Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on Suspension Optimization of the Korean Personal Rapid Transit Vehicle

한국형 PRT차량의 현가장치 최적화 연구

  • Kim, Hyun Tae (Dept. of Rolling Stock System, Seoul Nat'l Univ. of Science and Technology) ;
  • Kim, Jun Woo (Dept. of Rolling Stock System, Seoul Nat'l Univ. of Science and Technology) ;
  • Cho, Jeong Gil (Dept. of Rolling Stock System, Seoul Nat'l Univ. of Science and Technology) ;
  • Koo, Jeong Seo (Dept. of Rolling Stock System, Seoul Nat'l Univ. of Science and Technology) ;
  • Kang, Seokwon (On-Demand Transit Research Team, Korea Railroad Research Institute) ;
  • Jeong, Raggyo (On-Demand Transit Research Team, Korea Railroad Research Institute)
  • 김현태 (서울과학기술대학교 철도전문대학원 철도차량시스템공학과) ;
  • 김준우 (서울과학기술대학교 철도전문대학원 철도차량시스템공학과) ;
  • 조정길 (서울과학기술대학교 철도전문대학원 철도차량시스템공학과) ;
  • 구정서 (서울과학기술대학교 철도전문대학원 철도차량시스템공학과) ;
  • 강석원 (한국철도기술연구원 수요응답형교통연구단TFT) ;
  • 정락교 (한국철도기술연구원 수요응답형교통연구단TFT)
  • Received : 2015.08.18
  • Accepted : 2016.01.18
  • Published : 2016.03.01
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Abstract

In this study, running stability and ride quality analyses, applying the 'ISO 3888 (double lane change)' and 'ISO 2631-1' (mechanical vibration and shock) tests, were performed for the suspension optimization of the Korean personal rapid transit (PRT) vehicle. The suspension optimization results for running stability and ride quality were derived by applying the multiresponse surface method. From the comparisons of the optimization results for different ratios of the objective functions of running stability and ride quality, we derived the best objective function ratio of 3.9-to-6.1 to improve both the running stability and the ride quality. With the optimized results, the suspension stiffness became 30.68 N/mm, between the value of the $S_2$ and $S_3$ models, and the damping coefficient equaled that of the $D_1$ model. When compared with the suspension of the current PRT vehicle, the roll angle, yaw rate, sideslip angle, and ride comfort were improved by 0.37, 0.37, 2.8, and 5, respectively.

본 연구에서는 한국형 PRT차량의 주행안정성 및 승차감 향상을 위해 현가장치 최적화를 진행하였다. ISO 3888(Double Lane Change Test)를 통하여 주행안정성을 분석하고 ISO 2631-1을 이용하여 승차감 분석을 진행하였다. 이를 통해 주행안정성과 승차감에 대하여 다중반응표면법을 적용하여 현가장치 최적화를 진행하였다. 그 결과 모든 반응함수가 초기설계치보다 모두 개선되는 만족함수의 비율은 3.9 : 6.1이며, 이때 현가장치의 특성은 Stiffness의 경우 S2와 S3 model의 사이 값인 30.68 N/mm과 Damping 계수의 경우 D1 model의 값을 갖는다. 초기설계인 현재 PRT차량의 현가장치와 비교했을 때, 최적화된 PRT 현가장치 설계는 Roll angle와 Yaw rate는 0.37%, Side slip angle은 2.8%, Ride comfort는 5% 향상된다.

Keywords

References

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