• Title/Summary/Keyword: Self-aligning Torque

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Development of Roadway-Departure Prevention System and HiLS (차선이탈방지 알고리듬 및 HiLS 개발)

  • 장승호;최두진;고정완;김상우;박부견
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.216-216
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    • 2000
  • In this paper, we introduce a new roadway-departure prevention algorithm and the developed Hardware-in-the-Loop-Simulator (HiLS) for applying the new algorithm. A sliding-mode controller is used for lateral position control. And, the HiLS consists of real car elements, a micro-control board, and a self-aligning torque generator Finally from the display module, the perspective view and bird view of the animated vehicle can be seen simultaneously.

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Coasting and Post-impact Motion of a Vehicle With Tire Blowout (타이어 펑크 차량의 주행 및 충돌후 거동)

  • Han, Inhwan;Lim, Sanghyun;Park, Jong-Chan;Choi, Jihun
    • Journal of Korean Society of Transportation
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    • v.32 no.5
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    • pp.503-512
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    • 2014
  • In this paper, various tire blow-out force experiment data were collected and analyzed to obtain approximate values of related coefficients such as rolling resistance, self-aligning torque, cornering stiffness, and radial stiffness for the analysis of the motion of vehicles with tire blow-outs. These coefficients related to tire blow-outs were input into a vehicle accident analysis program to simulate and examine the effects of tire blow-outs. Various configurations and velocities of vehicle collisions without tire blow-outs were also used as reference to establish collision events of vehicle collisions with tire blow-outs. For the events, the simulation analysis was performed and collision characteristics were obtained. Consideration of tire blow-outs or damages suggested in this study will greatly contribute to more reliable vehicle accident reconstructions.

Development of a Low-Cost Steering System Simulator

  • Lee, You-Yub;Joe, Yong-Goo;Oh, Jae-Eung;Hahn, Chang-Su;Shin, Ki-hong
    • Journal of Mechanical Science and Technology
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    • v.17 no.9
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    • pp.1261-1267
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    • 2003
  • The Steering system is the most important system for a vehicle, in terms of safety and driving feel. But in many cases, experiments to improve the steering feel using a real vehicle are very difficult in the aspects of repeatability, safety and money. Repeatability in testing steering systems is very important because the steering feel for a driver varies according to the environmental conditions. In addition to that, steering tests using vehicle are so dangerous that the driver might not concentrate on the tests. In this paper, a new steering system simulator using the front part of a steering and suspension system is described. This simulator allows cheap, safe, and repeatable testing of the steering system compared with the real vehicle test.

Development of Simulator for Performance Test of Electric Power Steering of Light Weight Vehicle (경차용 전동조향장치의 성능평가를 위한 시뮬레이터의 개발)

  • Hahn, Chang-Su;Rhee, Meung-Ho;Park, Ho;Oh, Jae-Eung
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.25 no.6
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    • pp.923-929
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    • 2001
  • Steering system is most important for vehicle in safety and driving feel. However, testing using real car to improve steering feel is often difficult in aspect to repeatability, safety and money. Repeatability in testing steering system is very important because steering feel for driver is variable according to the environment condition. And steering testing of vehicle is so dangerous that driver may not concentrate in testing. In this paper, the steering system simulator using front part of steering and suspension system was developed. We can test the electric power steering system for the light weight vehicle using this simulator cheap, safely and repeatably.

A Study on Lateral Tire-road Friction Coefficient Estimation Using Tire Pneumatic Trail Information (타이어 뉴메틱 트레일 정보를 활용한 횡방향 타이어 노면 마찰 계수에 관한 연구)

  • Han, Kyoungseok;Choi, Seibum
    • Transactions of the Korean Society of Automotive Engineers
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    • v.24 no.3
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    • pp.310-318
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    • 2016
  • The demands for vehicle safety systems such as ABS and ESC have been increased. Accurate vehicle state estimation is required to realized the abovementioned systems and tire-friction coefficient is crucial information. Estimation of lateral tire-road friction coefficient using pneumatic trail information is mainly dealt in this paper. Pneumatic trail shows unique characteristics according to the wheel side slip angle and these property is highly sensitive to vehicle lateral motion. The proposed algorithm minimizes the use of conventional tire models such as magic formula, brushed tire model and Dugoff tire model. The pure side slip maneuver, which means no longitudinal dynamics, is assumed to achieve the ultimate goal of this paper. A simulation verification using Carsim and Simulink is performed and the results show the feasibility of the proposed algorithms.

Analysis of Limitation and Improvement of Degree of Freedom for Brush Tire Model (브러쉬 타이어 모델의 한계점 분석 및 자유도 개선)

  • Kim, Jong-Min;Jung, Samuel;Yoo, Wan-Suk
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.41 no.7
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    • pp.585-590
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    • 2017
  • Vehicle behavior is determined by forces and a torques generated at the ground contact surface of the tire. Various tire models are used to calculate the forces and torques acting on the tire. The brush model calculates the forces and torques with fewer coefficients than other tire models. However, owing to fewer degrees of freedom in calculating the forces, this model has limitations in precisely expressing measured data. In this study, this problem was addressed by adding the least parameters to the friction coefficient and tire properties of the brush model, and the proposed model was validated.