- Volume 23 Issue 5
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Ride Comfort Evaluation of Electronic Control Suspension Using a Magneto-rheological Damper
MR 댐퍼를 이용한 전자제어 현가장치의 승차감 평가
- Sung, Kum-Gil (School of Mechanical and Automotive Engineering, Yeungnam College of Seicence and Technology) ;
- Choi, Seung-Bok (Department of Mechanical Engineering, Inha University)
- Received : 2013.03.29
- Accepted : 2013.04.18
- Published : 2013.05.20
This paper presents design and control of electronic control suspension(ECS) equipped with controllable magnetorheological(MR) damper for passenger vehicle. In order to achieve this goal, a cylindrical type MR fluid damper that satisfies design specification of a middle-sized commercial passenger vehicle is proposed. After manufacturing the MR damper with design parameters, their field-dependent damping forces are experimentally evaluated and compared with those of a conventional damper. A quarter-vehicle MR ECS system consisting of sprung mass, spring, tire, controller and the MR damper is established in order to investigate the ride comfort performances. On the basis of the governing equation of motion of the suspension system, five control strategies(soft, hard, comfort, sport and optimal mode) are formulated. The proposed control strategies are then experimentally realized with the quarter-vehicle MR ECS system. Control performances such as vertical acceleration of the car body and tire deflection are evaluated in frequency domains on random road condition. In addition, performance comparison of WRMS(weighted root mean square) of the quarter-vehicle MR ECS system on random road are undertaken in order to investigate ride comfort characteristics.
Supported by : 영남이공대학교
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