基于组合校正的城市轨道交通列车轮轨黏着控制方法研究

为提高城市轨道交通列车轮轨黏着力的控制,针对传统组合校正法存在的缺点,对参考速度进行延时补偿、筛选及步长限制,尽可能保证参考速度的准确性;对加速度提取采用低通加高通滤波器的方法,以降低噪声影响;黏着控制过程中,根据设定周期时间内速度差估算当前轨面黏着情况,实时调整下一周期判据阈值;根据上一调节周期触发空转时刻锁存转矩和当前加速度,以及转速差采用分段斜率的方法进行转矩调节。试验结果表明:上述控制方法转矩波动小,列车运行平稳,黏着利用率得到有效提高。

Wheel/Rail Adhesion Control of Urban Rail Transit Vehicle Based on Combined Correction Method

To improve the wheel/rail adhesion control of urban rail transit vehicle,the shortcomings of traditional combined correction method are pointed out.Through reference speed delay compensation,screening and limiting the step size,the accuracy of the reference speed is ensured as much as possible.Then,the low-pass+high-pass filter method is adopted for the acceleration extraction to reduce the influence of noise.In the process of adhesion control,the current rail surface adhesion is estimated according to the velocity difference within the set cycle time,and the criterion threshold of the next period is adjusted in real time.According to the torque latched at the trigger idle time of the last regulation cycle,the current acceleration and speed difference,the sectional slope method is used to adjust the torque.The test results show that the control strategy discussed in this paper has the advantages of small torque fluctuation,stable train running and effective adhesion utilization rate improvement.