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Multi-Level Approaches of Fail Safe Techniques in Safety Critical Automotive Embedded Control Applications
Technical Paper
2011-26-0023
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SIAT 2011
Language:
English
Abstract
Electronics in vehicle is increasing continuously and a modern luxury vehicle has more than 50 ECUs present, out of which airbags, brakes, chassis control, engine control, and X-by-wire are safety critical systems. All safety critical automotive systems have been provided with fail-safe function. Fail-safe operation prevents improper system functioning or catastrophic degradation in the event of system malfunction. Failures may arise from incorrect specifications of the system, omissions in the safety requirements specification, hardware failures, software errors, human error, environmental influences or supply system voltage. In order to ensure the conformance in standardized manner, many international norms such as IEC 61508 and ISO 26262 are evolved. These safety requirements are implemented in hardware or software. In safety critical embedded systems, the fail safe functionality has to be implemented at multiple levels and in different architecture components such as components, ECU hardware, microcontroller, operating system and application software. This paper brings out the current multi-level approaches of fail-safe concept in these major architecture components and future trends in fail safe operations in automotive embedded systems. The designer needs to configure the fail safe architecture for the system appropriately depending on required safety integrity level for the system. In addition, C programming techniques, the development environment such as compilers, assemblers etc. and validation strategy are focused to take care of function safety requirements. This paper gives a perspective of fail safe mechanism at various architectural levels in safety critical systems and helps the designer to choose appropriate safety configuration for a given system to meet required safety targets.
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Citation
S, S., "Multi-Level Approaches of Fail Safe Techniques in Safety Critical Automotive Embedded Control Applications," SAE Technical Paper 2011-26-0023, 2011, https://doi.org/10.4271/2011-26-0023.Also In
References
- Shrud, M A et al. “Analysis and Simulation of a 42V Power System for Automotive Applications” presented at 44th Intl. Conf. on Universities Power Engineering Conference (UPEC) U.K. 1 4 Sep. 1-4 2009
- Leen, G Heffernan, D “Expanding Automotive Electronic Systems” IEEE Journal on Computers 35 1 88 93 Jan. 2002
- Bellotti, M “Functional Safety Software Development and ISO 26262” Presented at Third Automotive Software Process Improvement Network (SPIN) Workshop Pisa, Italia May 15 2008
- Mariani, R et al. “A Flexible Microcontroller Architecture for Fail-Safe and Fail-Operational Systems,” presented at 2nd High Performance and Embedded Architectures and Compilers HiPEAC Workshop on Design for Reliability Italy Jan 25-27 2010
- Zeller, Marc et al “Fail-Safe Data Management in Self-Healing Automotive Systems” 6 th Sixth Intl. Conf. on Autonomic and Autonomous Systems Mexico 24 29 Mar. 7-13 2010 http://10.1109/ICAS.2010.12
- Sundaram, P D'Ambrosio, J G “Controller Integrity in Automotive Failsafe System Architectures” SAE Paper No. 2006-01-0840 2006
- Mariani, R Fuhrmann, P “Comparing Fail-Safe Microcontroller Architectures in Light of IEC 61508” 22nd IEEE Intl. Symp. on Defect and Fault Tolerance in VLSI Systems Rome 123 131 Sep. 26-28 2007 http://10.1109/DFT.2007.63
- Mariani, R “Applying IEC 61508 to Integrated Circuits,” Published in Information Quarterly Magazine Online 42 47 19 6 2 2007 http://www.iqmagazineonline.com
- Vazquez, J C et al. “Built-In Aging Monitoring for Safety-Critical Applications” Presented at 15th IEEE Intl. On-Line Testing Symposium (IOLTS) Lisbon 9 14 June 24-26 2009 http://10.1109/IOLTS.2009.5195976
- Ryanf, C et al “Additional Communication System Services for Safety- Critical Applications” Presented at Irish Signals and Systems Conference (ISSC) Dublin Sep. 1-2 2005