In order to improve the ride comfort of vehicle, the inerter was used to vehicle suspension system to build “inerter-spring-damper” (ISD) suspension, the structure of ISD suspension was determined by using network synthesis method. The impedance transfer function of ISD suspension was obtained with the root-mean-square (RMS) of vehicle body acceleration as the ride comfort index. And it could be physically realized by using passive elements such as inerter, spring and damper. A quarter car vehicle model was built. By using the multi-objective optimization method, structural parameters of ISD suspension were optimized. On this basis, the performance of the suspension system was verified under random and pulse input. The results showed that in contrast to conventional suspension, the proposed suspension has a better dynamic performance. The RMS of body vertical acceleration is reduced about 26.83%，ISD suspension can suppress vertical vibration of vehicle body with frequency of 1~3 Hz and improve the ride comfort of vehicle.
Key words
suspension /
inerter /
network synthesis /
multi-objective optimization /
ride comfort
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References
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Footnotes
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Funding
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