Vibration Measurement and Analysis
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Vibration Measurement and Analysis presents the different approaches of vibration measurement and analysis techniques. The book begins with a discussion of the reasons for conducting vibration measurements. Subsequent chapters cover topics on general measurement requirements, transducers and the measurement of sound, and signal conditioning and recording. Analysis methods and frequency analysis, techniques of correlation and averaging, and automation of vibration testing are discussed as well. Mechanical engineers will find the book very useful.
Table of Contents
Preface
1 Introduction
1.1 Reasons for Measurement
1.2 Single Degree of Freedom Systems
1.3 Two Degrees of Freedom
2 General Measurement Requirements
2.1 The Measurement Chain
2.2 Transducer Criteria
2.3 Linearity and Discrimination
2.4 Frequency Range
2.5 Cross-Axis Sensitivity
2.6 Electrical Impedance Matching
2.7 Mechanical Matching
2.8 Conditioning
2.9 Viewing or Recording
2.10 Signal to Noise Ratio
3 Types of Transducer
3.1 Classification
3.2 Contact Relative Transducers for Displacement
3.3 Relative Velocity Contact Transducers
3.4 Strain Gauges
3.5 Non-Contact Relative Displacement Transducers
3.6 Doppler Types
3.7 Interferometer Methods
3.8 Seismic Systems
3.9 Accelerometers
3.10 Resistive Accelerometers
3.11 Accelerometer Calibration
3.12 Choice
4 Measurement of Sound
4.1 Introduction
4.2 Scales
4.3 Measurement
4.4 Effects of Sound Fields
4.5 Sound Intensity
5 Digital Measurement Systems
5.1 Introduction
5.2 Fringe Counting Systems
5.3 Laser and Electrical Systems
5.4 T.E. Measurement
5.5 Torsional Vibration
5.6 Torsional Comparisons
6 Signal Conditioning
6.1 Operational Amplifiers
6.2 Sealers, Buffers and Integrators
6.3 Filters and Differentiators
6.4 Low Impedance and Charge Amplifiers
6.5 Displacement, Velocity, Acceleration or Jerk
6.6 Bridge Systems
6.7 Phase Sensitive Detectors
6.8 Enveloping
7 Recording
7.1 Direct Writing Systems
7.2 Tape Recording
7.3 Transient Recording
7.4 Digital Recording
7.5 Pre-Processing
7.6 Method Selection
7.7 Aliasing and Sampling
8 Vibration Excitation
8.1 Introduction
8.2 Methods Available
8.3 Relative Advantages
8.4 Mass Compensation
8.5 Machine Excitation
8.6 Waterfall Displays
8.7 Reciprocal Theorem
8.8 Model Testing
8.9 Sweep, Random, Chirp and Impulse
9 Analysis Methods and Frequency Analysis
9.1 Introduction
9.2 The Raw Vibration
9.3 Frequency Analysis
9.4 The Two Types of Spectrum, Conversions
9.5 Bandwidth and Power
9.6 Choice of Bandwidth
9.7 Methods of Obtaining Spectra
9.8 Windows and Limiting Bandwidth
9.9 Repetitive Waveforms
9.10 Incorrect Amplitudes at Borderlines
9.11 The Importance of Phase Information
10 Modulation
10.1 Mechanisms of Carrier Modulation
10.2 Relevance for Testing
10.3 Cepstrum
10.4 Deductions From Modulation
10.5 Random Disturbances
11 Correlation and Averaging
11.1 Introduction
11.2 Autocorrelation
11.3 Correlation
11.4 Time Averaging
11.5 Jitter
11.6 Controlled Sampling
11.7 Average or Variation
12 Transfer Functions
12.1 Time or Frequency
12.2 Coherence
12.3 Transmissibility
12.4 Identifying Resonances
12.5 Modeshapes
12.6 Modal Analysis
13 Signal Filtering and Improvement
13.1 Uses of Filtering
13.2 Filter Order
13.3 Compromises in Selection
13.4 Analogue or Digital
13.5 Bandpass or Resonant Filter
13.6 Bursts of Vibration
13.7 The Hilbert Transform
13.8 Line Elimination and Signal Regeneration
14 Condition Monitoring
14.1 The Problem
14.2 Frequency Analysis
14.3 Crest Factor and Kurtosis
14.4 Impulse Detection
14.5 Averaging
14.6 Line Elimination
15 Shock Testing
15.1 Introduction
15.2 Large Loads
15.3 High Accelerations
15.4 Measurement
16 Automation of Testing
16.1 Introduction
16.2 Relative Speed
16.3 Mode Shapes
16.4 Economics
16.5 Training
16.6 Non-Linearities
References
Bibliography
Index
Product details
- No. of pages: 176
- Language: English
- Copyright: © Butterworth-Heinemann 1989
- Published: April 5, 1989
- Imprint: Butterworth-Heinemann
- eBook ISBN: 9781483161631
About the Author
J. D. Smith
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