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Rack Force Estimation Method using a Tire Mesh Model

TIRE MESH 모델을 활용한 랙추력 추정법 개발

  • Kim, Minjun (Suspension & Steering Research Lab., Research & Development Division, Hyundai Motor Company) ;
  • Chang, Sehyun (Suspension & Steering Research Lab., Research & Development Division, Hyundai Motor Company) ;
  • Lee, Byungrim (Suspension & Steering Research Lab., Research & Development Division, Hyundai Motor Company) ;
  • Park, Youngdae (Suspension & Steering Research Lab., Research & Development Division, Hyundai Motor Company) ;
  • Cho, Hyunseok (Suspension & Steering Research Lab., Research & Development Division, Hyundai Motor Company)
  • 김민준 (현대자동차 연구개발본부 현가조향리서치랩) ;
  • 장세현 (현대자동차 연구개발본부 현가조향리서치랩) ;
  • 이병림 (현대자동차 연구개발본부 현가조향리서치랩) ;
  • 박영대 (현대자동차 연구개발본부 현가조향리서치랩) ;
  • 조현석 (현대자동차 연구개발본부 현가조향리서치랩)
  • Received : 2013.10.31
  • Accepted : 2014.03.06
  • Published : 2014.04.01

Abstract

In this paper, a new estimation method is proposed to calculate steering rack axial force using a 3 dimensional tire mesh model when a car is standing on the road. This model is established by considering changes of camber angle and contact patch between the tires and the ground according to steering angle. The steering rack bar axial force is estimated based on the static equilibrium equations of forces and moments. A tire friction force is supposed to act on the center point of the contact patch, and the proportional coefficient of friction depending on contact patch is suggested. Using the proposed estimation method, rack axial force sensitivity analysis is evaluated according to changes of suspension geometry. Then optimal motor power of Motor Driven Power Steering(MDPS) is evaluated using suggested rack forces.

Keywords

References

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Cited by

  1. Sensitivity Analysis of Steering Wheel Return-ability at Low Speed vol.25, pp.2, 2017, https://doi.org/10.7467/KSAE.2017.25.2.167