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Magnetorheological Fluid Shock Absorber for Electronic Control Suspension of a Passenger Vehicle

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This paper examines the practical feasibility of magnetorheological (MR) fluid shock absorber for electronic control suspension (ECS) on vibration control performance. A cylindrical type of MR fluid shock absorber is designed and manufactured based on the optimized damping force levels and mechanical dimensions required for a commercial middle-sized passenger vehicle. After experimentally evaluating dynamic characteristics of the manufactured MR shock absorber, the quarter-vehicle MR suspension system consisting of sprung mass, spring, tire and the MR shock absorber is constructed in order to investigate the vibration control performance of ECS equipped with MR shock absorber. After deriving the equations of the motion for the proposed quarter-vehicle MR suspension system, the three control strategies are then implemented for the realization of quarter-vehicle MR suspension system. In order to present the practical feasibility of ECS using MR shock absorber, ride comfort and driving stability characteristics such as vertical acceleration of sprung mass and tire deflection are experimentally evaluated under various road conditions and presented in both time and frequency domain.
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Document Type: Research Article

Publication date: 2012-07-01

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