基于LabVIEW的离散频谱校正技术仿真  

Simulation of Discrete Spectrum Correction Based on LabVIEW

作　　者：陶峰[1] 李志华[1] 罗知亮 

机构地区：[1]中国地质大学(武汉)自动化学院,湖北武汉430074

出　　处：《测控技术》2015年第4期153-156,共4页Measurement & Control Technology

摘　　要：在许多工程应用领域,离散频谱分析发挥着越来越重要的作用,频谱分析结果的精确程度是在工程应用取得成功的关键因素之一,但是在现阶段,经过快速傅里叶变换得到的离散频谱,其频率、幅值和相位均可能产生较大误差。基于这一原因,研究了离散频谱的校正技术,通过LabVIEW软件编写出两种基于频谱校正方法(比值校正法和能量重心校正法)的校正程序,并构造相应的函数仿真来验证该方法的可行性。通过仿真结果分析,表明该程序可以进行离散频谱校正,大大提高频谱分析的精度,取得了不错的效果。In many engineering applications,discrete spectrum analysis plays an increasingly important role.The accuracy of the results of spectrum analysis is one of the key success factors for the ability to obtain in engineering applications.However,at this stage,after the fast Fourier transform,the discrete spectrum is likely to produce large errors in the frequency,amplitude and phase.For that reason,the technology of discrete spectrum correction is researched.With the software of LabVIEW,two calibration procedures based on spectrum correction methods（ratio correction method and the energy gravity correction method） are created.And the corresponding function simulation is constructed to verify the feasibility of the method.Through analysis of the simulation results,the program can be used for discrete spectrum correction.The method can greatly improve the accuracy of the spectrum analysis and achieve good results.

关 键 词：离散频谱分析 频谱校正 LABVIEW 

分 类 号：TN911[电子电信—通信与信息系统]