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차량 외관 및 공력 개선을 위한 Dual Motion AAF 메커니즘 연구
이경암(Kyeong Am, Lee),변재섭(Jae Sup, Byun),김명기(Myeong Ki, Kim),최재섭(Jae Seob, Choi),김준형(June Hyung, Kim),정필중(Phil Jung, Jeong) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
AAF(Active Air Flap) is located in the front of the vehicle and has the advantage of improving fuel efficiency by controlling the inflow of air required for engine cooling. In addition, the application rate of AAF is expanding due to recent environmental regulations and electrification of vehicles. In particular, to improve the aerodynamic performance of electric vehicles, the cooling area is reduced and moving designs are being tried to diversify the exterior design of the vehicle. In this study, we proposed a new AAF operation mechanism to realize various designs of vehicles and secure aerodynamic performance. Through this, an operating mechanism was implemented that maintains the operability of the existing AAF and improves the aerodynamics improvement effect.
정구민(Gu-Min Jeong),이경수(Kyeong-Su Lee),이경중(Kyung-Jung Lee),박창우(Chang-Woo Park),안현식(Hyun-Sik Ahn),이경우(Kyoungwoo Lee) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Due to the highly integration on semiconductors, variability and soft-errors have become important issues for the embedded system design. Especially, in embedded control systems, which are safety-critical, any single error or incorrect output can cause a catastrophic consequence. In this paper, we analyze the effect of soft errors on the electronic stability control(ESC) system and design a soft-error resilient controller for ESC. First, we study the effect of the soft-errors in ESC and show that soft-errors can be critical to the stability of ESC system. Next, based on the analysis, we propose a new soft-error resilient controller for ESC based on a cross-layer approach. The compensation is performed in both embedded system layer and the application layer. In the embedded system layer, the soft-error can be checked and recovered using a error correction code(ECC) or roll-back. In the application layer, by measuring the output of the system and the model, the controller can compensate for the soft-errors. From the experimental results considering the cross-layer approach, we show that the proposed method works well.