DYNAMIC COUPLING ANALYSIS BETWEEN FRONT AND REAR AXLE FOR ABS SYSTEMS DESIGN

The common practice in Anti-lock Braking Systems (ABS) design is to employ a Quarter-Car model of the braking dynamics. The underlying hypothesis is to regard each wheel as dynamically decoupled from the rest of the vehicle. In this paper, we investigate the wheel slip dynamics behavior starting from a Half-Car model, i.e., taking into account the pitch and heave dynamics. This analysis allows to highlight the effects of dynamic coupling between front and rear axles and its effects on ABS systems design. Moreover, this analysis reveals an interesting trade-off between longitudinal and vertical motion. The results of this work allow to outline the possible benefits of an integrated design of active braking and suspensions control.