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다구찌 방법을 활용한 Rear Center-Hinge Bracket 강건 설계
정세빈(Sebin Jung),김민호(Minho Kim) 한국자동차공학회 2014 한국 자동차공학회논문집 Vol.22 No.3
The rear center-hinge bracket is designed for supporting and folding the rear-seat backrest. This bracket needs to be strong enough to be able to rigidly hold the rear-seat backrest and to withstand luggage loads from the car trunk that are generated when a vehicle is driving on the roads. Particularly, current accident studies report that many serious occupant injuries occurred when the rear-seat back easily folded inward toward the car interior, driven by the luggage loads in the trunk. Given this fact, the robust design of the rear center-hinge bracket that mainly supports the rear backrest has become more important for providing customer safety and preventing high warranty and durability problems. However, none of the studies have emphasized its significant role and considered its robust optimization. Therefore, this paper presents how the hinge-bracket design is optimized based on an application of the finite-element method coupled with the parameter design using Taguchi’s design experiment. Finally, Taguchi method’s application optimizes a robust center-hinge bracket that shows more rigid performance although it has lighter weight and thinner thickness.
정세빈(Sebin Jung) 한국자동차공학회 2014 한국 자동차공학회논문집 Vol.22 No.3
Driving-related injuries associated with elderly drivers are on the rise, although the overall rate of driving-related injuries has decreased. To determine the causes of this trend, we researched existing vehicle systems that use different sensors and signals to promote safe driving. We found that although the systems alert drivers to potential collisions and assist them in finding a location easily, they were created by people who rarely use the systems in their daily lives. For the most part, theyre not created by people with driving difficulties caused by health problems, which in turn often afflict the elderly. To address this issue, we analyzed the drawbacks of the current systems and used a focus group of people with body conditions that have declined due to age to discover the problems they encounter while driving. With the focus group, we used diverse research activities, such as observation and interview to demonstrate how new system concepts could be developed for the elderly. Finally, we propose that adequate system concepts for the elderly would improve driving safety and provide a more enjoyable driving environment for this population.
쿠션 폼 패드의 경도 및 히스테리시스 곡선을 통한 자동차 시트 컴포트 개선 방안 연구
정세빈(Sebin Jung),정승태(Sungtae Jeong) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
As time spent in our vehicles increases, requests for automotive seat comfort have also increased. In particular, extended seat use typically causes the seats foam pad to sag or distort. Therefore, this study develop a new seat foam pad by applying different evaluation specifications, such as two different harness specifications and hysteresis loss rate. Based on the new specifications, a new seat foam was verified with three tests ? harness, force-deflection, and compression ? that compared it a sagging, uncomfortable foam pad. Finally, the newly developed foam pad with applied enhanced specifications proved that it offers better performance than the pad originally issued in the vehicle.