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실험계획법을 이용한 CAE기반 Road Noise 개선 연구
권우성(Woosung Kwon),유봉준(Bongjun Yoo),김병훈(Byounghoon Kim),박광서(Kwangseo Park) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
In the early phase of vehicle development, CAE is conducted as tool for vehicle performance assessment. To maintain acceptable road noise performance, solution for reduced vehicle sensitivity is required. Chassis interface dynamic stiffness characteristics are key component to isolating vibration and noise of road from the vehicle interior. This research provide how to set up the optimized dynamic characteristics under noise factors. CAE-based DOE is performed to build prediction math model, CMS process involves DOE to achieve very fast run times while giving results very comparable. Minimized 95<SUP>th</SUP> percentile of performance distribution is applied to minimize vehicle sensitivity and absolute road noise levels variation is during the optimization process. Finally, the results of optimization were reviewed for performance and robustness.
직교배열표를 이용한 이산설계 공간에서의 Steering System 설계
권우성(Woosung Kwon),박우선(Woosun Park),김동석(Dongseok Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The design of experiment (DOE) with orthogonal arrays is adopted when the engineering design is needed in a discrete design space. In this research, a design process with orthogonal array is performed to obtain the optimum design which satisfy the frequency target of the steering system. The optimum design is determined from the analysis of means (ANOH) and sensitivity information about design variables is evaluated by the analysis of variance (ANOVA). Interactions between design variables are investigated to achieve additivity which should be valid in using orthogonal array. It is shown that when strong interactions exist, the DOE process with orthogonal array considering interaction is introduced to find out optimum design .
로드 노이즈 개선을 위한 전산응용해석 기반 DFSS 연구
권우성(Kwon, Woo-Sung),유봉준(Yoo, Bong-Jun),김병훈(Kim, Byoung-Hoon),김인동(Kim, In-Dong) 한국소음진동공학회 2011 한국소음진동공학회 논문집 Vol.21 No.7
In the early phase of vehicle development, CAE is conducted as tool for vehicle performance assessment. To maintain acceptable road noise performance, solution for reduced vehicle sensitivity is required. Chassis interface dynamic stiffness characteristics are key component to isolating vibration and noise of road from the vehicle interior. This research provide how to set up the optimized dynamic characteristics under noise effect through DFSS study. CAE-based DOE is performed to build prediction math model, CMS process involves DOE to achieve very fast run times while giving results very comparable. Minimized 95th percentile of performance distribution is applied to minimize vehicle sensitivity and road noise levels variation during the optimization process. Finally, the results of optimization were reviewed for performance and robustness.
Road Noise 개선을 위한 CAE 기반 DFSS Study
권우성(Woosung Kwon),유봉준(Bongjun Yoo),김병훈(Byounghoon Kim),김인동(Indong Kim) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.4
In the early phase of vehicle development, CAE is conducted as tool for vehicle performance assessment. To maintain acceptable road noise performance, solution for reduced vehicle sensitivity is required. Chassis interface dynamic stiffness characteristics are key component to isolating vibration and noise of road from the vehicle interior. This research provide how to set up the optimized dynamic characteristics under noise effect through DFSS study. CAE-based DOE is performed to build prediction math model, CMS process involves DOE to achieve very fast run times while giving results very comparable. Minimized 95<SUP>th</SUP> percentile of performance distribution is applied to minimize vehicle sensitivity and road noise levels variation during the optimization process. Finally, the results of optimization were reviewed for performance and robustness.
중학생의 또래관계 스트레스가 우울에 미치는 영향: 거부민감성과 인지적 유연성의 조절된 매개효과
우성실(Woo, Sung-sil),권경인(Kwon, Kyoung-in) 한국교육치료학회 2021 교육치료연구 Vol.13 No.1
본 연구는 중학생의 또래관계 스트레스와 우울 간의 관계를 거부민감성이 매개하며, 이 경로를 인지적 유연성이 조절하는지 알아보기 위하여 조절된 매개효과를 검증하였다. 이를 위해 서울, 경기에 소재한 중학교 5개교의 3학년 재학생 600명을 대상으로 설문을 실시하였고, 그중 불성실한 자료를 제외한 567명의 자료를 분석하였다. 연구 결과는 다음과 같다. 첫째, 또래관계 스트레스와 우울 간의 관계에서 거부민감성의 매개효과가 검증되었다. 둘째, 거부민감성과 우울 간의 관계에서 인지적 유연성의 조절효과가 검증되었다. 마지막으로 또래관계 스트레스가 거부민감성을 매개하여 우울로 이어지는 경로에서 인지적 유연성의 조절된 매개효과가 나타났다. 이러한 결과는 다음과 같은 시사점을 가진다. 첫째, 또래관계 스트레스가 우울에 영향을 미치는 종합적인 경로의 검증을 통해 중학생의 우울에 대한 보다 통합적인 이해를 도모할 수 있다는 점이다. 둘째, 거부민감성의 영향에 대한 대처 전략으로 인지적 유연성의 역할을 통한 긍정적 개입의 가능성을 확인한 점이다. The purpose of this study was to examine the moderated mediating effect of cognitive flexibility through rejection sensitivity on the relationship between middle school students peer relationship stress and depression. For this purpose, 600 students from five middle schools in Seoul and Gyeonggi Province were surveyed, and 567 of them were analyzed, excluding unfaithful data. The results are as follows. First, the mediating effect of rejection sensitivity was verified in the relationship between peer relationship stress and depression. Second, the moderating effect of cognitive flexibility was confirmed in the relationship between rejection sensitivity and depression. Finally, the moderated mediating effect of cognitive flexibility was significant in the path from peer relationship stress leading to depression through rejection sensitivity mediation. These results have the following implications. First, it is possible to promote a more integrated understanding of middle school students depression by verifying a comprehensive path in which peer stress affects depression. Second, it identified the possibility of positive intervention through identifying the role of cognitive flexibility as a strategy for coping with the effects of rejection sensitivity.
터널 화재발생시 시뮬레이션 프로그램을 통한 승객대피계획
권순섭(Kwon Soon Sub),이종선(Lee Jong Sun),이관호(Lee Kwan Ho),권우성(Kwon Woo Sung) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
Fire accident in tunnel is one of the most critical railway accidents, together with overturning of train by derailment and train crash. Tunnel structures contribute to minimize the cost and time of transport, but in case of railway fire accident occurring bring serious damages of human life caused by narrowness of shelter, poisonous smoke and high temperature raised at the inside of tunnel. For that reason, at the beginning of plan of tunnel, the optimum design for rescue of passengers is needed. For the detail and most suitable design for rescue of passengers, many tunnel designer substituted simulation program for mock examination by its high cost and effort. In this study, simulation program techniques, such as Fluent and Simulex, are applied for verifying the rescue design of passengers reduced the risk when fire accident occurred at tunnel utilizing of case study for planned railway tunnels shows 1,245m length in Iksan-Sili area.