• Title, Summary, Keyword: 다구치방법

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A Study on the Friction Characteristics of Automotive Composites Brake Pads Using Taguchi Method (다구치 방법을 이용한 복합재료 자동차용 마찰재의 마찰특성에 관한 연구)

  • 이정주;김윤해
    • Proceedings of the Korean Society For Composite Materials Conference
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    • pp.141-146
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    • 2000
  • It has many variables and factors to design the friction materials for automotive brake pads. In this study, the friction and wear characteristics of automotive blake pads have been studied using 1:l full size dynamo meter. Using conventional manners, it takes a great of time and efforts to know that it affects the each raw materials for friction characteristics. For the purpose of examining the effect of each major raw materials, we used the more convenient Taguchi L9 ($3^4$) orthogonal matrix and 1/5 scale dynamo machine for evaluation of the friction characteristics of composite brake pads.

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A Study on the Friction Characteristics of Automotive Composites Brake Pads Using Taguchi Method (다구치 방법을 이용한 복합재료 자동차용 마찰재의 마찰특성에 관한 연구)

  • Kim, Yun-Hae;Lee, Jeong-Ju
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.26 no.4
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    • pp.660-666
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    • 2002
  • It has many variables and factors to design the friction materials for automotive brake pads. The purpose of this study is to develop the proper method for design of low-cost and to know friction characteristics of each raw materials. For the purpose of examining the effect of each major raw materials, we used the Taguchi L9(3$^4$)orthogonal matrix and 1/5 scale dynamo machine for evaluation of the friction characteristics of composite brake pads. By adapting the Taguchi method, it is easy to investigate the influence of each component in complicated composites friction materials. After analyzing the testing results by the Taguchi method, the effect of factors and levels influenced friction behavior was studied.

Design for LCL filter on PV Inverter based on Taguchi method (다구치 방법론을 이용한 태양광 인버터의 LCL 필터 설계)

  • Kim, Byeong-Heon;Chee, Seung-Jun;Sul, Seung-Ki
    • Proceedings of the KIPE Conference
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    • pp.232-233
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    • 2013
  • 본 논문에서는 태양광 인버터에서 전력 품질 개선을 위해서 사용되는 LCL 필터의 설계 방법을 제시한다. 제안된 방법은 생산 품질의 질을 향상시키기 위해 산업체에서 사용되고 있는 다구치 방법론을 이용한다. 기존 설계에서 고려되던 출력 전력 품질(THD), 인덕터의 크기뿐만 아니라 태양광 인버터의 손실, 광량 변화로 인한 입력 조건의 변화, 출력 전압의 변화를 고려하여 설계한다. 설계 결과는 설계 목표 기능 변수를 향상시키고 동시에 그 변동량을 최소화할 수 있다.

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Prioritizing Technology Elements in New Product Development Using QFD and Taguchi Method (신제품 개발 프로젝트에서의 요소기술 중요도 결정 방안 : QFD와 다구치 방법의 적용)

  • Yang, Jong-Seo;Yun, Myung-Hwan;Yoon, Il-Bae;Park, Yong-Tae
    • Journal of Technology Innovation
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    • v.12 no.3
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    • pp.111-134
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    • 2004
  • Current technology innovation or new product development project is composed of various process elements that conduct researches on fundamental technologies. However, with the effects of PERT and CPM, the greater part of the existing project management researches have only focused on the resource allocation and scheduling. But in the multi-project environment, priorities between technology elements need to be considered. Furthermore, a disagreement of opinion between project managers and researchers should be considered. In this study, technology element priority was determined using modified QFD and Taguchi method. Outcome of each method was compared to analyze the difference between project managers and researchers. As a result, QFD method showed relatively high level of consistency between project managers and researchers.

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A Study on Ship Shape Design Optimization for RCS Reduction Using Taguchi Method (다구치 방법을 이용한 함정 RCS 형상최적화에 관한 연구)

  • Cho, Yong-Jin;Park, Dong-Hoon;Ahn, Jong-Woo;Park, Cheol-Soo
    • Journal of the Society of Naval Architects of Korea
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    • v.43 no.6
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    • pp.693-699
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    • 2006
  • This paper proposes a design optimization technique for ship RCS signature reductions using Taguchi method. The proposed technique comprises of i)evaluating initial RCS signatures, ii)defining critical areas which should be modified as design parameters, and threat factors which can't be controlled artificially as noise parameters, and finally iv)finding optimum parameters via analyzing signal to noise ratios for designated characteristics. We applied the technique to a model ship and found that it is suitable for radar stealth designs. In addition, the proposed technique is applicable to submarine designs against sonar threats.

Design of Automotive Fuel Tank for Preventing Liquid Carry Over Using Taguchi Method and Approximate Optimization (다구치 방법과 근사최적설계를 이용한 자동차 연료탱크의 연료 넘침 방지 시스템 설계)

  • Park, Gyu-Byung;Lee, Yongbin;Cho, In-Geun;Choi, Dong-Hoon
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.37 no.8
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    • pp.1059-1067
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    • 2013
  • Automotive fuel tank is generally divided into two parts: main frame and assembly parts. While the car is running, valves are used to prevent liquid carry over and to discharge evaporated gas from the fuel tank. However, current fuel tank designs focus on the gas ventilation or secured location. In this study, the location of the parts used to prevent liquid carry over within the fuel tank is evaluated during an optimal design process. To develop this design process, an approximate optimization is applied. Through the optimal design process, the optimal valve location in fuel tank is determined and the approximate optimization is validated by the Taguchi method. Finally, the optimized valve location is used to reduce the development cost and time and to contribute toward improved automobile quality owing to enhanced reliability.

Optimum Machining Condition Determination for Pedicle Screw using Experimental Design Method (실험계획법에 의한 척추경 나사의 최적 절삭조건 결정)

  • Jang, Sung-Min;Cho, Myeong-Woo
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.3 no.2
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    • pp.3-9
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    • 2004
  • The main objectives of this paper are to determine optimum cutting conditions using experimental design method to manufacture pedicle screws. Generally, titanium alloys are known as difficult-to cut materials. In the machining of titanium alloy, high cutting temperature and strong chemical affinity between the tool and the work material are generated because of Its low thermal conductivity and chemical reactivity. Such phenomenon cause increase of tool wear and deterioration of surface quality. Thus, in this paper, required experimental investigations are performed to evaluate the machinability of titanium materials With tungsten carbide tools Required simulation and experiments are performed, and the results are investigated.

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Evaluation of Grinding Machining Characteristics of $ZrO_2$ Ferrule Using the Taguchi Method (다구치 방법을 이용한 지르코니아 세라믹스 페룰의 연삭 가공 특성 평가)

  • 김기환;최영재;홍원표;이석우;최헌종
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.516-519
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    • 2004
  • As the optical communication industry is developed, the demand of optical communication part is increasing. ZrO$_2$ ceramic ferrule is very important part which can determines the transmission efficiency and information quality to connect the optical fibers. In general ZrO$_2$ ceramic ferrule is manufactured by grinding process because the demands precision is very high. And the co-axle grinding process of ZrO$_2$ ceramic ferrule is to make its concentricity all of uniform before centerless grinding. This paper deals with the analysis of the process parameters such as grinding wheel speed, grinding feedrate and regulating wheel speed as influential factors, on the concentricity and surface finish developed based on Taguchi's experimental design methods. Taguchi s tools such as orthogonal array, signal-to-noise ratio, factor effect analysis, etc. have been used for this purpose optimal condition has been found out. Thus, if possible be finding highly efficient and quality grinding conditions.

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Taguchi's Robust Design Method for Optimization of Grinding Condition by Hammer Mill (다구치 방법을 활용한 해머밀 분쇄공정의 최적화 연구)

  • Choe, Hong-Il;Kim, Byoung-Gon;Park, Chong-Lyuck;Jeong, Soo-Bok;Jeon, Ho-Seok;Jang, Hee-Dong
    • Journal of the Mineralogical Society of Korea
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    • v.23 no.3
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    • pp.219-225
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    • 2010
  • Optimal grinding condition was examined by changing only the size of screen opening with fixing other factors to produce coal fines of particle sizes required for circulating fluidized bed gasifier. At least 85 wt% of the coal particles should fall into the size range of 0.045~1.0 mm for efficient gasification. In this study, hammer mill was used to grind Chinese low rank lignite coal following grinding condition designed by Taguchi method. The analysis of signal to noise ratio showed that optimum grinding condition for the gasifier was 3 mm in primary screen size and 1.3 mm in secondary screen size on the 95% level of significance.