论文部分内容阅读
由于轮轨黏着状态受车轮和轨道的表面状况、外部环境以及车辆速度等因素变化的影响,为了保证车辆在高速阶段制动的有效性和安全性,并获得最大的黏着利用,防止车轮因打滑而损伤轮轨,控制系统必须提供稳定有效的制动力。为此建立了新的制动气缸压力模型、鼠笼型异步电机模型和90个自由度的动车多刚体模型,采用Oldrich Polach的黏着力计算模型,并加入轨道激扰。开关信号控制气缸的冲排气,直接转矩策略控制电机,改进的递归最小二乘法判别车轮粘滑状态,滑模控制算法计算最佳制动力。当电机输出的制动力不足时,空气制动加以补充。仿真结果表明,基于上述方法的防滑控制系统具有良好的性能,达到了期望的控制效果。
Due to the influence of wheel and rail surface condition, external environment and vehicle speed and other factors, in order to ensure the effectiveness and safety of the vehicle during high-speed braking and to obtain the maximum adhesive utilization, to prevent the wheel from slipping Damage to the wheel and rail, the control system must provide a stable and effective braking force. For this purpose, a new brake cylinder pressure model, a squirrel-cage induction motor model and a 90-degree-DOF multi-body rigid body model were established. The Oldrich Polach’s adhesion model was used and the orbital disturbances were added. The switching signal controls the flushing and exhausting of the cylinder, the direct torque strategy controls the motor, the improved recursive least squares method determines the stick-slip state of the wheel, and the sliding mode control algorithm calculates the optimal braking force. When the motor output braking force is insufficient, the air brake to be replenished. The simulation results show that the anti-skid control system based on the above method has good performance and achieves the desired control effect.