Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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A Study on the optimal design of MOSCOS arrangement to solve the EMI between EWT and MOSCOS

전자전훈련지원체계와 해상작전위성통신체계 간 전자기 간섭 개선을 위한 최적배치에 대한 연구

  • Received : 2019.01.31
  • Accepted : 2019.04.05
  • Published : 2019.04.30
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Abstract

The optimum solutions of MOSCOS antenna arrangement were studied to solve the EMI between it and EWT mounted on an MTB. Two candidates of optimal place for MOSCOS antenna were determined by using a fishbone diagram to determine seven reasons based on 4M1E, to identify the design factors on Friis equations, and to analyze the case study of EMI related to MOSCOS. MOSCOS antenna was rearranged by the final optimal position, which was selected by measuring the Power Spectral Density (PSD) at two locations, and the proposed improvement was tested on board to determine its efficiency.

다목적훈련지원정(MTB)에 탑재되는 전자전훈련지원체계(EWT) 송신 신호에 의해 MOSCOS 간 전자기간섭 문제점을 해결하기 위한 안테나 최적 위치에 대한 연구를 수행하였다. 이를 위해 4M1E에 근거한 Fishbone Diagram을 이용하여 7가지의 원인을 식별하였으며 Friis 전달공식을 통해 고려해야 할 요소를 식별하고 기존 함정에서 발생한 유사 문제점을 분석한 후, 두 개의 최적 배치 후보를 선정하였다. 두 개의 설치 위치에 대해 전자기 수신 레벨을 측정하여 최적배치(안)을 수립한 후, 본 개선사항에 대한 실선 시험을 통해 전자기 간섭 개선 효과를 확인하였다.

Keywords

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Fig. 1. MOSCOS configuration

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Fig. 2. EWT Operating Concept

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Fig. 3. EMC determination flow diagram

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Fig. 4. Fishbone diagram of EMI

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Fig. 5. MOSCOS and EWT Antenna Placement

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Fig. 6. MOSCOS wave propagation model

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Fig. 7. EMI Characteristics on E1D mode

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Fig. 8. Top view of MOSCOS and EWT

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Fig. 9. The location of E-field for MOSCOS

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Fig. 10. The PSD of left-sided ANT. locationon E1C and E1D mode

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Fig. 11. The PSD of right-sided ANT. locationon E1C and E1D mode

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Fig. 12. Improvement of MOSCOS location

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Fig. 13. The final improvement of MOSCOS

Table 1. MOSCOS Specification

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Table 2. The candidates for optimal solution

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Table 3. The improvement of two candidates

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Table 4. The evaluation results of three candidates

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Table 5. The test results after improvement

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References

  1. Bag B. S., "First deployment of a navy MTB", The Hankyoreh news, Dec. 29, 2017.
  2. Seo Dae Soo et al, " Installation Plan Research Report for Underwater Telephone System of Naval Catamaran Vessel", DTaQ-18-5670-R, 2018.
  3. J. H. Lee, J. H. Kwon and K. H. Song, “Analysis of the Electric-field Characteristics of V/UHF Antennas Installed on a Shipboard,” Journal of the Korea Institute of Military Science and Technology, Vol. 11, No. 6, pp. 74-75, 2008.
  4. H. W. Park, H. S. Lee and W. S. Yoon, “Performance Analysis of Cooperative Communication with Spread Spectrum to Overcome Channel Blockage for On-The-Move Terminal in Next Generation Satellite Communication Systems,” Journal of Korea Information and Communications Society, Vol. 39, No. 9, pp. 757-758, 2014. DOI: https://doi.org/10.7840/kics.2014.39C.9.757
  5. J. S. Im, “Proceedings of the Korean Electromagnetic Engineering and Science,” Journal of Korea Institute of Electromagnetic Engineering and Science, Vol. 11, No. 4, pp. 53-63, 2000.
  6. D. J. Baek, "A study on the noise reduction of air conditioner cooling down EWT", Korea Navy Science & Technology Committee, 2018.
  7. Hoseong Chang, Younghoon Ham, Kwanjun Jo, "A study on EMI shield optimization for improvement of EMI between MIL-SATCOM and ES on a surface ship", Journal of the KIMST, Vol. 20, No. 1, pp. 63-71, 2017. DOI: https://doi.org/10.9766/KIMST.2017.20.1.063
  8. The Society of Naval Architects of Korea, "Naval Ship," Text Books, Korea, pp. 438-440, 2015.
  9. Y. J. Son, The Report for Optimum Location Selection of Aegis Destroyer MOSCOS, DTaQ-09-2054-R, 2009.
  10. Accept Tech., The EMI/EMC final report on MTB, 2017.
  11. Balanis, C. A., Antenna Theory, Wiely-Interscience, ISBN 9780471667827, 2005.
  12. Korean Society for Learning and Performance, HRD Terminology, ISBN 9788970172422, JoongAng Economics, 2010.
  13. Sergio Conceicao, "Ns-3 Simulation Model for Underground Networks," Faculdade de Engenharia da Universiade do Porto, pp. 10-11, 2014. DOI: https://paginas.fe.up.pt/-ee10010/style/images/dissertations/pdi.pdf
  14. Y. J. Son, The Report for Optimum Location Selection of Aegis Destroyer MOSCOS, DTaQ-09-2054-R, 2009
  15. H. Chang, Y. Son, "A Study on Optimal Deployment for Improvement of EMI between MOSCOS and ES DF Antenna on a Surface Ship", Journal of the KIMST, Vol. 20, No. 2, pp. 197-205, 2017. DOI: https://doi.org/10.9766/KIMST.2017.20.2.197
  16. William Mark Smith, "Urban Propagation Modeling for Wireless Systems," The Department of Electrical Engineering and the committee on Graduate Studies of Stanford University, pp. 12-15, 2004. DOI: http://apps.dtic.mil/dtic/tr/fulltext/u2/a424868.pdf