This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Satisfying Design Constraints for Automotive Safety-Critical Systems
Technical Paper
2007-01-1483
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Leading automotive researchers are currently attempting to develop safety-critical automotive systems such as Steer-by-Wire (SBW), Brake-by-Wire (BBW) and Collision Avoidance Systems. These systems require a sound fault management infrastructure and a high reliability. However, this must be achieved at a low cost and with reduced lead time, while meeting other requirements such as for performance, size, weight, etc.
The traditional system design methodology that follows a preliminary design, analysis, appraisal and redesign pattern for automotive systems makes balancing contradicting design constraints difficult. Often all of the constraints are not met, and projects run over budget and time.
This paper describes a software tool that has been developed to assist engineers design safety-critical systems that satisfy constraints such as reliability and cost. Once fault management requirements are defined, the tool assists the user to design suitable fault detection and recovery schemes for their system by finding fault detection methods for components that will provide the required reliability within a given cost using constraint satisfaction methods.
The paper begins with the motivation behind the research and theory of constraint satisfaction. Next, the structure of the tool and the embedded design process is explained. The tool and the process are demonstrated using an Electronic Power Assisted Steering (EPAS) example.
Recommended Content
Authors
Citation
Herath, I., Roberts, C., Arvanitis, T., and Bold, A., "Satisfying Design Constraints for Automotive Safety-Critical Systems," SAE Technical Paper 2007-01-1483, 2007, https://doi.org/10.4271/2007-01-1483.Also In
SAE 2007 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V116-6; Published: 2008-08-15
Number: V116-6; Published: 2008-08-15
References
- Ed. “Cost still a top automaker concern,” Industrial Engineer 35 4 14 2003
- “Ford cutting thousands of us jobs,” 2005
- Belecheanu R. An invetigation of the design trade-offs in the automobile industry University of Nottingham 2003
- Blanchard B. Fabrycky W. System Engineering and Analysis Prentice Hall 1981
- Sommerville I. Software Engineering : A Practitioner's Approach London McGraw-Hill 2000
- Roberts C. “Systems engineering lecture notes,” 2003
- Leveson N. G. Safeware, system safety and computers Addison Wesley 1995
- Amberkar S. D'Ambrosio J. Murray B. “A system safety process for by-wire automotive systems,” SAE Journal of Electronic and Electrical Systems 2000
- Avizienis A. “Fault-tolerance: The survival attribute of digital systems,” Proceedings of the IEEE 66 10 1109 1125 1978
- Avizienis A. “Toward systematic design of fault-tolerant systems,” IEEE Computer 30 4 51 58 1997
- Rich E. Knight K. Artificial Intelligence McGraw-Hill inc. 1991
- Russell S. Norvig P. Artificial Intelligence : A modern approach, chap. 5 Prentice Hall 2003
- Kumar V. “Algorithms for constraint satisfaction problems: A survey,” AI magazine 13 1 32 44 1992
- Tsang E. Foundations of Constraint Satisfaction Academic Press 1995
- Tsang E. “A glimpse of constraint satisfaction,” Artificial Intelligence Review 13 215 277 1999
- Gertler J. Fault Detection and diagnosis in Engineering Systems, chap. 1 Marcel Dekker 1998
- Smith D. J. Simpson K. G. Functional Safety: A straightforward guide to applying IEC61508 and related standards Butterworth Heinemann 2 2004
- Charlwood M. Turner S. Worsell N. “A methodology for the assignment of safety integrity levels (sils) to safety-related control functions implemented by safety-related electrical, electronic and programmable electronic contorl systems of machines,” Health and Safety Executive 2004
- Smith D. J. Reliability, Maintainability and Risk Butterworth, Heinemann 5 1997
- Pradhan P. Fault Tolerant Computer System Design Prentice Hall PTR 1995