Mechanical Vibrations of Electric Machines-Theory overview with sample application - Pękosławski Bartosz, Wenerski Maciej, Tomala Radosław

Mechanical Vibrations of Electric Machines-Theory overview with sample application za 66.49 zł

Cena: 66.49 zł
Sklep: lideria.pl
Kup teraz Mechanical Vibrations of Electric Machines-Theory overview with sample application za 66.49 zł w księgarni lideria.pl
Wydawca: Publishing Self
Kategoria: Ebooki i Audiobooki / Nauki ścisłe, przyrodnicze i technika
ISBN: e777a576cc2f5e8cd8fe182f710d0a33
Waga: b/d kg
Rok wydania: 2020

This book describes mechanical vibrations phenomenon in electric machines. The Reader is provided with the information about physical basis and mathematical description of this phenomenon. Book also presents general overview of measurement methods and sample application of measurement module.

Spis treści

Chapter I (by: Radosław Tomala, M.Sc.) 
Vibration measurement issue  in supervision of technical  condition of machines - 5
1. Mechanical vibrations - 6
1.1 Physical basis of the phenomenon – occurrence of mechanical vibrations - 6
1.2 Mathematical description of mechanical vibrations - 11
1.3 Methods for measurement of mechanical vibrations - 14
2. Monitoring and diagnostics of a technical condition of machines basing  on  measurement of mechanical vibrations - 16
2.1 Relation between machine technical condition and vibration level - 16
2.2 Application examples - 19
2.3 Benefits and costs of application of monitoring and diagnostic system in a fossil-fuel power plant - 21

Chapter II (by: Maciej Wenerski, M.Sc.) 
System characteristics - 23
1. General classification of systems for measurement of mechanical vibrations - 24
2. Advantages of a distributed stationary system - 28
3. Assumptions for the designed system - 31
3.1 General assumptions – system structure and functions - 31
3.2 Operation modes of the system - 32
3.3 Environmental conditions of the system functioning - 33

Chapter III (by: Bartosz Pękosławski, Ph.D.) 
Measurement module - 36
1. Design assumptions for measurement module - 37
1.1 - Amplitude and frequency of measured vibrations - 37
1.2 - Measurement resolution - 38
1.3 - Additional assumptions - 39
2. Structure of measurement module – functional blocks - 41
3. Block of accelerometers - 44
3.1 Types of accelerometers - 44
3.2 Piezoelectric accelerometers - 45
3.2.1 Structure and principle of operation - 45
3.2.2 Parameters of applied accelerometer - 46
3.3 Micromachined capacitive accelerometers - 47
3.3.1 Structure and principle of operation - 47
3.3.2 Choice of accelerometer - 50
4. Signal conditioning block - 52
4.1 Configuration of signal conditioning block - 52
4.2 Programmable gain amplifier - 53
4.2.1 Types of programmable gain amplifiers - 53
4.2.2 Required parameters of programmable gain amplifier - 55
4.2.3 Realisation of programmable gain amplifier - 56
4.3 Antialiasing filter - 60
4.3.1 Aliasing phenomenon - 60
4.3.2 Types of analogue low-pass filters - 61
4.3.3 Design of antialiasing filter - 64
4.4 Signal offset translation - 66
4.5 Calibration of analogue channel - 68
4.6 Limiting of input and output voltages - 69
5. Measurement data conversion and storage block - 71
5.1 Analogue-to-digital conversion - 71
5.1.1 Types of analogue-to-digital converters - 71
5.1.2 Parameters of applied analogue-to-digital converter - 76
5.2 Data buffer - 79
6. Control block - 81
6.1 Control of measurement systems - 81
6.2 Microconverter characteristics - 82
6.3 Interconnection with data buffer and communication controller - 85
6.4 Control of signal-conditioning block - 88
6.4.1 Serial Peripheral Interface - 88
6.4.2 Realisation and scope of control - 90
6.5 Control of conversion of measurement data - 93
6.5.1 Control of acquisition time - 93
6.5.2 Control of analogue-to-digital converter - 95
6.6 System of interrupts - 97
6.7 Algorithm of the program controlling module operation - 99
6.8 Microconverter programming - 104
7. Power supply block - 106
7.1 Supply voltage regulation and conversion - 106
7.1.1 Required levels of supply voltages and current capabilities - 106
7.1.2 Switch mode voltage regulators - 107
7.1.3 Linear voltage regulators and reference voltage sources - 111
7.2 Power supply of piezoelectric accelerometers - 114
7.2.1 Requirements for the power supply of piezoelectric accelerometers - 114
7.2.2 Realisation of constant current source - 115

Summary - 118

Appendices - 121

Bibliography - 131