• Title/Summary/Keyword: 실험계획법

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Process Design of a Hot Forged Product Using the Artificial Neural Network and the Statistical Design of Experiments (신경망과 실험계획법을 이용한 열간 단조품의 공정설계)

  • 김동환;김동진;김호관;김병민;최재찬
    • Journal of the Korean Society for Precision Engineering
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    • v.15 no.9
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    • pp.15-24
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    • 1998
  • In this research. we have proposed a new technique to determine .the combination of design parameters for the process design of a hot forged product using artificial neural network(ANN) and statistical design of experiments(DOE). The investigated problem involves the adequate selection of the aspect ratio of billet, the ram velocity and the friction factor as design parameters. An optimal billet satisfying the forming limitation, die filling, load and energy as well as more uniform distribution of effective strain, is determined by applying the ability of artificial neural network and considering the analysis of mean and variation on the functional requirement. This methodology will be helpful in designing and controlling parameters on the shop floor which would yield the best design solution.

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Optimization of Grinding Conditions and Prediction of Surface Roughness Using Taguchi Experimental Design (Taguchi 실험계획법에 의한 연삭가공조건 최적화 및 표면거칠기 예측)

  • 곽재섭;하만경
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.7
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    • pp.37-45
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    • 2004
  • Grinding is a finishing operation of products in various areas. Surface roughness of industrial components obtained in grinding operation is a critical quality measure but is a function of many operating parameters and their interactions. To achieve higher surface roughness and to identify the influence of grinding parameters on surface roughness, it is an ideal situation fer using the design of experiments. This paper presents an successful optimization of grinding conditions and prediction of surface roughness using the design of experiments. From the experimental verification tests, it was observed that this approach was useful as a robust design methodology for grinding operation.

Wear Loss Presumption of Motorcycle Disk Brake Using Design of Experiment (실험계획법에 의한 이륜자동차 브레이크 디스크의 마멸량 예측)

  • Park, Gyu-Jung;Park, Heung-Sik
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.6 no.4
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    • pp.15-21
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    • 2007
  • The effect of manufacturing parameters on friction characteristics of motorcycle break system was studied using a disk-on-pad type friction tester. Such parameters conditions have an effect on the frictional factor such as number of ventilated disk hole, applied load, sliding speed, and sliding distance. However, it is difficult to know the mutual relation of these factors. In this study, the friction characteristics using design of experiment containing 4 elements were investigated for an optimal condition for the best motorcycle break system employing regression analysis method. From this study, the result was shown that the applied load in frictional factors was the most important, next to sliding speed, number of ventilated disk hole.

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Optimal Design for a Structure Using Design of Experiment (실험계획법을 이용한 구조물의 최적설계)

  • 고성호;한석영;최형연
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2001.04a
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    • pp.34-39
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    • 2001
  • The median barrier is one of the roadside hardware to prevent severe human and property damage from highway traffic accidents. The foreign standard of concrete median barrier was introduced and implemented without modification fitting to domestic vehicle and highway condition. In a car accident, median barrier doesn't protect vehicle effectively, especially for heavy vehicle such as bus and heavy truck. The purpose of this study is to develop the optimal performance design of concrete median barrier using the design of experiment with crash simulation analysis which is done by Pam-Crash that is one of the commercial crash simulation software. As a result of this study, an optimal design of concrete median barrier is obtained considering von Mises stress, volume and COG acceleration of truck.

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A study on the Internal machining of a large-diameter Stainless pipe for Semiconductor Using Experimental Design Method (실험계획법을 이용한 반도체용 대구경 스테인레스관의 내경 가공에 관한 연구)

  • 김창근;이은상
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2003.10a
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    • pp.71-76
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    • 2003
  • This paper describes the characteristic of a large-diameter pipe to obtain smooth surface using Electropolishing after grinding using a non-woven fabric. Grinding using a non-woven fabric is possible under lower load and fine effect comparing with Wheel grinding. Also, the ion from the surface of the metal is eliminated by means of an electrical potential and current in Electropolishing. Electropolishing is used for leveling the surface, improving the physical appearance of the part, promoting corrosion properties and reducing contamination and adhesion of the surface. Therefore, the aim of the present study is to investigate the internal machining of a large-diameter pipe for semiconductor using experimental design method.

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Structural Design for 2kW Class Wind Turbine Blade by using Design of Experiment (실험계획법을 이용한 2kW급 풍력발전용 블레이드에 대한 구조설계)

  • Lee, Seung-Pyo;Kang, Ki-Weon;Chang, Se-Myong;Lee, Jang-Ho
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.20 no.1
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    • pp.28-33
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    • 2011
  • In this paper, structural design for 2kW class composite blade is performed by using design of experiment(DOE). A full factorial design is applied to meet the design specifications at the manufacturing process. The analysis of variance(ANOVA) is made in order to determine the significance of effects in an analysis. Structural analysis by using of commercial software ABAQUS is performed to compute the displacement and safety factor of filament wound composite blade. The results show that the proposed method is suitable to analyze the factors at the design of wind turbine blade.

실험계획법을 이용한 다층 퍼셉트론 인공 신경망의 구조 설계

  • Lee, Seok-Ho;Kang, Dae-Cheon;Lee, Chan;Kang, Mu-Jin
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1996.04a
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    • pp.536-540
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    • 1996
  • 경험과 학습을 바탕으로 새로운 상황에 대처하는 인간의 신경계에서의 신경세포들의 상호작용을 규명하는 일은 많은 과학자들을 매료시켜 왔다. 이와 함께, 생물학적인 신경계를 닮은 인공적인 신경망을 구축하여 감지하고, 인식하고, 구별하고, 판단하는 일에 이용하고자 하는 노력도 끊임없이 진행되어 왔다. 인공 신경망의 구성은 전적으로 많은 경우의 수에 대한 테스트에 의존하게 되는 데, 이 경우 시간도 대단히 많이 소요 될 뿐더러 체계적으로 가장 좋아 보이는 신경망 모델에 도달하였는 지도 확실치 않다. 따라서 , 본 논문에서는 실험계획법을 다층 퍼셉트론 신경망의구조설계에 적용하여 적은 실험횟수로 적합한 신경망 모델을 구성할 수 있음을 검증하고, 실제사례에 적용하여 그 유용성을 제시하고자 한다.

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Optimal Grinding Condition Using the Design of Experiments (실험계획법을 이용한 최적연삭조건)

  • 이대욱;오창진;김성청;김옥현
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.11a
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    • pp.866-869
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    • 2000
  • To improve quality of the ground surface, we have to consider a number of parameters. But it is difficult to make experiment with many parameters. Most of all experiments try to search optimal grinding condition with conservative factors such as feed rate, depth of cut, wheel rotating speed, etc. But This paper attempts to view the significance of some different factors effecting on the surface roughness by introducing helical scan grinding method and material removal rate. The design of experiment is used to find the optimal grinding condition which minimizes the surface roughness value bout optical glass material. To analyze experimental results, ANOVA(ANalysis of VAriation) is used. Discussion on the result about helical scan grinding is also given.

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Optimum Design of Impact Absorbing System for Spreader by Using a Design of Experiments (실험계획법을 이용한 스프레더용 충격흡수기의 최적설계)

  • 노영희;홍도관;김동영;안찬우;한근조
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.1529-1532
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    • 2003
  • This paper deals with the impact analysis of the impact absorbing system consist of one degree of freedom and two degree of freedom damping-spring system in spreader to increase efficiency of it. It shows the optimum damping coefficient and spring constant of impact absorbing system using for crane spreader and the optimum condition of impact absorbing system causing certain contact impulse. In the optimal model, the contact impulse is reduced 98.57 percent and 92.22 percent respectively.

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Analysis of Heat Treatment Process Conditions for Output Characteristics of Permalloy Core on Current Sensors using DOE (실험계획법을 이용한 퍼멀로이 전류 코어 센서의 출력특성에 관한 열처리 공정조건 분석)

  • Kim, Young Shin;Kim, Yoon Sang;Jeon, Euy Sik
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.19 no.4
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    • pp.16-23
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    • 2020
  • An electric vehicle operates at high currents and requires real-time monitoring of the entire system for ensuring efficiency and safety of the vehicle. Current sensors are applied to drive the motors, inverters, and battery control systems, and are the key components to ensure constant monitoring of the magnitude and waveforms of the operating current. In this study, a heat treatment process condition to influence the performance of Permalloy current sensors was developed; the correlation between the output capacity, low-temperature characteristics, and high-temperature characteristics of the current sensor was studied; and the process was optimized to meet the required output accuracy and temperature characteristics.