• Title/Summary/Keyword: 진동 장치

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Touch Variation due to Vibration (미세 진동에 따른 촉감의 변화)

  • 박연규;강대임;양희선
    • Proceedings of the Korean Society for Emotion and Sensibility Conference
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    • 1999.11a
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    • pp.379-382
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    • 1999

  • 본 논문에서는 촉각의 효과적인 제시를 위한 하나의 보조수단으로 진동의 제시를 상정하고, 이를 위한 사전작업으로 진동에 따른 촉감의 변화를 파악하고자 하였다. 이를 위하여 진동 제시 장치를 제작하였고, 진동에 의한 촉감의 효율적인 평가를 위하여 손가락을 제외한 다른 경로로의 진동 전달 및 소음 전달을 차단하고자 하였다. 또한, 진동과 관련된 물리량으로 주파수와 진폭을 결정하였으며 이를 정량화 하였다. 본 연구의 목적이 진동에 의한 촉감의 미세조정과 관련된 것임을 고려하여 주관 평가 시 진동의 제시는 각 주파수별로 진동에 의한 촉감의 변화가 발생하는 기준 진폭으로 하였다. 주관 평과 결과, 주파수가 증가할수록 더 매끄럽게 느끼며 그 감각이 분명해 짐을 확인할 수 있었다.

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Experimental Study of Friction Pendulum System to Improve the Seismic Capacity of Transformer (변압기의 내진성능 향상을 위한 마찰진자 면진장치의 시험 연구)

  • Jang, Jung-Bum;Kim, Jeong-Ki;Hwang, Kyeong-Min;Ham, Kyung-Won;Park, Jin-Wan;Lee, Chan-Wook
    • Journal of the Earthquake Engineering Society of Korea
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    • v.12 no.2
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    • pp.1-8
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    • 2008

  • Friction pendulum system is developed to prevent the damage of transformer, which is the most important among the electric power facilities, due to the earthquake and its seismic capacity is verified through the shaking table test. The applicability of friction pendulum system is confirmed as test results of compressive capacity test and friction test. Especially, as a result of shaking table test with a large scale transformer model, friction pendulum system gives to the reduction of maximum response acceleration by 30% at anchorage of transformer and 59% at the top of porcelain bushing comparing with the existing anchorage type. In addition to the reduction of maximum response acceleration, natural frequency of transformer is shifted to long period due to the friction pendulum system. In case that friction pendulum system is applied to the transformer, the damage of transformer can be prevented effectively under the earthquake.

  • https://doi.org/10.5000/EESK.2008.12.2.001 인용 PDF KSCI

Fault Diagnosis of a High-speed Railway Reduction Unit Using Analysis of Vibration Characteristics (고속철도차량 감속구동장치의 이상진단을 위한 진동특성분석)

  • Ji, Hae Young;Lee, Kang Ho;Kim, Jae Chul;Lee, Dong Hyoung;Moon, Kyoung Ho
    • Journal of the Korean Society for Railway
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    • v.16 no.1
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    • pp.26-31
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    • 2013

  • The reduction unit is one of the most important components for railway vehicles because the torque of the motor must be transmitted to the wheels of the vehicle by the reduction unit. The faults in the reduction units of high-speed trains are caused by damage such as gear, fatigue. These have serious impacts on safety of the train during operation. To address this development of a system for monitoring, fault diagnosis of the reduction unit is needed to keep the vehicle running safely. Before that can be accomplished, it is most important to understand the vibration characteristics of the reduction unit in a normal state. Vibration diagnosis technology using characteristic-analysis of vibration waveform and frequency is known to be the most effective method for fault diagnosis. In this paper, we analyzed the vibration characteristics of the reduction units two Korean high-speed trains (KTX and KTX II), under normal conditions, by two test methods (driving gear test, full-vehicle test).

  • https://doi.org/10.7782/JKSR.2013.16.1.026 인용 PDF KSCI