• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 1994.10a
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• pp.62-66
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• 1994

본 연구에서는 실제 사용되고 있는 TDX-10 교환기의 subrack과 보드에 대한 진동 특성과 이 보드가 subrack에 실장되었을 때 진동 특성을 연구하였으며, subrack이 rack에 실장되는 조건을 갖는 진동 시험용 jig를 제작하여 보드와 subrack을 실장한 후 강제 진동시의 진동 전달 특성을 알아보았다. 본 연구의 결과는 내진동 특성이 우수한 전자통신 시스템 설계와 CDMA 이동통신 시스템의 HINA subrack 구조설계와 같은 개발장비 환경시험의 기초 자료로 활용될 수 있을 것이다.

• Journal of the Korean Applied Science and Technology
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• v.37 no.4
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• pp.755-761
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• 2020

The purpose of this study was to investigate the effects of balance board and whole-body vibration stimulator application on body muscle activities during static squat motion. Twenty adult males(age, 21.90±0.36 years; height, 174.30±1.09 cm; body mass, 66.50±1.00 kg; and BMI, 21.90±0.31 kg/㎡) were participated in this study as subjects. Three types' static squat motions were performed(basic static squat motion, BSSM; static squat motion with balance board, SSBB; static squat motion with whole-body vibration stimulator, SSVS). We measured the right side's body muscle activities of the rectus abdominis(RA), internal oblique(IO), external oblique(EO), rectus femoris(RF), vastus lateralis(VL), and vastus medialis(VM). The research findings were as follows. There was a significant higher RA, IO, and EO muscle activity of SSBB and SSVS(p=.001, p=.004, p=.000). And RF, VL, and VM muscle activities were greatest during SSVS(p=.000). These findings are expected to serve as references for static squat motion applications in training programs for body muscle strengthening.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1996.04a
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• pp.351-355
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• 1996

유연한 보의 진동문제에 대해 Filtered-X LMS 알고리즘을 이용하여 제어계를 구성하고 디지탈 신호처리보드를 이용하 여 실시간 제어를 수행하였다. 제어 엑추에이터로는 피에조 세라믹을 사용하였고 정현파 및 백색잡음 형태의 외력으 로 Shaker를 이용하여 보를 가진하였다. 백색잡음가진 실험결과 1차 고유진동수에서 14dB의 진동저감을 할 수 있었 으며 관심 주파수영역내에서진동이 고르게 저감되었다.

• 한국HCI학회:학술대회논문집
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• 2008.02a
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• pp.553-558
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• 2008

In this paper, we develop a vibration system which can generate diverse vibration effects in realtime by analyzing signals from the sound output of PC. This system is able to detect the occurrences of particular sounds in order to generate corresponding pre-programmed vibration patterns. It contributes to the improvement of the reality and the immersiveness of games and virtual reality applications. In addition, its advantage is to easily add vibration features to applications which were originally developed without consideration for vibration. Our system consists of an external DSP board for signal processing and a vibration pad which can be put on wrists. It is superior to other sound-driven vibration devices because its DSP board can detect more diverse sounds, has higher performance and does not interfere with PC. Also the wrist-wearable vibration pad is able to generate more realistic vibration than other mouse or joystick type devices.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1994.10a
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• pp.402-407
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• 1994

유연한 구조물의 진동문제에 대해 Filtered-X LMS 알고리즘을 이용한 제어계를 구성하고 디지탈 신호처리보드를 이용하여 실시간 제어를 수행하였다. 엑추에이터는 피에조 세라믹을 사용하였고 정현파 및 잡색잡음 가진 형태의 외란을 가하였다. 실험결과 1차 고유주파수에서 7dB 이상의 진동저감을 할 수 있었으며 관심 주파수영역 내에서 진동이 고르게 저감되었다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2012.04a
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• pp.793-794
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• 2012

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2012.04a
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• pp.899-900
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• 2012

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2010.05a
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• pp.90-91
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• 2010

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2010.05a
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• pp.584-585
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• 2010

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2013.10a
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• pp.807-808
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• 2013