无砟轨道轨向动静态轨向数据的差异性的时频域解释

轨道平顺性控制依赖于轨道检测。工务实践中,轨道动静检数据幅值常不一致,直接影响了对超限病害的诊断。从动静检的原理出发,分析了以轨检车为代表的动检系统及以轨检仪为代表的静检系统的系统传递函数,并利用待定系数法推导了长波不平顺的扩展算法。认为:动静检轨向偏差的主因在于两套系统的幅频特性的差异,静检幅值一般大于动检幅值。

New Insights into the Alignment Data Bias between Kinematical Measurement and Static Measurement for Ballastless Track

The control of track roughness is depend on the track survey. In the practice of track maintains, the data of static survey is often inconformity to kinematical survey and this inconformity should lead to a dilemma for overrun fault diagnosis. This paper has analyzed the transfer function of kinematical system (e.g. track inspection car) and static system(e.g. track inspecting instrument) from the principle of track survey, and deduced an extended algorithm by means of undetermined coefficient method. It is consider as that: the fundamental cause of bias between two systems lies in the difference of gains. In general, the gain of static survey is greater than the gain of kinematical survey.