Dynamic Analyzer 动态分析
---Basic Theory ---基础理论
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Dynamic Signal Analysis Applications 动态信号分析应用
1. Basic Vibration Measurements 简单的震动检测 2. Structural Testing 结构检测 3. Measurement Techniques for Modal Analysis 模态分析中的检测技术 4. MIMO Measurements 多输入多输出检测方法 5. Using Synchronous Averaging and Polar Runouts to identify rotating
easily interpreted form 简化缩减数据，使之成为 简单易懂的形式 • Associate vibration characteristics
with features of a machine 机械结构的特征与震 动特性相联系 • Provide consistent and repeatable
machine defects使用同步平均和两端跳动量来识别旋转机械的缺陷
6. Waterfall Analysis for Rotating Machinery 旋转机械的瀑布图分析
7. Order Tracking for Rotating Machinery 旋转机械阶次跟踪分析 8. Demodulation 检波 9. Making precise Octave and 1/3 Octave S&V measurements and
measurements 连贯和可重复检测方法的运用 • Identify characteristics that change with
time, operating conditions or both识别由时间， 操作条件或它们两者的改变而产生的特征
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Units of Measurement 测量单位
2009-07-13
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Time versus Frequency Domain 时域信号对比频域信号
2009-07-13
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Time and Frequency Domain Analysis of a Machine
一个机械装置的时域和频域分析
2009-07用到。
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The Decibel (dB) 分贝（dB）
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Frequency domain view of common signals 常见信号的频域图
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Single Degree of Freedom System 单自由度系统
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Dynamic Signal Analysis Applications 动态信号分析应用
1. Basic Vibration Measurements 简单的震动检测 2. Structural Testing 结构检测 3. Measurement Techniques for Modal Analysis 模态分析中的检测技术 4. MIMO Measurements 多输入多输出检测方法 5. Using Synchronous Averaging and Polar Runouts to identify rotating
Spectrograms能够做精确的倍频程和1/3倍频程噪声振动测试和谱图 10. Data Recording and Event Capture: the key to catching process
problems early 数据记录和事件捕捉：关键在于及早的发现过程中的 问题。
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fn
1
2
k m
Natural Frequency of Single Degree of Freedom System 单自由度系统的固有频率
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Basic Vibration Measurements 简单的震动检测
• Principal Objectives 主要目的 • Simplify and reduce data into an
Spectrograms能够做精确的倍频程和1/3倍频程噪声振动测试和谱图 10. Data Recording and Event Capture: the key to catching process problems
machine defects使用同步平均和两端跳动量来识别旋转机械的缺陷
6. Waterfall Analysis for Rotating Machinery 旋转机械的瀑布图分析
7. Order Tracking for Rotating Machinery 旋转机械阶次跟踪分析 8. Demodulation 检波 9. Making precise Octave and 1/3 Octave S&V measurements and
Direct Recording in the Time Domain
直接记录时域信号 2008
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Indirect Recording in the Time Domain
间接记录时域信号 2008
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Simple Sine Waves construct Complex Waveforms 简单的正弦波组成的复杂波形
Conversion from Time domain to
Frequency domain is done using the
Fourier Transform 运用傅里叶变换将时域转换成频域
F ( j) f (t)e jt dt
f
(t )
1
2
F ( j)e jt d
In practice the Fast Fourier Transform (FFT) and Inverse Fourier Transform (IFFT) are used