• Title, Summary, Keyword: Design Characteristic

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A Study on Flexible Pallet Design for Assembly Rationalization (조립합리화를 위한 유연성 있는 Pallet 설계에 관한 연구)

  • Mok, Hak-Soo;Lee, Jae-Man;Yang, Tae-Il
    • Journal of the Korean Society for Precision Engineering
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    • v.16 no.1
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    • pp.75-86
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    • 1999
  • In the assembly system, a pallet plays an important role of transfer and storage. As products become various, many different pallets are also necessary. Since some of them are redundant, a design of pallet with high flexibility is important. This paper suggests design alternatives, in designing pallets with high flexibility. The purpose of this study is to rationalize assembly process of mid-small size products. Every pallet has suitability values depending on characteristic factors of a product, and this value is determined by using AHP (Analytic Hierarchy Process) technique. As the characteristic factors of a product are changed, the suitability value is also changed. Design alternatives can be found by tracing change of the suitability value, which are based on correlation between the characteristic factors of a product and a pallet element.

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Vibration Analysis of Micro Speaker Diaphragm (마이크로 스피커 다이어프램의 진동해석)

  • Hong, D.K.;Woo, B.C.;Ahn, C.W.;Han, G.J.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.551-554
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    • 2005
  • This study uses a characteristic function to explain correlations between the objective function and design variables. Analysis of means and table of orthogonal array were carried out. The change of shape of diaphragm, thickness of diaphragm and voice coil weight based on the table of orthogonal array is made. Therefore this study carried to decide shape of diaphragm, voice coil weight and thickness of diaphragm for minimizing 1st natural frequency and maximizing 2nd natural frequency of diaphragm using design of experiments and characteristic function with constraints. we showed improved design factors that minimized 1st natural frequency and maximized 2nd natural frequency of diaphragm.

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Design of Optimized Interval Type-2 Fuzzy Controller and Its Application (최적 Interval Type-2 퍼지 제어기 설계 및 응용)

  • Jang, Han-Jong;Oh, Sung-Kwun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.8
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    • pp.1624-1632
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    • 2009
  • In this study, we introduce the design methodology of an optimized Interval Type-2 fuzzy controller. The fixed MF design of type-1 based FLC leads to the difficulty of rule-based control design for representing the linguistically uncertain expression. In the Type-2 FLC as the expanded type of Type-1 FLC, we can effectively improve the control characteristic by using the footprint of uncertainty(FOU) of membership function. Type-2 FLC has a robust characteristic in the unknown system with unspecific noise when compared with Type-1 FLC. Through computer simulation as well as practical experiment, we compare their performance by applying both the optimized Type-1 and Type-2 fuzzy cascade controllers to ball and beam system. To evaluate each controller performance, we consider controller characteristic parameters such as maximum overshoot, delay time, rise time, settling time and steady-state error.

Evaluation of Railway Trends by Railway Characteristic Factors (철도차량 특징요인에 의한 철도차량 트렌드 평가)

  • Lee, Hee-Yup;Kim, Chang-Hyun
    • Journal of the Korean Society for Railway
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    • v.9 no.6
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    • pp.705-710
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    • 2006
  • The railway has been developed largely by the characteristic factors of the railway through change of the society and culture. The railway trends has been changing from instinctive methods to settle the mass transport of the early days, to sensitive methods to pursue the railway culture centering around human being. As dividing by period according to the changes of railway trends into the external nation, there are to analyze the development history of the railway design. Accordingly each nation (United Kingdom, Germany, France, Japan) and the style's change, to confirm the changes into the design applied in society and culture needs, and to analyze by a year in changes of the environment and the railway history from the 1800's to 2005, so there contribute in the development of railway design to present the paradigm of the future railway by analyzing the trend according to the changes of railway design and the life environment in this paper.

Robust Optimization Design of Overhead Crane with Constraint using the Characteristic Functions (특성함수를 이용한 제한조건이 있는 천장크레인의 강건최적설계)

  • 홍도관;최석창;안찬우
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.2
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    • pp.160-167
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    • 2004
  • The correlation between the object function and the design parameter is shown on this paper by using the characteristic function for the mixed result of the structural analysis, the buckling analysis and the table of orthogonal array according to the original overhead crane's dimensional change. About the above two functions, the effectiveness of design change according to the change of design parameters could be estimated. Also, the overhead crane's weight is reduced up to 10.55 percent maintaining the structural stability according to the thickness of plate.

A Study on the Characteristics of Indeterminate Program based on the Philosophical Concept of Relationship in Post Structuralism (후기구조주의적 사유체계로서의 관계성에 기초한 현대건축공간의 비결정적 프로그램의 특성에 관한 연구)

  • Kim Yun-Jung;Park Chan-I1
    • Korean Institute of Interior Design Journal
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    • v.14 no.6
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    • pp.37-46
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    • 2005
  • This study is focused on the indeterminacy of the contemporary social structure based on the philosophical concept of relationship. The purpose of this study is to present the index of the space planning that the contemporary society demands through analysis of a characteristics of the indeterminate program. As the result, we got a characteristic and a design method of the following indeterminate programs. (1)The characteristic of the interior space programs are in such cases as combined, the continuance, the pile, the juxtaposition, mixing and interference etc. (2) The characteristics of space planning are multiple changes of the space occupation, various sight experiences, folding structure, expansion of flow space, the insertion of a between spates etc. (3) The characteristic of space design expression is addition of various functions tv unification of a structural element and an element of furniture.

A Study on AFPM(Axial Flux Permanent Magnet)Motor without Stator Corer (코어없는 축방향 영구자석형 전동기에 관한 연구)

  • Park, Jong-Chan;Choi, Hae-Ryong;Choe, Gyu-Ha
    • The Transactions of the Korean Institute of Power Electronics
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    • v.11 no.3
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    • pp.284-291
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    • 2006
  • Recently with the motorizing of electric home appliances and car systems, there is increasing interest in high efficiency electric motors. Thus, the present study described the operating characteristics of coreless AFPM motor that is highly efficient in high speed driving, and discussed its electric characteristics from the perspective of design. In particular, we examined back electromotive force and the magnetic field characteristic in slits, which have significant effects on the characteristic of the motor, and conducted simulation and experiment on control characteristic according to inductance characteristic. This study analyzed torque speed and efficient operation characteristic as well as control characteristic through comparing the result of motor design with the result of output characteristic experiment based on the electric network method. Furthermore, we evaluated vibration and noise that may occur due to the absence of core.

A Study on the Preference Design and the Demand Performance for Adult Men's Suit (성인 남성의 신사복에 대한 선호 디자인 및 요구 성능)

  • Park, Young-Hee;Han, Seung-Hee
    • The Research Journal of the Costume Culture
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    • v.18 no.1
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    • pp.1-12
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    • 2010
  • This study diagnosed difference of preference about demand performance with design of men's suit according to demographic characteristic and figured out Needs of adult man consumers for men's suit. This study is survey research. In order to collect data, a questionnaire was used. To analyze the collected data, fact analysis, $\chi^2$, ANOVA, Duncan's multiple comparisons and the rest were carried out with using SPSS 14.0. Result of this study could get as following. According to silhouette and color, there was difference to age, attainments in scholarship and preference according to job. Also young people preferred fitted-silhouette and in occasion of color, all of them preferred best black. It was no difference according to demographic characteristic in preferring pattern but preferred best solid on the whole. Demand performance of men's suit appeared by five main causes of design, practicality, comfort, appearance appropriateness, another person awareness and functional materials. And most main causes showed difference according to demographic characteristic.

A Study on Design Characteristics of Domestic Furniture for Residence (국내 주거용 가구디자인 특성에 관한 연구)

  • Kim, Kook-Sun;Park, Sung-Won
    • Journal of the Korea Furniture Society
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    • v.16 no.2
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    • pp.49-57
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    • 2005
  • This study purposed to grasp the Design Characteristic of the representative Furnitures produced recently by Domestic Furniture Manufacturers. As for the researching method, setting as the object of the selected 7 furniture manufacturers, through the regional classification such as living room, bedroom, dining room, and then chose again the 395 items of furnitures to be analyzed. The Design Characteristic of the chosen furnitures has been examined clearly by the analysis standard framework for those peculiarities at view of aesthetic, decorating and material. As the result of analysis, as for the aesthetic Peculiarity of the furnitures, the rectilinear form was overwhelming than the curve lined shape, and it was appeared that the brighter tone of color was used quite more. In the respect of aesthetic characteristic, the furnitures decorated with modern style is pretty gaining predominance than that of reflected style of traditional character, and since modern residential space has been maintained continuously as minimal shaped trend for several years, it could be known that such moulding and decorating peculiarities and also furniture as the composing factor of space had been selected together with it. Based on such conclusion, standing on this time point where the design trend of residential space is being changed, it is also considered that the Development of Furniture Design which copes positively with such change tendency in the future.

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