• Proceedings of the Korean Nuclear Society Conference
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• 한국원자력학회 1998년도 추계학술발표회요약집
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• pp.181-181
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• 1998

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 한국에너지공학회 1998년도 추계 학술발표회 논문집
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• pp.222-227
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• 1998

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 한국에너지공학회 2004년도 춘계 학술발표회 논문집
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• pp.335-339
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• 2004

• Proceedings of the Korean Nuclear Society Conference
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• 한국원자력학회 2001년도 추계학술발표회요약집
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• pp.298.1-298
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• 2001

• Proceedings of the Korean Nuclear Society Conference
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• 한국원자력학회 2004년도 요약집 춘계학술발표대회
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• pp.266.2-266.2
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• 2004

• Proceedings of the Korean Radioactive Waste Society Conference
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• 한국방사성폐기물학회 2017년도 추계학술논문요약집
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• pp.99-100
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• 2017

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 한국소음진동공학회 2004년도 추계학술대회논문집
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• pp.311-316
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• 2004

For the location estimation in the conventional LPMS(Loose Parts Monitoring System), it is popular to employ a group delay among the acoustic sensors installed within a 3 ft range from the impact source. However, there exists inherent error in determining the arrival time differences of the generated wave group among the neighboring sensors. To overcome this problem in this study, the two dimensional approach has been proposed and applied to effectively estimate the arrival time differences by using a continuous wavelet transform which is one of the linear time-frequency analysis methods. The experiment has been performed to both the plate model and the real steam generator in a nuclear power plant. It is expected that the reliability of the location estimation could be enhanced when the proposed time-frequency method is introduced into the LPMS system.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 한국방사성폐기물학회 2017년도 춘계학술논문요약집
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• pp.299-300
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• 2017

• Journal of Power Electronics
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• 제15권5호
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• pp.1256-1263
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• 2015

A novel vector control strategy for a permanent magnet synchronous motor (PMSM) based on the kinetic energy stored in the rotor is proposed in this paper. The novel strategy is composed of two closed loops, in which the current loop is the inner loop, and the kinetic energy serves as the outer loop. The theoretical basis and the design procedure of the two loops are given. The feasibility of the proposed control strategy is verified by experimental results. When compared with traditional vector control strategies, the proposed vector control strategy based on energy feedback has better dynamic performance. In addition, an effective estimation solution for the load variation is put forward.

• Journal of Environmental Science International
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• 제18권8호
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• pp.885-897
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• 2009

In order to make sure the impact of spatial resolution of wind energy map on the estimation of wind power density in the Korean Peninsula, the comparison studies on the characteristics of wind energy map with three different spatial resolutions were carried out. Numerical model used in the establishment of wind map is MM5 (5th generation Mesoscale Model) with RBAPS (Regional Data Assimilation and Prediction System) as initial and boundary data. Analyzed Period are four months (March, August, October, and December), which are representative of four seasons. Since high spatial resolution of wind map make the undulation of topography be clear, wind pattern in high resolution wind map is correspond well with topography pattern and maximum value of wind speed is also increase. Indication of island and mountains in wind energy map depends on the its spatial resolution, so wind patterns in Heuksan island and Jiri mountains are clearly different in high and low resolutions. And area averaged power density can be changed by estimation method of wind speed for unit area in the numerical model and by treatment of air density. Therefore the studiable resolution for the topography should be evaluated and set before the estimation of wind resources in the Korean Peninsula.