Abstract
Inerters have become a hot topic in recent years especially in vehicle, train, building suspension systems, etc. Eight different layouts of suspensions were analyzed with a quarter-car model in this paper. Dimensionless root mean square (RMS) responses of the sprung mass vertical acceleration, the suspension travel, and the tire deflection are derived which were used to evaluate the performance of the quarter-car model. The behaviour of semi-active suspensions with inerters using Groundhook, Skyhook, and Hybrid control has been evaluated and compared to the performance of passive suspensions with inerters. Sensitivity analysis was applied to the development of a high performance semi-active suspension with an inerter. Numerical simulations indicate that a semi-active suspension with an inerter has much better performance than the passive suspension with an inerter, especially with the Hybrid control method, which has the best compromise between comfort and road holding quality.
Highlights
Automotive suspensions are designed to provide many functions such as vibration isolation of the passenger compartment from road inputs and control vertical tire loads to optimize braking, acceleration and handling
Note that the root mean square (RMS) ACC is the dimensionless RMS of sprung mass vertical acceleration; RMS SDF is the dimensionless RMS of suspension deflection, and RMS TDF is the dimensionless RMS of tire deflection. The comparisons of these results show that for Layout s3 to Layout s10, using the Hybrid control method results much better performance than the passive suspension with same layout
Sensitivity analysis was applied to the development of a high performance semi-active suspension with an inerter
Summary
Automotive suspensions are designed to provide many functions such as vibration isolation of the passenger compartment from road inputs and control vertical tire loads to optimize braking, acceleration and handling. Many papers have appeared in the literature on the optimization of passive suspensions, semi-active suspensions, and fully active suspensions. The high-order transfer functions from LMI approaches can be realized by electrical circuits which can significantly improve the performance, especially for soft systems where the traditional inerter structures cannot achieve significant performance improvement [15]. Groundhook, Skyhook and Hybrid control are semi-active control schemes that can be effectively applied to automobile suspensions. The dimensionless root mean square response of the sprung mass vertical acceleration, the suspension travel and the tire deflection are derived to evaluate the performance of the quarter-car model. Sensitivity analysis will be applied to the development of high performance semi-active suspension with an inerter. The effects of dimensionless parameters are considered and the performance of a passive suspension with an inerter and a semi-active suspension with an inerter are compared in order to highlight the benefits of a semi-active suspension with an inerter
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