The influence of different ride comfort evaluation metrics on the optimal damping ratio of vehicle suspension system is studied. Based on the linear theory of quarter vehicle suspension system, a time domain model of road roughness and a 2 degree-of-freedom (DOF) suspension-tire model are established using Matlab/Simulink. The accuracy of the road model is simulated and verified first. Vehicle-Body acceleration root mean square (RMS) with and without frequency weighting is used as evaluation metrics to calculate the optimal damping ratio. A comparison of the above-mentioned results indicates that the optimal damping ratio calculated with frequency weighting is smaller than that without frequency weighting. It is also noted that the optimal damping ratio is independent from road grades and vehicle speeds. Finally, a comprehensive evaluation metrics considering the factors of the vehicle-body acceleration, the suspension dynamic deformation and the wheel dynamic load is proposed. Analysis result utilizing the newly proposed metrics indicates that the optimal damping ratio is dependent on road grades and vehicle speeds. This paper provides a basis for vehicle suspension damping optimization and control.
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戴振泳,李 涛,宋廷伦,等. 不同平顺性评价指标对悬架最优阻尼比的影响[J]. 科学技术与工程, 2020, 20(21): 8798-8803. DAI Zhen-yong. Influence of Different Ride Comfort Evaluation Metrics on the Optimal Suspension Damping Ratio[J]. Science Technology and Engineering,2020,20(21):8798-8803.