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| Instantaneous Frequency Measurement Based on APHHT |
| ZHOU Yun1,LI Shi-ping1,LUO Peng1,ZHOU Qiu-ping2 |
1. The Second Artillery Engineering Univercity, Xi’an, Shaanxi 710025, China
2. Urban Vocational College of Chongqing, Chongqing 402160, China |
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Abstract All phase spectrum analysis can effectively suppress the leakage of spectrum and optimize the system performance,the gordian technique of this method is the data preprocessing based on all phase. This data preprocessing method was used to measure the instantaneous frequency (IF) based on HHT, and an instantaneous frequency measurement based on all phase HHT (APHHT) was proposed. The algorithm of data preprocessing based on all phase and HHT were analyzed, the signal was first preprocessed by all phase then IF was achieved by HHT. This method is an algorithm for optimizing the system performance, which would not raise the complex of the calculation greatly. Through computer simulation on a non-stationary signal, it can be verified that IF based on APHHT has a small variance, which means it has a higher accuracy.
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［1］王兆华,操继华,韩萍.FOUREIER重叠数字滤波器［J］.信号处理,2001,17（2）:189-191.
［2］王兆华,侯正信,苏飞.全相位FFT频谱分析［J］.通信学报,2003,24（11A）:6-19.
［3］王兆华,黄翔东.数字信号全相位谱分析与滤波技术［M］.北京 :电子工业出版社,2009.
［4］Hou Zhengxin, Yang Xi. The all phase DFT filter［C ］// IEEE. Proceedings of 2002 IEEE 10th Digital Signal Processing Workshop and 2nd Signal Processing Education Workshop. Piscataway, NJ, USA, 2002: 221-226 .
［5］邓振淼,刘渝. 基于全相位频谱分析的正弦波频率估计［J］. 数据采集与处理,2008,23(4): 449-454.
［6］黄晓红,王兆华.基于全相位频谱分析的正弦信号高精度参数估计方法［J］. 电力自动化设备, 2008,28(7):54-56.
［7］Huang N E,Shen Z,Long S R,et al. The Empirieal Mode Decomposition and Hilbert spectrum for Nonlinear and Nonstationary Time Series Analysis［J］. Proc Roy Soc Lond A, 454:903-995.
［8］蔡艳平,李艾华,王涛,等. 基于EMD-Wigner-Ville的内燃机振动时频分析［J］. 振动工程学报,2010,23(4):430-437.
［9］刘彬,蒋金水,于伟凯. EMD相关度去噪及其在轧机信号处理中的应用［J］. 计量学报, 2009,30(1): 72-77.
［10］谢平,王欢,杜义浩. 基于EMD和Wigner-Ville分布的机械故障诊断方法研究［J］. 计量学报, 2010,31(5):389-394. |
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2012, Vol. 33 
