)

  • Shin, Eungsun
    • Journal of the Korea Furniture Society
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    • v.23 no.4
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    • pp.395-406
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    • 2012
  • This study aims at the development of office desk system considering variability to realize various typed desks. The opened and variable workstation for good communications and team work between team members has maintained since 2000. Recently, owing to the growth of knowledge industry and the promotion of office environment, the differentiated workstations are being organized by the type of business. Such a trend reflects that users are requiring a variety of office desks. Therefore, this study focuses on systematic variability to solve a variety of workstations required for office space. The object of this study also includes the basic typed-desks and the other desks realized from variable work. This study also aims at the practical variability to feel all the users and manufactures by realizing 6 kinds of desks with the smallest parts. Consequently, it verifies that the systematization can get a designed unity, it is easy for users or manufactures to assemble and disassemble the systematized desks in office space, where the users can often change the workstation with their compatible parts. It is also thought interior designers should carry out a variety of studies on system workstaion, based on the advanced variability.

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Ergonmic Design of Vending Machine (자판기의 인간공학적 설계)

  • 권영국
    • Journal of the Society of Korea Industrial and Systems Engineering
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    • v.24 no.62
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    • pp.69-77
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    • 2001
  • A current design trend of a vending machine is pursuing easy manufacturing and large capacity of holding cans. Therefore this study aims to ergonomically redesign vending machine and to analyze the motion of awkward posture to take out cans. Using Vision 3000 system, after investigating which motion can affect users, a new ergonomically designed vending machine, which was based on anthropometric data and guideline for control panel and exit of cans. New design shows a significantly improved usability and less stress. With new ergonomically designed vending machine at figure 3 can give a benefit for both users and manufactures.

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EFFECT OF DESIGN PARAMITERS ON SEASONAL PERFORMANCE OF AN A/C SYSTEM (공기조화기의 설계인자가 계절성능에 미치는 영향)

  • Park, Y.C.
    • 한국전산유체공학회:학술대회논문집
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    • pp.239-241
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    • 2010
  • Performance evaluation for an air conditioning system is conducted at a specified test conditions. One is low temperature and the other is high temperature condition. Most of the manufactures tried to improve the performance at higher outdoor temperature. One of the reasons is that the customer wants to get ore capacity at high temperature climate. To cope with these kinds of demand, manufactures are tried to achieve higher capacity at high temperature with minimum power consumption even with same size of the system. Consequently, previous studies on performance of the air conditioning system are focused on capacity and performance improvement at high outdoor temperature.

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The Operation of Domestic Women's Apparel Fashion Designer - Focusing on Brand type and Fashion Merchandising Process -

  • Lee, Eun-A;Kwon, Hae-Sook
    • Journal of Fashion Business
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    • v.10 no.3
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    • pp.87-99
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    • 2006
  • For comprehending the duties of fashion designer, Sharon(1989) has suggested to look at the procedure how the goods are being produced. The purpose of this research is to identify the task of domestic fashion designer by comparing and analyzing one's work range and performing level in the fashion merchandising process according to the brand types which one is involved in. The preliminary research for the questionnaire was conducted with 5 chief designers of woman's apparel manufactures in Seoul. They were asked to judge if designer's tasks fit to their carry-out operations in the pre-fixed questionnaire which had been done based on preliminary researches and literatures related with fashion merchandising process. The contents of research questionnaire are 11 questions to understand the general characteristics of companies and the participated subjects, and 42 questions to understand the designers' operations. For the selection of NB, among 503 domestic female apparel brands that were in 'Korean Textile Fashion yearbook (2002-2003), the companies that were located in Seoul and possible for cooperation by researcher's personal relationship were selected. For DB, cooperation was requested for brands that were located in Seoul among the 137 brands that participates on Domestic Collection. For GB, 50 stores were selected at random or by personal relationship among 32 GB shops such as Freya Town, Doosan Tower, New Zone, and so on. Total 300 questionnaire distributed to the designers, 192 copies were used for final data analysis. For data analysis, descriptive statistics and ANOVA, Sceffe test were used using SPSS V. 11 1. The participated fashion designers operated 41 categories of suggested 42 categories in the fashion merchandising process. 2. The ranges and contents of tasks in the fashion merchandising process that fashion designers mainly carry-out are very different according to the brand types and showed much different level of task carry-out. Only in the categories of 'fashion trend information' and 'design ideation', all three brand type showed the highest level of task performance. And the design related tasks presented common higher level of performance than the other tasks in all brand types. In order to comprehend the operation of fashion designer, various approaching methods are required according to various apparel manufactures' characteristics.

The comparison of emotional brand image of the domestic mobile phones (국내 휴대폰 브랜드의 감성 이미지 비교)

  • Jeong, Sang-Hoon
    • Science of Emotion and Sensibility
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    • v.13 no.3
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    • pp.493-500
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    • 2010
  • The development of new technology and diversity in user needs lead mobile phone manufacturers to establish new strategies different from the existing for user attraction. Product identity, and brand image are major strategies for differentiation and adding new values to a product. This research starts with stating emotional brand image as the brand image made by the actual usage and the emotion built from the experience while using the product. This research will compare emotional brand image of the three major mobile phone manufactures in Korea (Brand A, C, and S) using evaluation of six representative emotions from users while using the product. The result of evaluating actual mobile phone users and the emotion built while actually using the product showed the brand image, and especially the emotional side of Korean mobile phone manufacturers. The result of this research itself would not be sufficient to simply state the emotional brand image of Korean mobile phone manufactures, but with further research including age, profession, gender and other demographic factors the result of this research would surely be able to abstract a clearer view of emotional brand image of Korean mobile phone manufactures.

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A Study on Gear S/W Development Based on AGMA Specifications (AGMA 규격에 의한 기어 해석용 S/W 개발에 관한 연구)

  • Shin J.H.;Kwon S.M.;Hwang J.G.;Kim J.C.;Kim C.H.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.391-392
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    • 2006
  • Gears are essential and useful elements which power is transmitted from a source to a driven equipment. Therefore, it is very important to design gears correctly. Two important points in the gear design procedures are capacities of the gears's bending strength and pitting resistance. This paper deals with two subjects about spur and helical gears : analyzing for strength and wear capacities, and design of face width. Also, this paper proposes the analytical program which is developed for computer aided design and analysis This program is based on the American Gear Manufactures Association(AGMA) Standards.

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