• Title/Summary/Keyword: Engineering M&S

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Observation Performance Analysis of the Telescope System according to the Offset Compensation Cycle (옵셋 보정 주기에 따른 망원경 시스템 관측 성능 분석)

  • Lee, Hojin;Hyun, Chul;Lee, Sangwook
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.24 no.1
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    • pp.15-21
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    • 2020

  • In this paper, the observation performance of the electro-optical telescope system which surveils the unknown space objects, is analyzed by the Modeling & Simulation(M&S). The operation concept for the observation of the unknown space objects using two telescope systems is considered and the M&S models are constructed. Based on the operation concept for observing the unknown space objects, the estimated orbit is generated by Initial Orbit Determination(IOD) and the observation performance is analyzed according to the offset compensation cycle for the estimated orbit. The result of the M&S based analysis in this paper shows that the observation performance increases with the shorter offset compensation cycle, and decreases with the longer offset compensation cycle. Therefore, to improve the performance of the telescope system which surveils the unknown space objects, the observation system with accurate initial orbit determination or shorter offset compensation cycle should be designed and constructed.

  • https://doi.org/10.6109/jkiice.2020.24.1.15 인용 PDF KSCI

Modeling and Vector Control of HA-PMLSM using film-coil (필름코일을 이용한 HA-PMLSM의 모델링 및 벡터제어)

  • Jang, S.M.;Chang, K.W.;Lee, S.H.;Jeong, S.S.;Jin, S.G.;Yoon, I.K.
    • Proceedings of the KIEE Conference
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    • 2001.10a
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    • pp.39-41
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    • 2001

  • This paper deals with a simulation and a position control for linear synchronous motor with Halbach array (HA) permanent magnet mover. We derived decouple the forces (thrust, normal force) by magnetic field modeling of the electromagnetic field analysis. The results of control simulation for HA-PM having air-core primary are calculated using M Simulink.

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Removal of VOCs and H2S from Waste Gas with Biotrickling Filter (생물살수여과법을 이용한 공기중 VOC 및 H2S 제거)

  • Kim, Kyoung-Ok;Kim, Yong-Je;Won, Yang-Soo
    • Applied Chemistry for Engineering
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    • v.19 no.5
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    • pp.519-525
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    • 2008

  • Biodegradation of toluene, styrene and hydrogen sulfide as model compounds of volatile organic compounds and odor from waste gas was investigated experimentally in a biotrickling filter. This study focussed on the description of experimental results with regard to operating conditions. The effect of varying $H_2S$ load rate and inlet concentration was investigated under autotropic and mixotropic environmental conditions. The $H_2S$ removal efficiencies of greater than 99% were achieved at $H_2S$ loads below $10g/m^3{\cdot}hr$ for each environment. It was observed that the maximum elimination capacity of mixotrophic filter was achieved a little greater than the one of autotrophic filter. The biofiltration of toluene and styrene in trickling bed was examined under different gas flow rates, load rates, and inlet concentrations. Below $40g/m^3{\cdot}hr$ of toluene loading, the elimination capacity and loading were identical and it was completely destroyed. In high loading of toluene, the biotrickling filter was operated at its maximum elimination capacity. In the inlet concentration of 0.2, 0.5, and $1.0g/m^3$, the maximum elimination capacity of toluene showed 40, 45, and $60g/m^3{\cdot}hr$, respectively. After a short adaptation period, it was demonstrated that the results of styrene in originally toluene adapted bioreactor was similar with the ones of toluene. However, the performance of filer for styrene is generally a little lower than for toluene. The operating conditions (including liquid flow rate etc.) allowing the highest removal efficiency should be determined experimentally for each specific case.

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