"Without doubt the best modern and up-to-date text on the topic, wirtten by one of the world leading experts in the field. Should be on the desk of any practitioner or researcher involved in the field of Machine Condition Monitoring" Simon Braun, Israel Institute of Technology Explaining complex ideas in an easy to understand way, Vibration-based Condition Monitoring provides a comprehensive survey of the application of vibration analysis to the condition monitoring of machines. Reflecting the natural progression of these systems by presenting the fundamental material and then moving onto detection, diagnosis and prognosis, Randall presents classic and state-of-the-art research results that cover vibration signals from rotating and reciprocating machines; basic signal processing techniques; fault detection; diagnostic techniques, and prognostics.
Developed out of notes for a course in machine condition monitoring given by Robert Bond Randall over ten years at the University of New South Wales, Vibration-based Condition Monitoring: Industrial, Aerospace and Automotive Applications is essential reading for graduate and postgraduate students/ researchers in machine condition monitoring and diagnostics as well as condition monitoring practitioners and machine manufacturers who want to include a machine monitoring service with their product.
- Includes a number of exercises for each chapter, many based on Matlab, to illustrate basic points as well as to facilitate the use of the book as a textbook for courses in the topic.
- Accompanied by a website www.wiley.com/go/randall housing exercises along with data sets and implementation code in Matlab for some of the methods as well as other pedagogical aids.
- Authored by an internationally recognised authority in the area of condition monitoring.
Author(s): Robert Bond Randall
Publisher: Wiley
Year: 2011
Language: English
Pages: 309
Tags: Механика;Теория колебаний;
VIBRATION-BASED
CONDITION MONITORING......Page 3
Contents......Page 9
Foreword......Page 13
About the Author......Page 15
Preface......Page 17
1.1 Introduction......Page 21
1.2 Maintenance Strategies......Page 22
1.3.1 Vibration Analysis......Page 23
1.3.2 Oil Analysis......Page 24
1.3.4 Thermography......Page 25
1.4.2 Permanent vs Intermittent Monitoring......Page 26
1.5.1 Absolute vs Relative Vibration Measurement......Page 28
1.5.2 Proximity Probes......Page 29
1.5.3 Velocity Transducers......Page 32
1.5.4 Accelerometers......Page 33
1.5.5 Dual Vibration Probes......Page 37
1.6 Torsional Vibration Transducers......Page 38
1.6.2 Torsional Laser Vibrometers......Page 39
1.7 Condition Monitoring – the Basic Problem......Page 40
References......Page 43
2.1 Signal Classification......Page 45
2.1.1 Stationary Deterministic Signals......Page 48
2.1.2 Stationary Random Signals......Page 49
2.2 Signals Generated by Rotating Machines......Page 50
2.2.1 Low Shaft Orders and Subharmonics......Page 51
2.2.2 Vibrations from Gears......Page 60
2.2.3 Rolling Element Bearings......Page 67
2.2.5 Electrical Machines......Page 72
2.3 Signals Generated by Reciprocating Machines......Page 76
2.3.1 Time–Frequency Diagrams......Page 77
2.3.2 Torsional Vibrations......Page 80
References......Page 81
3.1 Probability Distribution and Density......Page 83
3.2.1 Fourier Series......Page 86
3.2.3 Sampled Time Signals......Page 89
3.2.4 The Discrete Fourier Transform......Page 91
3.2.5 The Fast Fourier Transform......Page 92
3.2.6 Convolution and the Convolution Theorem......Page 94
3.2.7 Zoom FFT......Page 104
3.2.8 Practical FFT Analysis......Page 106
3.3.1 Hilbert Transform......Page 115
3.3.2 Demodulation......Page 116
3.4 Cepstrum Analysis......Page 123
3.4.1 Terminology and Definitions......Page 125
3.4.2 Typical Applications of the Cepstrum......Page 128
3.4.3 Practical Considerations with the Cepstrum......Page 130
3.5 Digital Filtering......Page 134
3.5.1 Realization of Digital Filters......Page 135
3.6.1 Order Tracking......Page 137
3.6.2 Time Synchronous Averaging......Page 140
3.6.3 Linear Prediction......Page 142
3.6.5 Self-adaptive Noise Cancellation......Page 145
3.6.6 Discrete/Random Separation DRS......Page 148
3.7 Time–Frequency Analysis......Page 149
3.7.2 The Wigner–Ville Distribution......Page 150
3.7.3 Wavelet Analysis......Page 151
3.8 Cyclostationary Analysis and Spectral Correlation......Page 154
3.8.1 Spectral Correlation......Page 155
3.8.2 Spectral Correlation and Envelope Spectrum......Page 158
References......Page 159
4.2.1 Vibration Criteria......Page 163
4.2.2 Use of Frequency Spectra......Page 168
4.2.3 CPB Spectrum Comparison......Page 169
4.3.1 Vibration Criteria for Reciprocating Machines......Page 175
4.3.2 Time–Frequency Diagrams......Page 176
4.3.3 Torsional Vibration......Page 180
References......Page 185
5.1.1 Examples of Cursor Application......Page 187
5.2 Minimum Entropy Deconvolution......Page 189
5.3.1 SK– Definition and Calculation......Page 192
5.3.2 Use of SK as a Filter......Page 194
5.3.3 The Kurtogram......Page 196
5.4 Gear Diagnostics......Page 198
5.4.1 Techniques Based on the TSA......Page 199
5.4.2 Transmission Error as a Diagnostic Tool......Page 201
5.4.3 Cepstrum Analysis......Page 207
5.4.4 Separation of Spalls and Cracks......Page 216
5.4.5 Diagnostics of Gears with Varying Speed and Load......Page 219
5.5 Rolling Element Bearing Diagnostics......Page 220
5.5.1 Signal Models for Bearing Faults......Page 223
5.5.2 A Semi-automated Bearing Diagnostic Procedure......Page 227
5.6.1 Time–Frequency Methods......Page 234
5.6.2 Cylinder Pressure Identification......Page 237
References......Page 245
6.2 Trend Analysis......Page 249
6.2.1 Trending of Simple Parameters......Page 250
6.2.2 Trending of ‘Impulsiveness’......Page 254
6.3 Determination of Spall Size in Bearings......Page 258
6.4 Advanced Prognostics......Page 263
6.4.1 Physics-Based Models......Page 264
6.4.2 Data-Driven Models......Page 265
6.4.3 Hybrid Models......Page 267
References......Page 270
A.1.1 Exam Questions......Page 273
A.2.1 Exam Questions......Page 274
A.3.1 Tutorial and Exam Questions......Page 276
A.4.1 Tutorial and Exam Questions......Page 290
A.4.2 Assignment......Page 293
A.5.1 Tutorial and Exam Questions......Page 295
A.5.2 Assignments......Page 300
A.6.1 Tutorial and Exam Questions......Page 304
Index......Page 305
