Technical Paper
Multi-Level Approaches of Fail Safe Techniques in Safety Critical Automotive Embedded Control Applications
2011-01-19
2011-26-0023
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.
