Abstract:

The narrow body vehicle can help to solve the problems of road occupation， space waste， energy crisis， and environmental pollution and the active rollover technology can be applied to solve the rollover risk of narrow body vehicle. According to the movement characteristics of active roll of the narrow body vehicle， the body dynamics model of the narrow body vehicle is established. In consideration of the active roll characteristics and the wheel load changes caused by the lateral and longitudinal movement of the vehicle， combined with the UniTire unified tire model， the phase plane analysis of the state parameters of the active roll narrow body vehicle under the limit state conditions is carried out to verify the motion mechanism of the narrow body vehicle， obtain the limit state motion rules and motion characteristics， which lays a foundation for further study on the improvement of stability of the narrow body vehicle.

Key words: active roll of narrow body vehicle, limit state, dynamic mechanism, phase plane