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DYC(Direct Yaw moment Control,直接横摆力矩控制)能够提高汽车的操纵稳定性。提出一种采用分层控制结构的DYC控制系统,上层为横摆力矩决策层,采用滑模变结构控制,计算保持整车稳定所需要的附加横摆力矩;下层为横摆力矩分配层,将决策层得出的附加横摆力矩分配到每个驱动电机,并输出相应转矩。通过建立Car Sim和Simulink联合仿真平台,在双移线工况下,验证控制策略能够提高整车的操纵稳定性。
DYC (Direct Yaw moment Control, direct yaw moment control) can improve the steering stability of the car. A DYC control system with hierarchical control structure is proposed. The upper layer is a yaw moment decision-making layer, and the sliding mode variable structure control is used to calculate the additional yaw moment needed to keep the vehicle stable. The lower layer is the yaw moment distribution layer The additional yaw moments from the decision-making level are assigned to each drive motor and the corresponding torque is output. Through the establishment of Car Sim and Simulink co-simulation platform, under the condition of double-line displacement, the verification control strategy can improve the handling stability of the whole vehicle.