摘要
测速定位系统是高速磁浮列车牵引和运行控制基础,与轮轨列车的系统相比,存在着如悬浮间隙波动、长定子轨道接缝及非接触式绝对位置读码等可能影响系统正常运行的特殊问题。为了降低悬浮波动对相对位置检测的影响,提出了利用悬浮间隙归一化处理相对位置检测信号的方法,使输出统一变换为8mm悬浮间隙下的信号,达到了磁极相角精度2.8°的检测要求;为了降低轨道接缝对相对位置检测的影响,提出了一种基于自适应滤波预估的两路检测信号切换的方法,消除了轨道接缝导致的信号畸变,满足了相对位置检测要求;为了解决绝对位置非接触读取问题,分析了相应的电磁感应电路模型,提出了提高激磁电压频率、幅值和降低发射线圈电阻等措施,满足了非接触读取绝对编码的要求。
Speed and position detection system is the basis of propulsion and traction control for high speed maglev train.Compared with traditional railways,high speed maglev trains have some exclusive problems which can affect system proper working,such as levitating fluctuation,joint gap of long stator track and contactless reader for absolute position.To reduce detection error of relative position due to levitating fluctuation,a method utilizing levitation gap to normalize detection output into the one of 8mm levitation gap is proposed.It is found that it can satisfy the precision requirement of 2.8°for relative position detection.To reduce detection error of relative position due to joint gap of track,a switching method between two relative-position detections based on a predictive adaptive filter was adopted.As a result,it can avoid distortion and satisfy the precision requirement of relative position detection.To solve the problem of absolute position reader by contactless method,an equivalent model of electro-magnetic induction reader was analyzed.It is found that the frequency and amplitude of magnetic fields need be increased and the resistor of emit coils need be decreased.As a result,it can satisfy the absolute position detection requirement.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2011年第1期109-114,共6页
Journal of National University of Defense Technology
关键词
高速磁浮列车
测速定位
悬浮间隙
轨道接缝
相对位置
绝对位置
high speed maglev train
speed and position detection
levitation gap
joint gap of track
relative position
absolute position
