抑制轨道台阶干扰的磁浮传感器间隙补偿算法  

Algorithm for Gap Compensating Signal of Maglev Levitation Sensor to Suppress Disturbance from Guide Way Step

作　　者：翟毅涛[1] 吴峻[1] 

机构地区：[1]国防科学技术大学机电工程与自动化学院,湖南长沙410073

出　　处：《铁道学报》2016年第7期77-83,共7页Journal of the China Railway Society

摘　　要：磁浮列车以较高的速度运行时,轨道台阶产生的干扰会使电磁铁的电流变化率急剧增大,对控制系统造成巨大冲击。考虑悬浮传感器探头受轨道台阶影响时的输出特性及三探头结构,建立了单点通过轨道台阶模型。根据探头输出特性进行轨道台阶的辨识,利用第1个通过轨道台阶的探头信息对后通过轨道台阶的2个探头输出安排过渡过程进行补偿,同时在传感器通过轨道台阶时切换间隙合成策略。仿真结果表明,新算法所得的合成间隙过渡平缓,在减小电磁铁的电流变化率方面效果明显,减小了轨道台阶对控制系统的冲击。新算法仅需要对传感器间隙安排1次过渡过程,对轨缝宽度、车辆速度等信息无特殊要求,更加适应存在连续多个轨缝的实际轨道情况。When a maglev train runs at a higher speed,the disturbance generated by the guide way step will cause a high changing rate of the elctromagnet current,which poses a huge impact on the control system.Considering the output characteristics of the probes of the levitation sensor under the influence of the guide way step and the 3-probe structure of the levitation sensor,a model for single levitation point to pass guide way step was built firstly.The guide way step was identified according to the output characteristics of the probes,and then the information gained from the probe that first passed the guide way step was used to compensate transient processes of output arrangement of the two probes that passed the guide way step later.Meanwhile,the strategy for gap synthesis was switched when the sensor crossed the guide way step.As illustrated in the simulation,by applying this new algorithm,the synthesis gap signal was smoother,and the effect of reducing the changing rate of the elctromagnet current was remarkable,which suppressed the impact of guide way step on the control system.The new algorithm,which only requires the arrangement of one transient process for the gap signal of the sensor,and has no special requirements for information such as rail gap width and train speed,is more applicable to the actual situation of the guide way with gaps in succession.

关 键 词：磁浮列车 轨道台阶 悬浮传感器 安排过渡过程 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程] TP212[自动化与计算机技术—控制科学与工程]