Abstract
Dynamic behaviours of driver-car systems in critical road situations are investigated for the purpose of traffic safety. The characteristics of car dynamics change suddenly when a car runs on from dry to wet surface of road. Moreover when running on curve, un-balanced lateral force and moment are added to the system. According to an experiment using a driving simulator, adaptive behaviours of driver-car systems are found in this critical situation. In order to explain the adaptive behaviours, a new mathematical model of human driver is developed by use of the theory of model reference adaptive control and predictive control. The computer simulation with this model is carried out, where a compensation gain of driver is change-able, depending on changes of car parameters. It is verified that the model proposed here is good enough to take account of the dynamical behaviours of driver-car system in the critical situation when confronting suddenly appearing wet surface on curve.
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