摘要
为弥补高速列车传统接触式测速方式的误差,本文设计了一种高精度列车车载多普勒测速系统。主要包括测速系统硬件的搭建与测速软件的设计实现,通过TMS320f28335型DSP对多普勒信号进行处理并实时与上位机进行通信。采用现代谱估计中AR参数模型法对列车的多普勒信号进行功率谱分析。最后通过多普勒信号的仿真实验与误差分析证明该列车测速系统在整个测速范围内测速精度误差小于1%,在小于50 km/h运行时误差小于0.1 km/h,具有高精度与可靠性强的优点。
In order to make up for the error of traditional contact speed measurement method for high-speed trains, this paper designs a high-precision Doppler vehicle speed measurement system based on AR model.Mainly includes the design and realization of the hardware of the speed measurement system and the software of speed measurement. The Doppler signal is processed by DSP and communicated with the host computer in real time. The power spectrum of the Doppler signal of the train is analyzed by the AR parameter model method in modern spectral estimation.Finally, the simulation experiment and error analysis of Doppler signal prove that the error of speed measurement accuracy of the train speed measuring system is less than 1%, in less than 50km/h run error less than 0.1km/h, with high accuracy and reliability advantages.
作者
黄颖
蔡鸿杰
HUANG Ying;CAI Hong-jie(School of Mechanical and Electronic Control Engineering,Beijing Jiaotong University,Beijing 100044,China;Beijing Aerospace Automatic Control Institute,Beijing 100854,China)
出处
《电子设计工程》
2018年第23期117-120,共4页
Electronic Design Engineering
