• Proceedings of the KIPE Conference
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• 2013.11a
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• pp.182-183
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• 2013

본 논문은 PMSM의 고속 운전시 약자속 제어를 수행했을 때와 수행하지 않았을 경우의 소음 특성을 분석한다. 이를 위하여 두 가지 경우에 관하여 운전 시 발생하는 소음과 진동을 측정하여 그 주파수 특성을 분석하고, 그로부터 소음과 진동을 저감하기 위한 방법을 제시하였다. 자동차용 샤시 제어 모터를 대상으로 실험을 수행하고 제시한 방법의 유효성을 확인하였다.

• Computational Structural Engineering
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• v.10 no.3
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• pp.58-66
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• 1997

D 자동차가 새 자동차를 개발하는 과정에 스타일 디자인은 이태리에서, 샤시 설계는 영국에서, 파워트레인 설계는 독일에서 수행하였다고 한다. 글로벌 경영이나 현지 법인이라는 단어들도 이제는 낯설지 않은 용어들로 자리잡아 가고 있는 중이며, 앞으로는 리비아, 우즈베키스탄, 베네주엘라 등 전세계에 흩어져 있는 기업의 현장을 어떻게 운영해 나갈 것인지를 연구해야 할 것이다. 무역장벽을 극복하기 위해 설립하고 있는 현지의 공장들을 서울에 앉아서 가동시키는 방법 중에, 인터넷을 이용하는 방안이 CALS(Commerce At Light Speed 또는 Computer Aided Logistic Support)라고 할 수 있다. 이는 인터넷을 통해 기업의 무역거래 서류, 카탈로그, 설계도면, 사용자 지침서 등을 전자문서로 주고 받을 수 있게 하겠다는 생각에서 추진되고 있는 프로젝트이다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2009.04a
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• pp.559-560
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• 2009

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2001.11a
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• pp.211-212
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• 2001

자동차 생산공정은 일반적으로 프레스, 차체, 도장, 의장으로 구분되어 진다. 특히 차량의 조립 완성 후 엔진과 하부 샤시를 검사하는 Test 라인 공정에서는 차량운전 상태에서만 검사를 실시하는 작업특성 때문에 자동차 배기가스가 실내환경 오염을 유발하고 있다. 그래서 대부분 자동차 공장의 경우 배출가스에 대한 제어방식 및 배기 유량 부족으로 자동차 생산을 위하여 실내에서 작업하는 근로자들에게 두통 및 호흡기질환이 유발되고 있다. (중략)

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2011.06a
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• pp.1183-1184
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• 2011

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.11a
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• pp.899-900
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• 2010

• Journal of KSNVE
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• v.8 no.6
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• pp.1158-1165
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• 1998

Low frequency interior noise in cars is mainly due to structure-borne excitations which are related with road excitation and component vibrations such as suspension and engine mounts. In order to analyze the annoying interior noise. a technique (Transfer Path Analysis) is introduced to find a noise source and the path of that noise. In this study, TPA is reviewed theoretically and applied to investigate the case when the low frequency interior noise at front seat due to road excitations needs to be optimized. The subjective and objective appraisal was performed under the conditions that a testing vehicle traveled on asphalt at 30 km/h. so that the low frequency to be eliminated was detected. The related vibration and noise data for TPA were measured on running and static vehicle. The results reveal that the noise contribution along the z-direction of trailing arm is prominent to low frequency interior noise.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.34 no.10
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• pp.1419-1425
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• 2010

Boron steel sheet is suitable for fabricating automobile parts because it is very strong and has low weight. Recently, many car makers are investigating the feasibility of fabricating the chassis part of automobiles using boron steel. In order to use boron steel sheets to fabricate the chassis part of automobiles, much better material property of low cycle fatigue life as well as high formability during hot stamping is required. Therefore, the low-cycle fatigue life of hot-stamped quenched boron steel was investigated in this study. The fatigue life observed at low strain amplitude was longer than that of an as-received boron steel sheet. However, the fatigue life reduced at high strain amplitude because of the low ductility and low fracture toughness of martensite, which was produced as a result of hot stamping.

• Journal of the Korean Institute of Telematics and Electronics S
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• v.35S no.9
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• pp.43-52
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• 1998

In this paper, a novel type of an integrated controller is designed for vehicles equipped with active classis systems to improve vehicle stability, handling, and ride comfort. The hybrid fuzzy logic controller consists of a fuzzy logic controller, a skyhook controller, an attitude controller, and a roll moment distribution controller, and these controllers are used with a proper combination which is determined by the integrated control logic based on driving conditions of a vehicle. It is shown by simulations using MATRIXx/SYSTEMBBUILD software that ride comfort, handling, and active safety are improved for a 16 degree-of-freedom vehicle dynamic model.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.37 no.5
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• pp.673-678
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• 2013

Creep groan noise occurs at low frequencies immediately after releasing brake pressure or when a car stops. This noise can be used to predict problems in not only the brake system but also the vehicle system. Because of its complexity, it is difficult to determine its characteristics. Therefore, most improvements are conducted by changing the brake pad, and it still remains difficult to conduct a test using a vehicle. In this study, the characteristics of creep groan noise and the effects from a vehicle system are investigated by using vehicles and an NVH chassis-dynamometer through various tests. A new evaluation method for creep groan noise by using a vehicle is proposed, and the possibility of reduction schemes from the viewpoint of the vehicle system is confirmed from the results mentioned above.