The invention provides a commercial vehicle distributed brake-by-wire system and a control method. The control method comprises the steps of building a slip rate controller, and determining an actualslip rate and a target slip rate according to the state information of a vehicle, distributing a target braking torque to each driving wheel, establishing a braking cost function of the vehicle, and obtaining the expected total regenerative braking torque and the expected air pressure braking torque of each driving wheel by solving an extreme value of the cost function, and finally, determining the actual output braking torque of the motor according to the expected total regenerative braking torque in combination with the maximum torque and the minimum torque which can be provided by the motor, and then controlling the motor to output the actual braking torque. And meanwhile, the air pressure braking system is controlled to work according to all the expected air pressure braking torques. The ABS and regenerative braking can work coordinately, the stability of the vehicle is ensured, and the maximum energy regeneration is achieved.
本发明提供了一种商用车分布式线控制动系统及控制方法,控制方法包括步骤:先建立滑移率控制器,并根据车辆状态信息确认实际滑移率和目标滑移率;然后为各驱动轮分配目标制动扭矩;接着建立所述车辆的制动成本函数,通过对所述成本函数求极值得到所述预期总再生制动扭矩、各所述驱动轮的预期气压制动扭矩;最后根据所述预期总再生制动扭矩并结合电机能够提供的最大扭矩和最小扭矩确定电机的实际输出制动扭矩,然后控制电机输出实际制动扭矩;同时,根据各所述预期气压制动扭矩控制气压制动系统工作。本发明能够使ABS和再生制动协调工作,确保车辆的稳定性和达到最大能量再生。
Commercial vehicle distributed brake-by-wire system and control method
商用车分布式线控制动系统及控制方法
2020-07-17
Patent
Electronic Resource
Chinese
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