Abstract
Vehicle rollover is an important road safety problem world-wide. Although rollovers are relatively rare events, they are usually deadly accidents when they occur. The roll stability loss is the main cause of rollover accidents in which heavy vehicles are involved. In order to improve the roll stability, most of modern heavy vehicles are equipped with passive anti-roll bars to reduce roll motion during cornering or riding on uneven roads. However, these may be not sufficient to overcome critical situations. The active anti-roll bar system is considered as the most common method in order to improve the roll stability of heavy vehicles. In this chapter, the authors are interested in the effects of the internal leakage inside the electronic servo-valve on the performance of the active anti-roll bar system of heavy vehicles. Hence, the main contents are summarized in the following points:
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The internal leakage inside the electronic servo-valve is analysed in detail and characterized by the total flow pressure coefficient. Thanks to this leakage, it is important that the active anti-roll bar system can act in a self-protection capacity when the controller fails.
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An H ∞∕LPV active anti-roll bar controller for the fully integrated model is synthesized by using the grid-based LPV approach. Here, the forward velocity is considered as the varying parameter to adapt to the different types of heavy vehicle movements.
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The simulation results indicate that the internal leakage inside the electronic servo-valve drastically affects the characteristics of the closed-loop system. The two main objectives (enhancing roll stability and avoiding the saturation of the actuators) are simultaneously satisfied when the total flow pressure coefficient K P is chosen in the interval \([5\times 10^{-15}, 4\times 10^{-10}]\ \frac {{m}^5}{{Ns}}\).
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This analysis is the basis for further studies of the fault tolerant control and fault accommodation on the active anti-roll bar system of heavy vehicles using the ESVH actuators in order to improve the performance of the active anti-roll bar system.
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This work has been supported by the University of Transport and Communications through the key project T2019-CK-012TD.
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Tan, V.V., Dai, V.Q., Sename, O., Jazar, R.N. (2022). Oil Leakage Analysis for an Active Anti-Roll Bar System of Heavy Vehicles. In: Dai, L., Jazar, R.N. (eds) Nonlinear Approaches in Engineering Application. Springer, Cham. https://doi.org/10.1007/978-3-030-82719-9_13
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