| 基于瞬时频率估计的自适应Vold-Kalman阶比跟踪研究 |
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| 引用本文： | 赵晓平,张令弥,郭勤涛.基于瞬时频率估计的自适应Vold-Kalman阶比跟踪研究[J].振动与冲击,2008,27(12). |
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| 作者姓名： | 赵晓平 张令弥 郭勤涛 |
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| 作者单位： | 1. 南京航空航天大学振动工程研究所,南京,210016
2. 南京航空航天大学机电学院,南京,210016 |
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| 基金项目： | 国家自然科学基金资助
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| 摘 要： | 结合旋转机械启停阶段振动信号的特点,提出了一种基于Viterbi算法和短时傅里叶变换(STFT-VA)的瞬时频率估计算法,STFT-VA算法在高噪声、临近阶比和交叉阶比情况下有较高的精度.实现了基于STFT-VA算法的自适应Vold-Kalman阶比跟踪(AVKF-OT),和传统的以硬件实现的Vold-Kalman阶比跟踪(VKF-OT)相比,此方法具有无需转速计等硬件、用纯软件的方法实现.实验结果表明,该方法能够在时域中准确地提取幅值和复杂频率变化的阶比,适合于复杂旋转机械振动响应特征提取.
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| 关 键 词： | 短时傅里叶变换 Viterbi算法 瞬时频率估计 自适应Vold-Kalman阶比跟踪 |
ADAPTIVE VOLD-KALMAN ORDER TRACKING BASED ON INSTANTANEOUS FREQUENCY ESTIMATION |
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| ZHAO Xiao-ping,ZHANG Ling-mi,GUO Qin-tao.ADAPTIVE VOLD-KALMAN ORDER TRACKING BASED ON INSTANTANEOUS FREQUENCY ESTIMATION[J].Journal of Vibration and Shock,2008,27(12). |
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| Authors: | ZHAO Xiao-ping ZHANG Ling-mi GUO Qin-tao |
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| Affiliation: | ZHAO Xiao-ping1,ZHANG Ling-mi1,GUO Qin-tao2(1.Institute of Vibration Engineering,Nanjing University of Aeronautics , Astronautics,Nanjing 210016,China,2.College of Mechanical , Electrical Engineering,Nanjing University of Aeronautics , Astronautic,China) |
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| Abstract: | A new method of vibration signal instantaneous frequency estimation for run-up or coast down of rotating machinery based on short time Fourier transform and Viterbi algorithm(STFT_VA)was presented.STFT_VA algorithm has high precision in the situation of high noise,close orders and crossing orders.Adaptive Vold-Kalman order tracking(AVKF_OT)was carried out based on the algorithm of STFT_VA.In contrast with traditional method of Vold-Kalman order tracking,the method includes some advantages,for example,tacho ... |
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| Keywords: | short time Fourier transform viterbi algorithm instantaneous frequency estimation adaptive vold-Kalman order tracking |
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