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한미우(Miwoo Han),서동윤(Dongyoon Seo) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.5_2
Because previous evaluation of seat comfort depended on experiences and sensory jugement of expert, it was subjective rather than objective. And subjective feeling test performed by seat expert was not promoted many times because of time and cost in development phase of seat. Therefore, in this study, a systematic methodology was developed to evaluate seat comfort quantitatively. 35 subjects engaged in seat department were selected and rated 20 seats taken from large, middle, small and MPV vehicles. And each seat was tested according to Cushion Perfonnance Test procedure that consists of static load test, local hardness test, vibration transmissibility test and damping test. As a result, the following model to predict sitting comfort was regressed by using subjective and objective data of seat. Y24(Overall Comfort) = 1.458 + 0.128 CD3 + 0.107 BD3 - 0.222 BA + 0.023 CDFM - 0.046 CDMM + 0.065 CKD (R-square = 0.73) Overall comfort of seat can be estimated by this prediction model having seat cushion performance data(CD3, BD3, BA, CDFM, CDMM, CKD) as input variables. The model will allow more seats to be evaluated and improved quickly at low cost.
한미우(Miwoo Han),이병헌(Byungheon Lee),서동윤(Dongyoon Seo) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
DFSS(Design for Six Sigma) and Biomechanics were used to improve closing efforts of tail gate. Tail gate system<br/> was defined, identified, redesigned, optimized and verified in concurrence with the investigation of gas lifter’s<br/> manufacturing system. Also, Motion Analysis and Biomechanical Analysis were performed to measure L5/S1<br/> lumbar disc’s compression in closing tail gate. As the result, the new design had lower mean and variation of closing<br/> efforts than the old design. Percent of AF 5^th population incapable in torso to close tail gate was reduced 63% to 7%.