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Research Paper

Multi-Body Dynamics Modeling and Sensitivity Analysis of the Military Launcher Elevation Drive System

군용 발사대 고각 구동 시스템의 다물체 동역학 모델링 및 민감도 분석

Yong-Jae Lee1
,
Jin-Ho Kim2
,
Ho-Jong Choi3
,
Yeong-Hoon Seong4
,
San Kim5*
이 용재1
,
김 진호2
,
최 호종3
,
성 영훈4
,
김 산5*
1Graduate Student, Department of Mechanical Convergence Engineering, Gyeongsang National University, Changwon, 51391, Korea
2B.S., Department of Mechanical Convergence Engineering, Gyeongsang National University, Changwon, 51391, Korea
3Chief Researcher, Senior Researcher, Young Poong Electronics Co., Ltd., Changwon, 51390, Korea
4Principal Researcher, Senior Researcher, Young Poong Electronics Co., Ltd., Changwon, 51390, Korea
5Associate Professor, Department of Mechanical Convergence Engineering and Gyeongnam Aerospace & Defense Institute of Science and Technology, Gyeongsang National University, Jinju, 52828, Korea
1경상국립대학교 기계융합공학과 석사과정
2경상국립대학교 기계융합공학과 학사
3영풍전자(주) 기계기술팀 수석연구원
4영풍전자(주) 기계기술팀 책임연구원
5경상국립대학교 기계융합공학과, 경남우주항공방산과학기술원 부교수
*Corresponding Author
30 June 2026. pp. 169-178
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Abstract

The military launcher system operates within weight and power consumption constraints, necessitating efficient drive component design and energy usage. However, prototype fabrication and repeated experiments to reflect design changes are inefficient in terms of time and cost, necessitating the development of an analysis model capable of representing actual system behavior. This study used ANSYS Motion to develop a multibody dynamics (MBD) model of a launcher’s elevation drive mechanism. The model incorporated reducer-based power transmission characteristics and an experimentally calibrated equivalent loss torque. The simulation results were compared to experimental measurements to determine model reliability. The results showed that the angular displacement of the POD was accurately reproduced, and the required motor torque exhibited trends generally consistent with the experimental results. In addition, sensitivity analysis using a two-level full factorial design was used to evaluate the effects of major design variables on the required motor torque. The results provide useful reference data for the preliminary design of launcher elevation drive units and similar reducer-based drive systems.

Keywords
military launcher
elevation drive
reducer-based system
motor torque prediction
multi-body dynamics
sensitivity analysis

군용 발사대 시스템은 무게와 전력 소비 제한 조건 하에서 운용되므로 구동 장치의 질량과 에너지 사용량을 고려한 효율적 설계가 요구된다. 본 연구에서는 ANSYS Motion을 이용하여 발사대 고각 구동 메커니즘의 다물체 동역학 모델을 구축하고, 감속기 기반 동력 전달 특성과 실험 데이터 기반 등가 손실 성분으로 보정하였다. 시뮬레이션과 실험 결과를 비교한 결과, POD 각변위와 모터 요구 토크는 전반적으로 유사한 경향을 보였다. 또한 2수준 완전 요인 설계법을 적용해 주요 설계 변수가 모터 요구 토크에 미치는 영향을 평가하였다.

키워드
군용 발사대
고각 구동
감속기 기반 시스템
모터 토크 예측
다물체 동역학
민감도 분석
References
1

Hamby, D.M. (1994) A Review of Techniques for Parameter Sensitivity Analysis of Environmental Models, Environ. Monit. & Assess., 32(2), pp.135~154.

10.1007/BF00547132
2

Hwang, H.Y., Jang, S.H., Jung, W.Y., Choi, Y.H. (2009) A Study on Vibration Analysis of an Elevation Mechanism for GWLS, Trans. Korean Soc. Mach. Tool Eng., pp.159~164.

3

Kim, D.B., Kim, H.S. (2023) Development and Technological Strategy of Intelligent Ground Manned-Unmanned Composite Combat Systems: Focused on Future Ground Combat Systems, J. Korean Assoc. Def. Indus. Stud., 30(2), pp.59~67.

10.52798/KADIS.2023.30.3.5
4

Kim, H.W., Yoo, W.S. (2013) MBD Applications in Design, Int. J. Non-Linear Mech., 53, pp.55~62.

10.1016/j.ijnonlinmec.2012.10.008
5

Kim, J.Y., Kim, J.G. (2014) Multi-Flexible Dynamic Modeling and Wheel Load Analysis of a Rubber Tired Gantry Crane in Container Cargo Working, J. Comput. Struct. Eng. Inst. Korea, 27(5), pp.379~384.

10.7734/COSEIK.2014.27.5.379
6

Kim, S.D. (2024) Warrior Platform: Core Capabilities, Challenges and Development Directions, J. Future Soc., 15(3), pp.122~133.

7

Mays, D.P., Myers, R.H. (1997) Design and Analysis for a Two-Level Factorial Experiment in the Presence of Variance Heterogeneity, Comput. Stat. & Data Anal., 26(2), pp.219~233.

10.1016/S0167-9473(97)00028-5
8

Michaelis, K., Höhn, B.R., Hinterstoißer, M. (2011) Influence Factors on Gearbox Power Loss, Ind. Lubr. & Tribol., 63(1), pp.46~55.

10.1108/00368791111101830
9

Park, I. H., Jeon, Y. J., Go, A. R., Seol, S. S., Hong, D. S. (2020) Dynamic Analysis to Select Main Parts of Four-Axis Palletizing Robots, J. Korean Soc. Manuf. Proc. Eng., 19(12), pp.62~69.

10.14775/ksmpe.2020.19.12.062
10

Song, I., Ryu, H., Choi, J. (2015) The Efficient Dynamic Modeling of a Manipulator Robot System, Trans. KSME C Indus. Technol. & Innov., 3(2), pp.155~164.

10.3795/KSME-C.2015.3.2.155
11

Thompson, B.J. (2019) Influence of Signal Filtering and Sample Rate on Isometric Torque - Time Parameters using a Traditional Isokinetic Dynamometer, J. Biomech., 83, pp.235~242.

10.1016/j.jbiomech.2018.12.006
12

Voss, W. (2007) A Comprehensible Guide to Servo Motor Sizing, Copperhill Media, p.140.

Information
  • Publisher :Computational Structural Engineering Institute of Korea
  • Publisher(Ko) :한국전산구조공학회
  • Journal Title :Journal of the Computational Structural Engineering Institute of Korea
  • Journal Title(Ko) :한국전산구조공학회 논문집
  • Volume : 39
  • No :3
  • Pages :169-178
  • Received Date : 2026-04-21
  • Revised Date : 2026-05-12
  • Accepted Date : 2026-05-12
  • DOI :https://doi.org/10.7734/COSEIK.2026.39.3.169
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