【摘要】：在測(cè)試軟件LabVIEW平臺(tái)的基礎(chǔ)上,研究了利用時(shí)頻域測(cè)試方法來分析信號(hào)在時(shí)-頻平面上的能量分布情況。此測(cè)試分析方法利用短時(shí)傅里葉變化STFT的基本原理,對(duì)一些非平穩(wěn)的信號(hào)進(jìn)行分析,能很好地描述信號(hào)的頻率如何隨時(shí)間而變化。對(duì)長(zhǎng)度有限的信號(hào)進(jìn)行施加窗函數(shù)處理,從而來更好地分析窗函數(shù)的不同選擇對(duì)時(shí)頻域分析的影響,具有一定的優(yōu)越性和創(chuàng)新性。
[Abstract]:On the basis of the testing software LabVIEW, the time-frequency domain testing method is used to analyze the energy distribution of the signal in the time-frequency plane. This test and analysis method uses the basic principle of short-time Fourier variation STFT to analyze some non-stationary signals, which can well describe how the frequency of the signal changes with time. In order to better analyze the influence of different selection of window function on the analysis of time and frequency domain, it has some advantages and innovations to apply window function to the signal with limited length and to process the window function in order to better analyze the influence of window function on time and frequency domain analysis.
【作者單位】： 寧波吉利羅佑發(fā)動(dòng)機(jī)零部件有限公司;浙江吉利羅佑發(fā)動(dòng)機(jī)有限公司;
【分類號(hào)】：TN911.7
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本文編號(hào)：2475833