• Title, Summary, Keyword: Design Characteristic

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Design and Characteristic Analysis of Vaccum Pump Using Moving Magnet type Linear Oscillatory Actuator (가동 영구자석형 리니어 진동 액츄에이터를 이용한 진공 펌프의 설계 및 특성해석)

  • Cho, Sung-Ho;Lee, Dong-Yup;Kim, Duk-Hyun;Lee, Ho-Kil;Kim, Gyu-Tak
    • Proceedings of the KIEE Conference
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    • pp.811-813
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    • 2002
  • This paper deals with the design of vaccum pump using moving magnet type linear oscillaory actuator based on the design procedure and the characteristic analysis. To improve the starting characteristic, the optimum spring constant is detected and redesigned. The parameter was calculated by Finite Element Method(FEM). In order to dynamic characteristic analysis, Time difference method with voltage and kinetic equation is used. The propritey of the improved model is verified through the experimental.

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A Study on the Relationship between Architecture and polyphony music - Focusing on Proportional Characteristic of Space - (건축과 다성음악의 상관성에 관한 연구 - 공간의 비례적 특성을 중심으로 -)

  • IRhim, Sung-Sup;Lee, Ho-Joung
    • Proceedings of the Korean Institute of Interior Design Conference
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    • pp.122-127
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    • 2004
  • This study is about a relationship of architecture and polyphony music. 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.

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An Analysis on the characteristic of recognition about Individual Housing according to the landscape in Donghae Seaside (동해연안 주택외관의 인지특성에 관한 연구)

  • Cho, Won-Seok;Kim, Heung-Ki;Kim, Yong-Ki;Joo, Jae-Woo;Kim, Jung-Hyun
    • Journal of the Korean Institute of Rural Architecture
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    • v.7 no.3
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    • pp.27-35
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    • 2005
  • This study is about finding out characteristic of recognition individual housing in seaside of Donghae. To accomplish this purpose, we survey the 150 houses related to the landscape. Thus the major analysis is to take basic data, such as image(modern, western, traditional, etc) about exterior form of housing corresponding to the landscape. The result summarized as follows First, the elements for the characteristic of recognition were exterior material finish, exterior color, roof type, roof material finish, window size, roof slope, area of wall vs roof. Second, the image of traditional housing was very insufficient to plan landscape of housing with design elements. This research suggests that landscape housing of future is to be environmental landscape design and the proper design is to be various considering not only user's preference but also control of landscape.

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Characteristic Analysis & Optimum Design of Permanent Magnet Assisted Synchronous Reluctance Motor for Premium Efficiency Performance (효율 향상을 위한 영구자석 매입형 동기 릴럭턴스 전동기의 특성해석과 최적설계)

  • Mun, Sung-Ju;Lee, Tae-Hoon;Lee, Jung-Ho
    • Proceedings of the KIEE Conference
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    • pp.716_717
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    • 2009
  • This paper deals with the characteristic analysis & optimum design of Permanent Magnet Assisted Synchronous Reluctance Motor(PMASynRM) for Premium Efficiency Performance. The focus of this paper is characteristic analysis of d and q-axis inductances and torque according to magnetizing quantity of interior permanent magnet for PMASynRM. The d and q-axis current component ratios, load angles of a PMASynRM are investigated quantitatively on the basis of the proposed analysis method and the experimental test. Comparisons are given with output characteristic curves of normal SynRM and those according to the load in PMASynRM, respectively. And optimum design of PMASynRM is performed by Response Surface Methodology(RSM).

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The study on the WiBro digital optic repeater design (휴대인터넷 디지털 광 중계기 설계에 대한 연구)

  • Ahn Jun-Bae;Ryoo Kyoo-Tae
    • 한국정보통신설비학회:학술대회논문집
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    • pp.35-38
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    • 2006
  • Using the repeaters is indispensable to WiBro services. Repeater types are distinguished by usage, output power and required performance. In the paper, we have studied on the WiBro digital optic repeater design which has excellent performance characteristic than any other repeaters. WiBro has specific characteristic on modulation method TDD(Time Division Duplex)/OFDMA(Orthogonal Frequency Division Multiple Access) so that it demands specified H/W to design WiBro repeater. Switching technique has been introduced because of TDD characteristic in each amplifier on the repeater. Time Advance technique has been considered because of OFDM characteristic among RAS(Radio Access Station) and repeater. In this paper, we have studied on these techniques to increase repeater cell coverage and distance between RAS and repeater.

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Design and Characteristic Analysis of LSM for High Speed Train System using Magnetic Equivalent Circuit

  • Ham, Sang-Hwan;Cho, Su-Yeon;Kang, Dong-Woo;Lee, Hyung-Woo;Chan, Hong-Soon;Lee, Ju
    • International Journal of Railway
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    • v.3 no.1
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    • pp.14-18
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    • 2010
  • This paper describes design and characteristic analysis of long primary type linear synchronous motor (LSM) for high speed train system. LSM is designed using loading distribution method and magnetic equivalent circuit. For characteristic analysis of LSM, analytical and numerical methods are applied. Analytical method for solving the magnetic field distribution of the analytic model is based on the Maxwell’s equations. Using the characteristic equation and magnetic equivalent circuit, we analyze the effect of variation of parameters, and then we validate the result by comparing with numerical method by finite element method (FEM). We compare the analytical method with numerical method for analyzing the effect by variable parameters. This result will be useful of design and forecast of performance without FEM.

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A Study on the Parameter Design of Multiple Characteristics Considering Characteristical Importance (특성치 중요도를 고려한 다중특성치 파라미터 설계에 관한 연구)

  • 김용범;조용욱;김우열
    • Journal of the military operations research society of Korea
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    • v.25 no.2
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    • pp.62-72
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    • 1999
  • Taguchi´s parameter design is to determine the optimal settings of design parameters of a product or a process such that the characteristics of a product exhibit small variabilities around their targer values. His analysis of the problem has focused only on a single characteristic or response. However 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 conflict among the selected levels of the design parameters for each individual characteristic. In this paper, Methodology using SN ratio optimized by unvariate technique is proposed and a parameter design procedure to achieve the optimal compromise among several different response variables is developed. One existing case study is solved by the proposed method and the results are compared with ones by the sum of SN ratios, the expected weighted loss, the desirability functions, and EXTOPSIS model.

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Statistical Representation Methods of Ground Data (지반조사 데이터의 통계처리기법)

  • Lee, Kyu-Hwan;Yoon, Gil-Lim
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.85-110
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    • 2008
  • Ground investigation data to be used as a basis for geotechnical analysis and foundation design are usually troubled with large uncertainty, due to natural variability and limited number of data. Statistical methods can be a rational tool for handling such uncertain ground data, in particular with a view to the selection of characteristic values for estimating ground design parameters used in design. The characteristic values of soil properties for use in geotechnical design have oftenly based on not only a subjective judgment but also engineer's past acumulated experience. This paper discussed some statistical methods which can handle such intrinsic ground uncertainty data with a case design in a rational manner.

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Robust Optimization Design of Overhead Crane with Constraint Using the Characteristic Functions

  • Hong, Do-Kwan;Choi, Seok-Chang;Ahn, Chan-Woo
    • International Journal of Precision Engineering and Manufacturing
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    • v.7 no.2
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    • pp.12-17
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    • 2006
  • This study uses a characteristic function to explain correlations between the objective function and design variables. For the use, structural analysis and buckling analysis are carried out. the dimensional change of an original overhead crane is made based on the table of orthogonal array. For two functions or more, the effectiveness of design change can be evaluated in accordance with change in design parameters. Also, the overhead crane's weight is reduced by up to 10.55 percent while its structural stability maintained.

A Study on the Shape Design of Micro Speaker Diaphragm (마이크로 스피커 다이아프램의 형상설계에 관한 연구)

  • Hong, Do-Kwa;Woo, Byung-Chul;Kim, Dong-Young;Ahn, Chan-Woo
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.15 no.7
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    • pp.775-780
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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 design variables 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 variables.