• Title/Summary/Keyword: DOE(Design of experiments)

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Optimal Design of Slim TV Wall Mount Arm with Cantilever Structure (외팔보 구조의 슬림형 TV 월마운트암의 최적설계)

  • Jang, Woon-Geun
    • Journal of the Korean Society of Industry Convergence
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    • v.14 no.4
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    • pp.167-172
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    • 2011
  • This paper investigated optimal design for slim wall mount arm for flat TV. Recently the number of flat TV sets in use went on increasing in TV market. As the flat TV sets are getting common, consumers came to need another requirements like aesthetic factor besides display performances. As the new TV sets tend to be slimmer due to aesthetic design, Wall mount also requires to be slimmer for aesthetic balance. Slim structures, however, are vulnerable to structural rigidity. In this study, slim wall mount arm has been designed by 3D CAD and DOE (Design of Experiments) and finite element analysis for optimal structural design were carried out to determine the design variables for minimize working stress of wall mount arm. Finally two optimal design conditions were selected through DOE and FEM and one of those was chosen under constraint of minimizing blanking developed length.

Lightweight Design for Automotive Door Using Optimizations and Design of Experiments (최적화기법 및 실험계획 법을 이용한 자동차 도어의 경량화 설계)

  • 송세일;배금종;이권희;박경진
    • Transactions of the Korean Society of Automotive Engineers
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    • v.10 no.1
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    • pp.125-132
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    • 2002
  • Recently, ULSAB(Ultra Light Steel Auto Body) concept is getting more attention due to various benefits in automotive body design. One of the ULSAB efforts is making a door with TWB(Tailor Welded Blanks). In TWB, two or more patches of steel panels are welded together before stamping process. In this research, domains and thicknesses of the patches in a front door structure are determined by a series of optimization schemes composed of topology, size and shape optimization and DOE(Design of Experiments) scheme. A door is designed to have better performances compared to exiting structure considering static stiffness and natural frequency. The final design is discussed and compared to the existing design.

Study on decreasing displacement of the MC(machining center) moved column with high-speed for optimization of acceleration and DOE(Design Of Experiment) (가속도 최적화 및 형상 최적화를 통한 수직 컬럼 이동형 머시닝 센터의 진동 저감에 대한 연구)

  • Cho, Young-Duk;Lee, Choon-Man;Yoon, Sang-Hwan;Chung, Won-Jee
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.17 no.1
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    • pp.35-42
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    • 2008
  • By the reason of increased demand of high productivity and quality, the manufacturer have an effort in many directions of a machine tool industries. Among there, we proposed method of decreasing displacement in MC(machining center). In other words, Quality related with vibration of a tool cutting products. For decreasing it, improved by optimizing a shape of the column-part and acceleration curves of motors. In this paper we could find design factors has much influence on decreasing the displacement using the DOE(Design of Experiments) and optimized the level of the factors using $ADAMS^{(R)}$ and $MINITAB.^{(R)}$ And we suggest optimized a acceleration curve using $Matlab^{(R)}$.

Design Optimization of Mixed-flow Pump in a Fixed Meridional Shape

  • Kim, Sung;Choi, Young-Seok;Lee, Kyoung-Yong;Kim, Jun-Ho
    • International Journal of Fluid Machinery and Systems
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    • v.4 no.1
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    • pp.14-24
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    • 2011
  • In this paper, design optimization for mixed-flow pump impellers and diffusers has been studied using a commercial computational fluid dynamics (CFD) code and DOE (design of experiments). We also discussed how to improve the performance of the mixed-flow pump by designing the impeller and diffuser. Geometric design variables were defined by the vane plane development, which indicates the blade-angle distributions and length of the impeller and diffusers. The vane plane development was controlled using the blade-angle in a fixed meridional shape. First, the design optimization of the defined impeller geometric variables was achieved, and then the flow characteristics were analyzed in the point of incidence angle at the diffuser leading edge for the optimized impeller. Next, design optimizations of the defined diffuser shape variables were performed. The importance of the geometric design variables was analyzed using $2^k$ factorial designs, and the design optimization of the geometric variables was determined using the response surface method (RSM). The objective functions were defined as the total head and the total efficiency at the design flow rate. Based on the comparison of CFD results between the optimized pump and base design models, the reason for the performance improvement was discussed.

A Study on Railway Transportation Business Cost Estimation & Decision Supporting Methods using Simulation Data (시뮬레이션을 활용한 철도교통사업 비용 추산 및 의사결정 지원 방법 연구)

  • Chang, Suk;Nam, Do Woo;Sim, Jeong Hwan;Kim, Dong Hee
    • Journal of the Korea Society for Simulation
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    • v.29 no.4
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    • pp.85-94
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    • 2020
  • In determining the feasibility of planning and launching railway transportation projects, various decision-making processes are essentially required. LCC(Life Cycle Cost) value including total construction cost and operation cost is estimated in approximation Model with rough guideline. In this study, modeling and simulation-based analysis method is proposed to support the decision making process of railroad transportation and derivation of LCC. Firstly, cost analysis model was constructed by collecting various existing rail transportation business data to enable analyze based on numerical data, and the result were analyzed by DOE(Design Of Experiments) and RSM (Response Surface Method) simulation. Professional commercial software tools were used for effective model construction and simulation. In order to verify the research results, the actual railroad transportation projects were selected, and the results of the analysis were compared.

Optimal Design for Torsional Stiffness of the Tubular Space Frame of a Low-Cost Single Seat Race Car (저가 입문용 1인승 레이스카 Tubular Space Frame의 비틀림 강성 최적설계)

  • Jang, Woongeun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.15 no.10
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    • pp.5955-5962
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    • 2014
  • Generally, the frame design of a vehicle is a critical technology that plays an important role in the racing and high performance sports car market. The high performance of race car frame means that it requires high torsional stiffness because it directly affects the cornering behavior of the race car. The optimal design for the frame of a low-cost single seat race car was carried out using the DOE (Design Of Experiments) with Taguchi's orthogonal array and FEM (Finite Element Method) analysis to secure sufficient torsional stiffness in this paper. According to the results by DOE and FEM analysis, the optimal design case produced improved 10.7% and 14.5% improvement in each stiffness-to-weight ratio and frame weight than in the early design step. Therefore, this paper shows that the optimal design with Taguchi's orthogonal array is very useful and effective for designing a tubular space frame of a low-cost single seat race car in the early design step.

Design of Rotary Magnetic Position Sensor with Sinusoidally Magnetized Permanent Magnet (정현적으로 착자된 영구자석을 갖는 마그네틱 위치센서 설계)

  • Jeong, Seung-Ho;Rhyu, Se-Hyun;Kwon, Byung-Il
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.56 no.3
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    • pp.506-513
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    • 2007
  • This paper proposes a rotary magnetic position sensor which has a sinusoidally magnetized permanent magnet with a small number of poles. To make the sinusoidal magnetic flux density distribution from the permanent magnet, a magnetizing future is optimized by the DOE(Design of Experiments) method. The magnetization process is analyzed using the Preisach model and 2 dimensional finite element method. The magnetic flux density distribution from the magnetized permanent magnet is very similar to ideal sine wave. The simulation result of the magnetic flux density distribution is compared with the experimental one. Also the availability of the proposed rotary type magnetic position sensor is confirmed by position calculation technique.

A Case Study for Quality Improvement Process for the PCB Manufacturing (PCB 제조에 있어서의 품질개선 사례 연구)

  • 진홍기;백인권;손기목;서정원
    • Journal of Korean Society for Quality Management
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    • v.26 no.2
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    • pp.106-117
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    • 1998
  • The following study has been undertaken to build QIP (Quality Improvement Process) of an inner-layer process in a PCB (Printed Circuit Board) manufacturing plant. The objective of the study is stabilization and optimization of the process through quality improvement. To do that, defective factors in process are gathered by the cause and effect analysis and classified by PFD (Process Flow Diagram), key factors are found out by PFMECA (Process Failure Mode and Effect Criticalty Analisis), DOE(Design of Experiments) is a, pp.ied to those key factors to optimize the process, SPC (Statistical Process Control) chart is used to maintain the optimal conditions of the process and to improve quality continuously, and a quality management system is developed to improve quality mind and quality system for the PCB jmanufacturing plant. Overall, QIP is established to improve quality for the PCB manufacturing plant in the study.

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