闪电脉冲信号仿真及其小波分析

Simulation and wavelet analysis of lightning pulse signal

为了研究闪电信号的物理特征并对闪电灾害进行监测预警,实现对闪电脉冲信号的软件仿真十分关键。简要介绍了闪电信号的典型物理特征,为模拟闪电脉冲信号提供理论依据;基于标准指数函数、双指数函数、Heidler函数、高斯脉冲函数、混合指数函数等数学模型仿真了单闪电脉冲信号,分析了它们的优缺点;提出了一种新的混合双指数模型来模拟近真实情况下的闪电脉冲串信号,采用小波分析方法对闪电脉冲仿真信号进行特征分析,初步获取了闪电脉冲信号的特征参数,为全闪探测系统的实现打下了一定的理论基础。

In order to study the physical characteristics of lightning signal and to monitor and warn the lightning disaster,it is very important to realize the software simulation of lightning pulse signal.This paper briefly introduces the typical physical characteristics of lightning signal and provides theoretical basis for the simulation of lightning pulse signal;Based on the mathematical model of standard exponential function,double exponential function,Heidler function,gaussian pulse function and mixed exponential function,the single lightning pulse signal is simulated,and their advantages and disadvantages are analyzed.It puts forward a new mixed double exponential model to simulate the lightning pulse string signal in the near real situation,use the wavelet analysis method to analyze the feature of lightning pulse simulation signal,the characteristic parameters of lightning pulse signal are preliminary obtained;It lays a certain theoretical foundation for the realization of full lightning detection system.