한국형 PRT차량의 현가장치 최적화 연구

국문 초록 (Abstract)

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 Damping계수의 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.

다국어 초록 (Multilingual 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 S2 and S3 models, and the damping coefficient equaled that of the D1 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.

목차 (Table of Contents)

• 초록
• Abstract
• 1. 서론
• 2. PRT차량의 제원 및 동역학 모델
• 3. PRT차량의 주행안정성 분석
• 4. PRT차량의 승차감 분석
• 5. 반응표면법을 이용한 현가장치 최적화
• 6. 결론
• 참고문헌(References)

참고문헌 (Reference)

1 조정길, "한국형 소형궤도차량(PRT)의 내구성 및 주행안정성 평가 연구" 한국자동차공학회 22 (22): 50-58, 2014

2 조정길, "소형궤도차량(PRT) 차체의 설계사양 도출 및 구조강도 평가 연구" 한국자동차공학회 21 (21): 144-152, 2013

3 Grip, H. F., "Vehicle Sideslip Estimation Design, Implementation, and Experimental validation" 2009

4 LMS, "Tecware REV 3.10"

5 Kim, J. W., "Study on the Specifications and Design of the Korean PRT Vehicle" 133-138, 2013

6 Wu, S., "Special Analytical Target Cascading for Handling Performance and Ride Quality Based on Conceptual Suspension Model and Multi-body Model" SAE International 2009

7 Origin Lab Corporation, "Origin Pro 9.1"

8 Eskandari, A., "Optimization of a McPherson Suspension System Using the Design of Experiments Method" SAE International 2006

9 Kim, S. K., "Optimization of Rear Link Component of Automobile for Lightweight" 100-102, 2009

10 Park, S. H., "Modern Design of Experiments" Minyoungsa 521-572, 1998

11 Minitab Inc, "Minitab 17"

12 "ISO 8608: Mechanical Vibration – Road Surface Profiles"

13 "ISO 3888-1, Passenger cars - Test Track for a Severe Lane-change Maneuver-Part 1: Double Lanechange"

14 "ISO 2631-1: Mechanical Vibration and Shockevaluation of Human Exposure to Whole-body Vibration"

15 Mechanical simulation, "CarSim User manual Version 8"

16 Cho, I. S., "An Engineering Design, Implementation and Test of a Prototype Vehicle for Realization of Korean Mini-Tram (PRT)" 98-103, 2015

17 Kang, S. K., "An Engineering Design of the PRT Vehicle Architecture Suitable as On-demand Transit System in Korea" 2119-2123, 2013

18 MSC Software, "Adams/car User Manual"

19 Legal, d. F. L., "A Case Study on the Response Surface Method Applied to the Optimization of the Dynamical Behavior of Vehicles" SAE International 2006