Performing Safety Evaluation on Detailed Hardware Level according to ISO 26262 2013-01-0182
Electronic design on detailed hardware level for automotive safety-related systems requires evaluation of the hardware architecture to cope with random hardware failures. The international standard ISO 26262 - functional safety for road vehicles - claims two methods: hardware architectural metrics and evaluation of safety goal violations as a probabilistic approach. Although the utilization of these analyses is required, annotations of failure data in combination with performing evaluation of a preliminary hardware architecture using deposited failure data is not supported in an integrated model-based development environment.
To overcome these inconveniences, we analyzed the ISO 26262, in particular Part 5 for product development at the hardware level, to provide both, meta-model for failure description of detailed hardware and performing evaluation of the hardware architecture. This UML-compliant meta-model expands existing EAST-ADL2 constructs. We implemented our concepts in a model-based architecture description language for large scaled electric and electronic architectures. To deposit specific failure rates and modes, we provide a library concept for hardware component types. Besides modeling schematics using the type library, an automatic preparation for characterization of safety-related hardware components is provided. To perform quantified analysis, we acquire relevant failure data using model queries and a metric framework to implement the equations for hardware evaluation according to ISO 26262 Part 5. Detailed results and compliance with target values including dedicated measures are documented in generated reports.
Citation: Adler, N., Otten, S., Cuenot, P., and Müller-Glaser, K., "Performing Safety Evaluation on Detailed Hardware Level according to ISO 26262," SAE Int. J. Passeng. Cars – Electron. Electr. Syst. 6(1):102-113, 2013, https://doi.org/10.4271/2013-01-0182. Download Citation
Nico Adler, Stefan Otten, Philippe Cuenot, Klaus Müller-Glaser
FZI Research Center for Information Tech, Continental Automotive France, Karlsruhe Institute of Technology
SAE 2013 World Congress & Exhibition
SAE International Journal of Passenger Cars - Electronic and Electrical Systems-V122-7, SAE International Journal of Passenger Cars - Electronic and Electrical Systems-V122-7EJ