基于速度信号的内燃轨道车卸载控制分析与优化

Analysis and Optimization of Unloading Control Based on Locomotive Speed Signal

非正常卸载是机车常见运行故障之一,会造成牵引力的损失,增加纵向冲击,影响车钩的寿命,导致中间直流母线电压直线上升,甚至引起过压等一系列故障。机车速度干扰引起的非正常卸载往往很难定位及处理。基于GCD-1000交流传动轨道车在台架试验中发生的非正常卸载,通过试验数据分析机车速度干扰导致非正常卸载的原因,从整车控制的角度提出了速度信号滤波及多速度信号综合判断的优化改进措施,增加了信号滤波算法,修改了控制逻辑策略。通过仿真及实验验证了该优化方案的可行性,有效地降低了故障发生率,达到了预期的效果,对机车非正常卸载故障的分析及解决具有指导意义。

Abnormal unloading is one of the common operating faults of locomotives,which will cause loss of traction,increase longitudinal impact,affect the life of the coupler,cause the voltage of the intermediate DC bus to rise linearly,and even cause a series of faults such as overvoltage.Unusual unloading due to locomotive speed disturbance is often difficult to locate and handle.Based on the abnormal unloading of the GCD-1000 AC drive railcar in the bench test,the test data was used to analyze the cause of the abnormal unloading caused by the locomotive speed disturbance.From the perspective of vehicle control,the optimization improvement measures of the speed signal filtering and multi-speed signal synthesis judgment were proposed.The signal filtering algorithm was added,and the control logic strategy was modified.The feasibility of the optimization scheme was verified by simulation and experiment,which effectively reduced the failure rate and achieved the expected result.The optimization scheme proposed has guiding significance for the analysis and solution of abnormal unloading faults of locomotives.