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为了提高汽车在突发爆胎事故时的稳定性,对爆胎汽车主动制动控制策略进行了研究。根据车轮爆胎时间与压力变化的关系,在UniTire模型基础上建立了爆胎模型;根据电子稳定性控制系统中横摆角速度及质心侧偏角对汽车稳定性影响的关系,基于二自由度汽车动力学模型,通过计算汽车横摆角速度及质心侧偏角实际值与理想值的偏差,并基于线性二次型调节器最优控制方法决策出最优附加横摆力矩,从而修正爆胎后汽车的运动状态。最后通过计算机仿真对所提策略的有效性进行了验证。结果表明:主动制动控制策略可以保证爆胎过程中汽车的行驶稳定性和安全性。
In order to improve the stability of the car in the event of a sudden puncture accident, the active braking control strategy of the puncture car was studied. According to the relationship between wheel burst time and pressure changes, a blowout model was established based on UniTire model. According to the relationship between the yaw rate and the center of mass roll angle of the stability control system based on the electronic stability control system, The dynamics model calculates the optimal yaw moment by calculating the deviation between the actual value and the ideal value of the yaw rate and the center of mass of the vehicle and the optimal control method based on the linear quadratic regulator, The state of movement. Finally, the validity of the proposed strategy is verified by computer simulation. The results show that the active braking control strategy can ensure the driving stability and safety of the car during tire puncture.