现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
1期
104-106,109
,共4页
有源噪声控制%多周期噪声%快速傅里叶变换算法%滤波-X算法
有源譟聲控製%多週期譟聲%快速傅裏葉變換算法%濾波-X算法
유원조성공제%다주기조성%쾌속부리협변환산법%려파-X산법
active noise control%multicycle noise%fast Fourier transform algorithm%filtered-X algorithm
为了弥补已有消噪技术的缺陷及不足,结合实际应用对有源噪声控制技术及针对多周期低频噪声主动控制进行深入的研究,根据快速傅里叶算法(FFT)和凹槽滤波器的工作原理,系统地研究并设计滤波-X算法,进行相关计算机仿真出结果分析;运用快速傅里叶变换(FFT)的方法,将多周期信号从时域变换到频域,从而达到对多周期噪声消噪的目的。
為瞭瀰補已有消譟技術的缺陷及不足,結閤實際應用對有源譟聲控製技術及針對多週期低頻譟聲主動控製進行深入的研究,根據快速傅裏葉算法(FFT)和凹槽濾波器的工作原理,繫統地研究併設計濾波-X算法,進行相關計算機倣真齣結果分析;運用快速傅裏葉變換(FFT)的方法,將多週期信號從時域變換到頻域,從而達到對多週期譟聲消譟的目的。
위료미보이유소조기술적결함급불족,결합실제응용대유원조성공제기술급침대다주기저빈조성주동공제진행심입적연구,근거쾌속부리협산법(FFT)화요조려파기적공작원리,계통지연구병설계려파-X산법,진행상관계산궤방진출결과분석;운용쾌속부리협변환(FFT)적방법,장다주기신호종시역변환도빈역,종이체도대다주기조성소조적목적。
In order to make up the disadvantages in the exiting noise eliminating technology,a deep research on active noise control technology and active control of multicycle low-frequency noise is conducted combining practice application. With the working principle of fast Fourier transform algorithm(FFT)and the notch filter,the filtering-X algorithm is studied and de-signed systematically. Related computer simulation and results analysis are provided. By using fast Fourier transform (FFT) method,the multicycle signal is transformed from time domain to frequency domain,thus to realize the noise eliminating for multicycle noise.