轨道不平顺检测系统优化设计

Optimization design of track irregularity inspection system

文章针对一种轨道不平顺检测系统进行优化设计,将轨道不平顺作为一种空间分布的模拟信号来处理。首先将轨道不平顺通过传感器转换为模拟信号,然后进行限带、基于空间频率的采样和离散化,从而解决基于时间频率进行采样带来的数据有效性问题,排除检测系统推行速度对采样带来的影响。通过配合设置抗混叠滤波器和FIR数字滤波器改善检测系统对轨道不平顺波形的复原能力,并为不平顺检测数据按波长范围分类处理分析提供解决方案。通过试验,复原出模拟轨道不平顺的波形。

This paper focuses on an optimization of a track irregularity inspection system, and the track irregularity is proceeded as an analogue signal of spatial distribution. Firstly, the track irregularity is converted into an analogue signal by a sensor, and then it carries out band-limited, space-frequency-based sampling and discretization, so as to solve the problems related with data validity brought about by time-frequencybased sampling and eliminate the impact of the running speed of the inspection system on the sampling. The anti-aliasing filter and FIR digital filter are integrated to improve the recovery ability of the inspection system to track irregularity waveform, providing a solution for the classified processing and analysis of irregularity inspection data according to the wavelength range. The waveform of simulated track irregularity is restored in the tests.