高噪声背景下故障信号自适应检测
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摘要
为尽早发现电厂锅炉潜在故障,以研究高噪音背景下故障自适应检测系统为途径,提出了高噪音背景下故障信号检测的算法。传统的倒谱分析是对信号基于FFT(Fast Fourier Transformation)变换,而该算法对其进行改进,基于CZT(Chirp Z-Transform)变换进行求逆,得到的故障特征曲线更稳定、更可靠。通过实验证明,该计算方法快速有效,故障报出的正确率在99%以上。
For early detection of boilers potential failure in power plant the high noise background fault self-adaptive detection system is studied.A higher background noise fault signal detection algorithm is provided.Simulation experiment results,and points out that the efficiency of the method.The traditional cepstrum analysis is applied to signal based on FFT(Fast Fourier Transformation) transform,and the algorithm is based on the improvement CZT(Chirp Z-inverse Transform) transform,get the failure characteristics of curve more stable,and more reliable.The experimental results show that this method is fast and effective,fault quoted accuracy over 99%.
For early detection of boilers potential failure in power plant the high noise background fault self-adaptive detection system is studied.A higher background noise fault signal detection algorithm is provided.Simulation experiment results,and points out that the efficiency of the method.The traditional cepstrum analysis is applied to signal based on FFT(Fast Fourier Transformation) transform,and the algorithm is based on the improvement CZT(Chirp Z-inverse Transform) transform,get the failure characteristics of curve more stable,and more reliable.The experimental results show that this method is fast and effective,fault quoted accuracy over 99%.
引文
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[3]宋德亮,张国毅,齐丽君.小波降噪在相位差变化率定位技术中的应用[J].吉林大学学报:信息科学版,2009,27(3):235-241.SONG De-liang,ZHANG Guo-yi,QI Li-jun.Applying Wavelet De-Noising to Passive Location Technology Based on PhaseDifference Rate of Change[J].Journal of Jilin University:Information Science Edition,2009,27(3):235-241.
[4]钱克矛,李川奇.频谱校正的线性调频Z变换方法[J].振动工程学报,2000,13(4):628-632.QIAN Ke-mao,LI Chuan-qi.New Spectrum Correction Method Based on Chirp Z Transform[J].Journal of Vibration Engi-neering,2000,13(4):628-632.
[5]陈祝明,丁义元,向敬成.采用Chirp-Z变换提高LFMCW雷达的测距精度[J].信号处理,2002,18(2):110-112.CHEN Zhu-ming,DING Yi-yuan,XIANG Jing-cheng.Improving Range Precision of LFMCW Radar by Chirp-Z Transform[J].Journal of Signal Processing,2002,18(2):110-112.
[6]李威,陈祖斌.宽频地震仪数据采集通道的噪声分析[J].吉林大学学报:信息科学版,2006,24(5):462-465.LI Wei,CHEN Zu-bin.Applying Wavelet De-Noising to Passive Location Technology Based on Phase Difference Rate ofChange[J].Journal of Jilin University:Information Science Edition,2006,24(5):462-465.
[7]李华,李尚柏,周维,等.线性调频Z变换在电力谐波分析中的应用[J].电测与仪表,2005,42(3):1-5.LI Hua,LI Shang-bai,ZHOU Wei,et al.Chirp-Z Transform and Its Application in Power System Harmonic Analyais[J].Electrical Measurement&Instrucmentaion,2005,42(3):1-5.
[8]LANARI R.A New Method for the Compensation of the SAR Range Cell Migration Based on the Chirp-Z Transform[J].IEEE Trans on Geoscience and Remote Sensing,1995,33(5):1296-1299.
[9]张宇,吕海峰,赵远,等.基于非线性系统随机共振的多频弱信号检测[J].吉林大学学报:信息科学版,2007,25(1):68-72.ZHANG Yu,L Hai-feng,ZHAO Yuan,et al.Detection of Multi-Frequency Weak Signal Based on Stochastic Resonance ofNonlinear System[J].Journal of Jilin University:Information Science Edition,2007,25(1):68-72.
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