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Safety of Computer Architectures

ISBN: 978-1-84821-197-1
Hardcover
512 pages
August 2010, Wiley-ISTE
List Price: US $165.00
Government Price: US $113.88
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Safety of Computer Architectures (184821197X) cover image

Introduction xiii

Chapter 1. Principles 1
Jean-Louis BOULANGER

1.1. Introduction 1

1.2. Presentation of the basic concepts: faults, errors and failures 1

1.3. Safe and/or available architecture 7

1.4. Resetting a processing unit 7

1.5. Overview of safety techniques 8

1.6. Conclusion 45

1.7. Bibliography 45

Chapter 2. Railway Safety Architecture 47
Jean-Louis BOULANGER

2.1. Introduction 47

2.2. Coded secure processor 47

2.3. Other applications 53

2.4. Regulatory and normative context 60

2.5. Conclusion 66

2.6. Bibliography 66

Chapter 3. From the Coded Uniprocessor to 2oo3 69
Gilles LEGOFF and Christophe GIRARD

3.1. Introduction 69

3.2. From the uniprocessor to the dual processor with voter 71

3.3. CSD: available safety computer 80

3.4. DIVA evolutions 93

3.5. New needs and possible solutions 99

3.6. Conclusion 101

3.7. Assessment of installations 102

3.8. Bibliography 103

Chapter 4. Designing a Computerized Interlocking Module: a Key Component of Computer-Based Signal Boxes Designed by the SNCF 105
Marc ANTONI

4.1. Introduction 105

4.2. Issues 107

4.3. Railway safety: fundamental notions 116

4.4. Development of the computerized interlocking module 124

4.5. Conclusion 145

4.6. Bibliography 147

Chapter 5. Command Control of Railway Signaling Safety: Safety at Lower Cost 149
Daniel DRAGO

5.1. Introduction 149

5.2. A safety coffee machine 149

5.3. History of the PIPC 150

5.4. The concept basis 155

5.5. Postulates for safety requirements 157

5.6. Description of the PIPC architecture7 159

5.7. Description of availability principles 173

5.8. Software architecture 176

5.9. Protection against causes of common failure 186

5.10. Probabilistic modeling 188

5.11. Summary of safety concepts 194

5.12. Conclusion 197

5.13. Bibliography 198

Chapter 6. Dependable Avionics Architectures: Example of a Fly-by-Wire system 199
Pascal TRAVERSE, Christine BEZARD, Jean-Michel CAMUS, Isabelle LACAZE, Hervé LEBERRE, Patrick RINGEARD and Jean SOUYRIS

6.1. Introduction 199

6.2. System breakdowns due to physical failures 205

6.3. Manufacturing and design errors 215

6.4. Specific risks 223

6.5. Human factors in the development of flight controls 225

6.6. Conclusion 229

6.7. Bibliography 229

Chapter 7. Space Applications 233
Jean-Paul BLANQUART and Philippe MIRAMONT

7.1. Introduction 233

7.2. Space system 233

7.3. Context and statutory obligation 237

7.4. Specific needs 243

7.5. Launchers: the Ariane 5 example 252

7.6. Satellite architecture 281

7.7. Orbital transport: ATV example 292

7.8. Summary and conclusions 302

7.9. Bibliography 304

Chapter 8. Methods and Calculations Relative to “Safety Instrumented Systems” at TOTAL 307
Yassine CHAABI and Jean-Pierre SIGNORET

8.1. Introduction 307

8.2. Specific problems to be taken into account  308

8.3. Example 1: system in 2/3 modeled by fault trees 322

8.4. Example 2: 2/3 system modeled by the stochastic Petri net 328

8.5. Other considerations regarding HIPS 333

8.6. Conclusion 342

8.7. Bibliography 343

Chapter 9. Securing Automobile Architectures 345
David LIAIGRE

9.1. Context 345

9.2. More environmentally-friendly vehicles involving more embedded electronics 347

9.3. Mastering the complexity of electronic systems 348

9.4. Security concepts in the automotive field 350

9.5. Which security concepts for which security levels of the ISO 26262 standard? 364

9.6. Conclusion 376

9.7. Bibliography 377

Chapter 10. SIS in Industry 379
Grégory BUCHHEIT and Olaf MALASSE

10.1. Introduction 379

10.2. Safety loop structure 384

10.3. Constraints and requirements of the application 407

10.4. Analysis of a safety loop 413

10.5. Conclusion 423

10.6. Bibliography 424

Chapter 11. A High-Availability Safety Computer 425
Sylvain BARO

11.1. Introduction 425

11.2. Safety computer 426

11.3. Applicative redundancy 433

11.4. Integrated redundancy 433

11.5. Conclusion 443

11.6. Bibliography 446

Chapter 12. Safety System for the Protection of Personnel in the CERN Large Hadron Collider 447
Pierre NININ, Silvia GRAU, Tomasz LADZINSKI and Francesco VALENTINI

12.1. Introduction 447

12.2. LACS 450

12.3. LASS 452

12.4. Functional safety methodology 459

12.5. Test strategy 466

12.6. Feedback 472

12.7. Conclusions 473

12.8. Bibliography 474

Glossary 477

List of Authors 485

Index 487

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