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This research studied robust design of column part for LCD transfer system. 1<SUP>st</SUP> DOE(Design of Experiment)was conducted to find out main effect factors. 36 experiments were performed and their results were shows that the geometric parameters(Low-length, Side-length, Upper-thickness, Middle-thickness)are more important than other factors. The main effect plots shows that the maximum deflection of column is minimized with increasing Low-length, Side-length, underthickness and Middle-thickness. 2<SUP>nd</SUP> DOE was conducted to obtain RMS(Response Surface Method)equation 25 experiments were conducted. The CCD(Central Composite Design)technique with four factors were used. The coefficient of determination (R²) for the calculated RSM equation was 0.986. Optimum design was conducted using the RSM equation Multi-island genetic algorithm was used to optimum design. Optimum value for Low-length, Side-length, Upper-thickness and Middle-thickness were 299.8㎜, 180.3㎜, 21.7㎜, 21.9㎜ respectively. An approximate value of 5.054㎜ in deflection was expected to be a maximum under the optimum conditions. Six sigma robust design was conducted to find out guideline for control range of design parameter. To acquire six sigma level reliability, the standard deviation of design parameter should be controlled within 2% of average design value.

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ABSTRACT
1. 서론
2. LCD 이송장치의 column 부
3. 실험계획법 및 최적설계
4. 식스 시그마 강건설계
5. 결론
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UCI(KEPA) : I410-ECN-0101-2009-555-016726462