Abstract
Semiactive suspension (SAS) system has been widely used for its outstanding performance in offering competent ride quality, road holding, and handling capacity. However, the road friendliness is also one of the crucial factors that should be attached in the design of the SAS system for heavy-duty vehicles. In this study, a fuzzy controlled hybrid-acceleration driven damper (ADD) and ground hook- (GH-) control strategy is proposed for SAS system of heavy-duty vehicles. Firstly, a quarter-vehicle model with SAS system is constructed. Then, aiming to improve the ride quality and road friendliness, a hybrid-ADD and GH-control strategy is proposed under the coordination of the fuzzy controller. Numerical results show that the ride quality and road friendliness of the SAS system with the proposed control strategy outperform those with traditional hybrid-sky hook and ground hook-control strategy. It is also verified that the proposed strategy is superior to the sole ADD approach and sole ground hook approach in improving the vehicle overall performance.
Highlights
In the past decades, ever increasing requirement in commercial transportation inevitably accelerates the maintenance cycle of the road [1]
It can be seen that acceleration driven damper (ADD) approach achieves the best performance as compared with other cases while ground hook (GH) approach performs worst
The reasons for the above results lie in the fact that the ADD approach and GH approach are designed for improving the sprung mass acceleration (SMA) and dynamic tire load (DTL), respectively
Summary
Ever increasing requirement in commercial transportation inevitably accelerates the maintenance cycle of the road (e.g., frequently overloading of the building materials in commercial vehicles accelerates the rate of pavement damage) [1]. Regarding the probability of road damage coming from commercial vehicles, the heavyduty vehicle accounts for a large percentage and is responsible for most of the road damage due to its huge axle load. The heavy-duty vehicle has been prevalently used and it cannot be replaced in commercial transportations due to its high loading capacity and low freight rate. Taking into account the cost of road maintenance, this work aims to design a road friendly suspension system for heavy-duty vehicles so that the road damage coming from heavy-duty vehicles can be reduced. The design of the road friendly suspension system can be regarded as an effective method to improve the road friendliness of the vehicle
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