http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
[진동·소음부문] 음향 홀로그래피를 이용한 자동차 타이어의 전연과 후연 소음의 구분 가능성에 대한 연구
남경욱(Kyoung-Uk Nam),김양한(Yang-Hann Kim) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Tire noise is generated by several noise sources. For the effective control of the tire noise, it is necessary to separate the contributions of the sources to sound field. However, it is difficult to separate the leading edge and trailing edge noise of tire, because they have the same frequency band. This paper performed the basic experiment for the separation of the leading and trailing edge noise. The experiment on two incoherent speakers showed the possibility to separate of leading and trailing edge noise.
이강덕(Kang-Duck Ih),남경욱(Kyoung-Uk Nam) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Image blurring caused by mirror vibration are studied. Possible causes of image blurring are reviewed, including road inputs and engine vibration inputs through vehicle body, and a variety of aerodynamic inputs. Experiments are carried out to understand the relative influence of the causes of vibration with real ear. Influence of experimental noise factor such as mass of accelerometers, mounting positions and mirror setting angles are studied. On road test and wind tunnel test are carried out to differentiate the mechanical vibration and aerodynamic vibration from the real vibration of on road driving. Strategic countermeasure is roughly proposed in this paper.
김무상(Moosang Kim),남경욱(Kyoung-Uk Nam) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
This paper introduces the process of reducing the automobile wind noise by using acoustic holography. First, a microphone array scans a side or plane under an automible step-by-step. Second, a pressure on a source plane is calculated. Third process is to analyze how much individual sources contribute to interior noise. Fourth process is to control important noise sources determined by the contribution analysis. This paper deals with the entire process, theoretical and experimental problems.