Model Following Damping Force Control for Vehicle Body Motion during Transient Cornering

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Model Following Damping Force Control for Vehicle Body Motion during Transient Cornering

Kikuchi, Hironobu / Inaba, Kazuaki

The aim of this study is to achieve the target transient posture of a vehicle according to the user’s steering operation. The target behavior was hypothesized to be a roll mode in the diving pitch, even during steering inputs on rough surfaces, in order to improve subjective evaluation. As a result of organizing the issues of feedforward control (FF) and feedback control (FB), we hypothesized that it would be appropriate to follow the ideal posture. The model following damping control (MFDC) was newly proposed by the authors as a solution to a control algorithm based on model-following control. The feature employs skyhook control (SH), which follows the deviation between the behavior of the reference model, which generates a target behavior with no input from the road surface, and the actual behavior of the vehicle. Numerical analyses were performed to verify the followability of the target behavior and the effect of roll damping performance. As a result of conducting actual vehicle experiments under driving conditions involving road surface input during steering, the MFDC was found to reduce the roll rate with respect to the steering angle by −6.4 dB compared to SH only.