 | Cherian S. Investigation on the reliability and safety of polymer optical fiber data network for avionic applications: Diss. zur … Dr.-Ing. / Deutsches Zentrum für Luft- und Raumfahrt, Institut für Flugfuhrung, Braunschweig. - Köln: DLR, 2017. - XIX,165 S. : ill., tab. - (Forschungsbericht; 2017-21). - Res. also Germ. - Bibliogr.: S.156-161. - ISSN 1434-8454
Шифр: (Pr 1120/2017-21) 02
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Acknowledgments ............................................... iii
Abstract ........................................................ v
Kurzfassung ................................................... vii
List of Figures .............................................. xiii
List of Tables ................................................ xvi
Nomenclature ................................................. xvii
Introduction .................................................... 1
1 Fiber optics for avionics : benefits and issues ............ 6
1.1 Introduction to fly-by-light systems ....................... 6
1.2 Reliability issues of Fly-By-Light ........................ 13
1.3 Research Methodology ...................................... 17
1.4 An Introduction to the polymer fiber ...................... 18
1.4.1 Comparative study: copper wire, silica fiber and
polymer fiber ...................................... 18
1.4.2 Polymer optical fiber link and components .......... 20
1.5 Conclusion ................................................ 24
2 Characterization of POF components ........................ 26
2.1 Introduction .............................................. 26
2.2 Characterization of polymer optical fiber link ............ 27
2.3 Characterization of connector/splice ...................... 41
2.4 Maintenance tools for POF ................................. 48
2.5 Conclusion ................................................ 49
3 Requirements: Definitions and Deviations .................. 51
3.1 Introduction .............................................. 51
3.2 General fiber optic data transmission requirements ........ 52
3.3 A study on the existing standards: deviations and
modifications ............................................. 53
3.3.1 Optical cable ...................................... 54
3.3.2 Connector .......................................... 59
3.3.3 Splices ............................................ 62
3.3.4 Environmental requirements for fiber optic
components ......................................... 64
3.3.5 Mechanical requirements ............................ 69
3.4 Conclusion ................................................ 75
4 System Performance Analysis: Limiting conditions in
design .................................................... 76
4.1 Introduction .............................................. 76
4.2 Overview of aircraft data networks ........................ 76
4.3 Power budget analysis ..................................... 79
4.3.1 Statistical power budget analysis .................. 81
4.4 Link loss budget measurement .............................. 86
4.4.1 Transceiver ........................................ 86
4.4.2 Fiber .............................................. 87
4.4.3 Connectors ......................................... 87
4.4.4 Bit Error Rate Measurement and Results ............. 89
4.4.5 Design and development of automated variable
optical attenuator ................................. 95
4.5 Conclusion ................................................ 99
5 Harsh environmental measurement methods and validation ..... 101
5.1 Introduction ............................................. 101
5.2 Measurement definition and procedure ..................... 101
5.3 Environmental measurements ............................... 105
5.3.1 Temperature cycling test .......................... 105
5.3.2 Temperature-humidity cycling test ................. 111
5.4 Mechanical test .......................................... 112
5.4.1 Vibration measurement ............................. 112
5.5 Development of test bench ................................ 122
5.5.1 Concept ........................................... 122
5.5.2 Construction ...................................... 123
5.6 Results and Discussion ................................... 126
5.6.1 Performance parameters ............................ 126
5.6.2 Environmental measurement results ................. 133
5.7 Conclusion ............................................... 145
6 Vistas and challenges of the POF for airborne
applications ............................................. 147
6.1 Introduction ............................................. 147
6.2 Different types of POF ................................... 147
6.3 Future scope of the POF in aircraft system ............... 148
7 Conclusion ............................................... 152
Bibliography .................................................. 155
Bibliography .................................................. 156
A. Test bench construction .................................. 162
A.1 Drawings of parts of the test bench ...................... 162
A.1.1 Stress analysis of connector adapter .............. 164
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