摘要
为提高经典频谱校正算法的测频精度,给出了基于卷积运算构造新窗函数的方法,并提出考虑负频谱响应的优化新算法。采用优化新算法对基波频率在工频信号周围变化的谐波信号进行频率测量研究,结果表明,新算法可以实现信号频率的高精度测量,测频精度最高可达nHz数量级;同时,新窗函数与新算法的有效结合可优势互补,具有广泛的应用前景。
To enhance the accuracy of frequency measurement of classical spectrum correction algorithm,the method of recreating window function based on convolution operation is given,and the new optimal algorithm considering negative spectrum response is proposed.By adopting new optimal algorithm,the frequency measurement of harmonic signals that the fundamental frequency changing around the industrial frequency is researched.The result shows that the new algorithm can implement frequency measurement with high accuracy,the highest accuracy may reach nHz;in addition,the effective combination of new window function and new algorithm is complementary in superiorities and offering wider applicable prospects.
出处
《自动化仪表》
CAS
北大核心
2010年第11期17-20,共4页
Process Automation Instrumentation
关键词
频率检测
频谱校正
优化算法
卷积窗
频谱泄露
谐波信号
Frequency detection Spectrum correction Optimal algorithm Convolution window Spectrum leakage Harmonic signal
