한국군사과학기술학회지 (Journal of the Korea Institute of Military Science and Technology)

  • 제28권5호
  • /
  • Pages.545-552
  • /
  • 2025
  • /
  • 1598-9127(pISSN)
  • /
  • 2636-0640(eISSN)
한국군사과학기술학회 (The Korea Institute of Military Science and Technology)
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온도 변화에 따른 김발-서보 시스템 성능 변화 분석

Performance Analysis of Gimbal-Servo System Based on Temperature Variation

  • 정재헌 (국방과학연구소 제2기술연구원)
  • Jaeheon Jeong (2nd R&D Institute, Agency for Defense Development)
  • 투고 : 2025.03.19
  • 심사 : 2025.08.17
  • 발행 : 2025.10.05
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초록

This paper investigates the effect of temperature variation on the performance of a gimbal-servo system. The friction torque of the system was characterized through hysteresis loop measurements under different temperature conditions. Additionally, frequency response analysis was conducted, focusing on key results such as peak gain, gain margin, and phase margin. Experimental findings indicate that the Coulomb friction torque increases as the temperature decreases. Moreover, in the frequency response analysis, a rise in the damping coefficient was observed in the low-frequency region at lower temperatures, whereas the high-frequency region exhibited minimal temperature-dependent variation. To explain this behavior, this study models the Coulomb friction torque using an equivalent viscous damping coefficient that is inversely proportional to frequency.

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과제정보

이 논문은 2024년 정부(방위사업청)의 재원으로 수행된 연구임.

참고문헌

  1. D. Y. Kim and J. H. Jin, "Comparison of 2-axis Gimbal stabilization performance by control method," KIMST Annual Conference Proceedings, pp. 1829-1830, 2024.
  2. M. Y. Yoon and J. H. Jeong, "A study for applying MEMS gyroscope to small radar sensor 2-axis gimbal," KIMST Annual Conference Proceedings, p. 1120, 2023.
  3. S. M. Yeo and M. S. Kang, "A Simulation Experimental Disturbances Identification of Gyro Stabilized 2-Axes Gimbal System for Disturbance Freedforward Compensation Control," Journal of the Korea Institute of Military Science and Technology, Vol. 21, No. 4, pp. 508-519, 2018 DOI: 10.9766/KIMST.2018.21.4.508
  4. H. J. Lee, "Study on the Estimation of Friction Coefficient and Speed Control Characteristics of a Sight Stabilization System in Ambient and Low-temperature Environments," Proceedings of the Korean Society for Precision Engineering Conference, pp. 326-327, 2024.
  5. K. S. Kim, "Friction Parameters Estimation of the Line-of-Sight Stabilization System on Temperature Variation," Journal of the Korean Society for Precision Engineering Conference, Vol. 36, No. 6, pp. 543-548, 2019 DOI: 10.7736/KSPE.2019.36.6.543
  6. S. J. Young and M. K. Won, "Equivalent Viscous Damping Ratio of a Friction Damper Installed in a SDOF Building," Journal of Computational Structural Engineering Institute of Korea, Vol. 23, No. 2, pp. 199-208, 2010.