Abstract
This paper addresses the tasks of height and posture motion control for an electronically controlled active air suspension (AAS) system. A mathematical model of a vehicle body with AAS system is established to describe the dynamic characteristics and then formulated into a multi-input multi-output nonlinear system by considering parametric uncertainties and unmodelled dynamics. Based on this mathematical model, a synchronization control strategy is proposed to adjust the heights of adjacent AASs simultaneously, driving the pitch and roll angles closely to an arbitrarily neighborhood of zero, achieving global uniform ultimate boundedness. The proposed controller is robust to parametric uncertainties and external disturbances. A projection operator is utilized to limit the estimated parameters to their corresponding prescribed bounds in finite time. A co-simulation is conducted by combining a virtual vehicle plant with ASS system in AMEsim with the proposed synchronization controller in MATLAB/Simulink. Simulation results demonstrate that the proposed synchronization controller is effective and robust.
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Acknowledgements
This study was funded by the University of Macau Research Grant (Grant Numbers MYRG-2016-00212-FST, MYRG-2017-00135-FST and MYRG-2018-00198-FST), and by the Portuguese Fundação para a Ciência e a Tecnologia (FCT) through ISR (Grant Number LARSyS UID/EEA/50009/2019).
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Zhao, R., Xie, W., Wong, P.K. et al. Adaptive vehicle posture and height synchronization control of active air suspension systems with multiple uncertainties. Nonlinear Dyn 99, 2109–2127 (2020). https://doi.org/10.1007/s11071-019-05412-9
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DOI: https://doi.org/10.1007/s11071-019-05412-9