Control Strategy for Double Motor Electric Vehicle Ⅲ

AWD control strategy

  The idea of all-wheel drive control strategy includes dynamic distribution strategy, stability distribution strategy, anti-skid distribution strategy and economic distribution strategy. The economic distribution strategy is referred to in Section 3.1. The dynamic distribution strategy is described in equation (3)

  Where, FMMax T is the front motor maximum torque, RMMax T is the rear motor maximum torque. The stability distribution strategy mainly considers the vehicle speed and the steering wheel angle. The vehicle speed is higher, the bigger the front axle distribution coefficient. The steering wheel angle is bigger, the bigger the front axle distribution coefficient. The front axle torque distribution coefficient MAP is shown in Fig. 3.

  The main idea of the anti-skid distribution strategy is that the drive torque is shifted back to the rear axle when the front wheel is slipping. When the rear wheel is slipping, the drive torque is shifted to front axle. The anti-skid distribution strategy has highest priority.