• Title/Summary/Keyword: Young-Hoon Kim

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Development of High Speed Rotor Balancing Machine (고속회전체 밸런싱 시험기 개발)

  • Lee, Young-Seob;Lee, Jeong-Hoon;Kim, Chang-Geun;Kim, Myung-Seop
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2000.06a
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    • pp.1078-1083
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    • 2000

  • A high speed rotor balancing machine was developed, which is capable of balancing a flexible rotor in high speed. The machine is largely consisted of vacuum chamber, oil supply system and vacuum pump system. And, in order to investigate performances of the machine, various tests were carried. After high speed rotor balancing of gas turbine engine rotor using influence coefficient method, the flexible engine rotor passed smoothly through its critical speed.

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Conductance Difference of Single Molecular Junctions between Experiments and Computational Simulations

  • Choi, Ji Il;Kim, Hu Sung;Kim, Young-Hoon
    • Proceedings of the Korean Vacuum Society Conference
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    • 2014.02a
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    • pp.184.2-184.2
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    • 2014

  • Recent advances in the synthesis and characterization of nanoscale objects provided us with the atomistic understanding of charge transport through single molecular junctions. The representative examples are the mechanically controlled break junction technique and STM or conducting AFM junction techniques. Theoretical studies have been reported on the dependence of electronic charge transport on the geometry of molecule-electrode contacts, the critical element toward the realization of molecular electronics. In this report, we will clarify the puzzling discrepancies between theoretical predictions and experiments.

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A Study on the Tuning method of PSS Control Parameters (실계통 PSS 정수 튜닝기법에 관한 연구)

  • Shin, Jeong-Hoon;Kim, Tae-Kyun;Yoon, Yong-Beum;Kim, Dong-Joon;Moon, Young-Hwan
    • Proceedings of the KIEE Conference
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    • 1999.11b
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    • pp.251-254
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    • 1999

  • This paper presents the basic tuning method for PSS control parameters. This method includes the phase compensation and root-locus based gain tuning for one machine with infinite bus system. At the tuning condition and least stable condition, the effect of gain tuning is also discussed.

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