Journal of Drive and Control (드라이브 ㆍ 컨트롤)

The Korean Society for Fluid Power and Construction Equipment (유공압건설기계학회)
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Validation of Actuator Gearbox Accelerated Test Method Using Multi-Body Dynamics Simulation

다물체 동역학 시뮬레이션을 이용한 작동기용 기어박스 가속시험법 검증

  • Donggun Lee (Department of Smart Industrial Machine Technologies, Korea Institute of Machinery and Materials) ;
  • Sanggon Moon (Department of Smart Industrial Machine Technologies, Korea Institute of Machinery and Materials) ;
  • Young-Jun Park (Department of Biosystems Engineering, Seoul National University) ;
  • Woo-Ram Shim (Electric Propulsion System Division, Hanwha aerospace) ;
  • Sung-Bo Shim (Bio-Industrial Machinery Engineering, Kyungpook National University) ;
  • Su-Chul Kim (Department of Smart Industrial Machine Technologies, Korea Institute of Machinery and Materials)
  • Received : 2023.12.07
  • Accepted : 2024.02.14
  • Published : 2024.03.01
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Abstract

Gearboxes designed for reciprocating motion operating mechanisms operate under conditions where both the load and speed undergo continuous variations. When conducting durability tests on gearboxes designed for such applications, operating the target gearbox under conditions similar to the intended usage is essential. The gearbox must be operated for the required number of cycles to validate its durability under conditions mirroring its intended usage. This study devised an accelerated test method for gearboxes, which reduces operating angles and operational strokes. The reliability of the accelerated test was verified by comparing the stresses imposed on the gears under general and acceleration conditions through multi-body dynamic simulations. The results confirmed that the maximum contact stress levels under normal and accelerated conditions were within a 0.1% error range, indicating a minimal difference in the gear damage rates. However, a difference in the maximum contact stress results between the normal and accelerated conditions was observed when inertial forces acted on the output shaft due to the operational acceleration of the gearbox. Therefore, when conducting this acceleration test, caution should be exercised to ensure that the operational load on the gearbox, which affects inertia, does not significantly deviate from the conditions observed under normal operating conditions.

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