Journal of Drive and Control (드라이브 ㆍ 컨트롤)

The Korean Society for Fluid Power and Construction Equipment (유공압건설기계학회)
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Numerical Analysis of Steering Instability of 55kW Eletric Tractor by Bouncing and Sliding

Bouncing과 Sliding에 의한 55 kW급 전기 트랙터의 조향 불안정성 수치해석

  • Yeong Su Kim (Department of Agricultural Engineering, National Institute of Agricultural Sciences) ;
  • Jin Ho Son (Department of Bio Industrial Machinery Engineering, Kyungpook National University) ;
  • Yu Jin Han (Department of Bio Industrial Machinery Engineering, Kyungpook National University) ;
  • Seok Ho Kang (Department of Bio Industrial Machinery Engineering, Kyungpook National University) ;
  • Hyung Gyu Park (Department of Bio Industrial Machinery Engineering, Kyungpook National University) ;
  • Yong Gik Kim (Department of Bio Industrial Machinery Engineering, Kyungpook National University) ;
  • Seung Min Woo (Department of Bio Industrial Machinery Engineering, Kyungpook National University) ;
  • Yu Shin Ha (Department of Bio Industrial Machinery Engineering, Kyungpook National University)
  • Received : 2024.08.21
  • Accepted : 2024.08.28
  • Published : 2024.09.01
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Abstract

Tractors are used for farming in harsh terrain such as slopes with slippery fields and steep passages. In these potentially dangerous terrain, steering instability caused by bouncing and sliding can lead to tractor rollover accidents. The center of gravity changes as parts such as engines and transmissions used in existing internal combustion engine tractors are replaced by motors and batteries, and the risk of conduction must be newly considered accordingly. The purpose of this study was to derive the center of gravity of a 55 kW class electric tractor using an electric platform from an existing internal combustion engine tractor, and to numerically investigate the tractor steering instability due to bouncing and sliding. The analysis provides a strong analysis by integrating an elaborate combination of a bouncing model and a sliding model based on Coulomb's theory of friction. Various parameters such as tractor speed, static coefficient of friction, bump length and radius of rotation are carefully analyzed through a series of detailed designs. In particular, the simulation results show that the cornering force is significantly reduced, resulting in unintended trajectory deviations. By considering such complexity, this study aims to secure optimal performance and safety in the challenging terrain within the agricultural landscape by providing valuable insights to improve tractor safety measures.

Keywords

Acknowledgement

이 연구는 2024년도 산업통상자원부 및 산업기술평가관리원(KEIT) 연구비 지원에 의한 연구임(20023098).

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