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Robust design optimization of the vehicle ride comfort considering tolerance effect

conference contribution
posted on 06.12.2017, 00:00 by P Song, Maksym SpiryaginMaksym Spiryagin, H Yoo
Vehicle vibration mostly originates from the road excitation and causes discomfort, fatigue and even injury to a driver. Vehicle ride comfort is one of the most important performance indices to achieve a high-quality vehicle design. Since design parameter tolerances inevitably result in the vehicle ride comfort variance, the variance characteristics should be analyzed in the early design stage of the vehicle. The vehicle ride comfort is often defined by an index whichemploys a weighted RMS value of the acceleration PSD of a seat position. The design solution is obtained through two steps in this study. An optimization problem to obtain a minimum ride comfort index is solved first. Then another optimization problem to obtain minimum variance of the ride comfort index is solved. For the optimization problems, the equations of motion and the sensitivity equations are derived basing on a 5-DOF vehicle model. The numerical resultsshow that an optimal solution for the minimum ride comfort index is not necessarily that for the minimum variance of the ride comfort index.


Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)


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Start Date



Daejon, Korea


International Institute of Acoustics and Vibration

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Peer Reviewed


Open Access


External Author Affiliations

Hanyang Taehakkyo;

Era Eligible


Name of Conference

International Congress on Sound and Vibration

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