Vehicle Height and Posture Control of the Electronic Air Suspension System with Adjustable Damping based on Hybrid Model

Adjusting the body height is the basic function of electronic air suspension, which improves the driving performance of the whole vehicle. Therefore, a novel body height control strategy with adjustable damping is proposed in this paper to optimize the dynamic response of body height control. Since the travel adjustment of the electronic air suspension requires direct control of solenoid switches, a single-wheel electronically controlled air suspension model is built using hybrid logic dynamics and a self-contained mixed-model predictive controller is used for height control. To suppress suspension oscillations, a height error tolerance range is introduced based on the height controller, while a skyhook damping control strategy based on the target height deviation is proposed to achieve damping regulation. According to the simulation conclusions, the coordinated height control and damping control technique has adequate control accuracy, effectively suppresses dynamic oscillations, and minimizes the number of solenoid valve switching.