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차량환경에서의 와이어 종류에 따른 커플링 노이즈 계산과 저감 방안에 대한 연구
송승우(Seungwoo Song),김일구(Ealgoo Kim),Trinh Qui Ngoc,이태연(Taeyoen Lee),박재홍(Jaehong Park) 한국자동차공학회 2006 한국자동차공학회 Symposium Vol.- No.-
In this paper, noise between each type of wires in automotive is considered. Characteristic of coupling noise for each wire types is different. For different wire types like normal wire, twisted pair and shielded wire, the noise coupling varies. The noise for each wire type is calculated using models for near end and far end cases. The magnitude of coupling noise form noise source to each wire as noise receptor can be calculated with overlapped length and distance between source and receptor wires. This paper treats modeling of coupling between two wires and calculation of coupling noise. Result of this paper can be used as methods of wiring design to avoid noise problem.
AISI 420 stainless steel 기판위에 D.C magnetron sputtering 법으로 제조한 TiN 박막의 특성 평가
송승우(Seungwoo Song),최한철(Hancheol Choe),김영만(Youngman Kim) 한국표면공학회 2006 한국표면공학회지 Vol.39 No.5
Titanium nitride (TiN) coatings were produced on AISI 420 stainless steel by DC magnetron sputtering of a Ti target changing the processing variables, such as the flow rate of N₂/Ar, substrate temperature and the existence of Ti interlayer between TiN coatings and substrates. The hardness and residual stress in the films were investigated using nanoindentation and a laser scanning device, respectively. The stoichiometry and surface morphology were investigated using X-Ray Diffraction and SEM. The corrosion property of the films was also s tudied using a polarization method in NaCl (0.9%) solution. Mechanical properties including hardness and residual stress were related to the ratio of N₂/Ar flow rate. The corrosion resistance also was related to the processing variables.