| 用时域峰值法计算频率和阻尼 |
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| 引用本文： | 李中付,华宏星,宋汉文,陈之炎.用时域峰值法计算频率和阻尼[J].振动与冲击,2001,20(3):5-6,31. |
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| 作者姓名： | 李中付 华宏星 宋汉文 陈之炎 |
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| 作者单位： | 1. 上海交通大学振动冲击噪声国家重点实验室上海 200030 中国人民解放军桂林陆军学院科技教研室桂林 5410023上海复旦大学力学与工程科学系上海 200433
2. 上海交通大学振动冲击噪声国家重点实验室上海 200030 |
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| 基金项目： | 国家自然科学基金资助项目(编号:19972016) |
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| 摘 要： | 时域参数识别法无需将测试信号在时域与频域之间变化，避免了由FFT变换引起的截断误差，如能量泄漏等。本文根据脉冲响应时间序列的峰值及其对应的时间序列计算频率、阻尼、幅值和相位。算例表明，本文方法计算精度高，不仅能高精度地识别频率、阻尼比、幅值，而且能有效地识别相位角，为重构信号创造了条件。
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| 关 键 词： | 信号处理 模态分析 频率 阻尼 时域峰值法 计算 时域参数识别 振动 |
Identification of Frequencies and Damping Ratios with Time Domain Peak Values |
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| Li Zhongfu , Hua Hongxing Song Hanwen Chen Zhiyan.Identification of Frequencies and Damping Ratios with Time Domain Peak Values[J].Journal of Vibration and Shock,2001,20(3):5-6,31. |
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| Authors: | Li Zhongfu Hua Hongxing Song Hanwen Chen Zhiyan |
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| Affiliation: | Li Zhongfu 1,2 Hua Hongxing 1 Song Hanwen 3 Chen Zhiyan 1 |
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| Abstract: | Parameters identification in time domain is accomplished in the paper with no truncation errors of FFT Transform such as the error of energy leakage.The time domain peak value method is presented and identification of parameters from the time series with single frequency is carried out.These parameters include frequency,damping ratio,amplitude and phase.Numerical simulations demonstrate that the time domain peak value method is very effective and precise frequency,damping ratio and amplitude are obtained.The phase angle can also be computed.With the method,impulse response signals in single degree of freedom system can be reconstructed. |
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| Keywords: | signal processing modal analysis frequencies damping ratios parameters identification |
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