高铁运行网络安全信号实时监测仿真研究  

Simulation of Real Time Monitoring of Network Security Signal in High Speed Railway Operation

作　　者：王德铭[1] 田爱军[1] WANG De - ming;TIAN Ai - jun(School of Rail Transport, Xuzhou Technician College, Xuzhou Jiangsu 221151, China)

机构地区：[1]徐州技师学院轨道交通学院,江苏徐州221151

出　　处：《计算机仿真》2018年第4期98-101,共4页Computer Simulation

基　　金：煤矿井下灾后救援网络重构与应急数据流传输关键问题研究(61471361)

摘　　要：对高铁运行网络安全信号的监测,能够有效预防高铁运行网络入侵信号的危害。对高铁运行网络安全信号的监测,需要对动态信号进行前置滤波,进而实现信号的高斯随机特性的仿真,完成安全信号的监测。传统方法首先对高铁运行网络数据进行属性约简,利用DCA算法进行信号的监测,但忽略了对信号进行高斯随机特性仿真,导致监测精度偏低。提出小波包跳频网络安全信号实时监测方法。首先对动态信号进行前置滤波,将安全信号的虚假分量进行去除,建立信号监测模型。利用小波包跳频估计算法进行信号监测,将信号进行Fourier变换,得出网络信号特征,对动态信号的高斯随机特性进行模拟,利用其高阶累积量高斯的可加性,得出信号实时监测幅频的响应输出,由此完成对网络安全信号实时监测。实验结果表明,上述方法能有效地提高网络安全信号实时监测的精度。This article proposes a real - time monitoring method for network security signal of frequency hopping based on wavelet packet. Firstly, the dynamic signal is pre -filtered to eliminate false component of safety signal, thus signal monitoring model is built, then signal is monitored by using estimation algorithm of frequency hopping of wavelet packet and transformed signal by Fourier to obtain network signal feature, and then Gauss random feature of dynamic signal is simulated. Finally, the response output for amplitude frequency of signal real - time monitoring is obtained by using Gauss additivity of its higher order cumulant, thus signal real - time monitoring of network security is completed. The simulation results show that the method above can effectively improve real -time monitoring accu- racy of network security signal.

关 键 词：高铁运行网络 安全信号 实时监测 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]