Effect of Vibration Absorber on Vehicle Ride Comfort
Abstract:Ride comfort, an important issue in vehicle design, depends on whether the performance of suspension is excellent or not. Wheel-hub motor vehicles, which install directly the energy source-motor in the wheel, have gradually been noticed because of the rise of environmental consciousness in recent years. Even though this design can increase the power transmission efficiency, it makes ride comfort poor because the unsprung mass is overweight. For improving this negative effect, this research uses a vibration absorber to absorb the wheel vibration. Vibration absorbers can be an extra mass or be wheel-hub motor itself; besides, absorbers can also be applied in traditional suspension to improve the ride comfort of vehicles. This study constructs a three-degrees-of-freedom (3 D.O.F.) quarter car model which includes a car body, a wheel, and a vibration absorber to analyze the effect of vibration absorber design by using vibration optimization theory on body vibration restrain, and evaluate the effect of random road input on vehicle frequency response index and human body weighted acceleration root-mean-square (R.M.S.) value. ADAMS/Ride is used to verify the proposed approach. The conclusion of this study can give suggestions for application of vibration absorber on vehicle suspension in the future.
Document Type: Research Article
Publication date: July 1, 2012
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