ISO26262-Compliant Developmentof a High Dependable Automotive Powertrain Item

In the automotive domain, the electrical and electronic items are playing day after day a more central role. Since most of these units are in charge of safety-relevant functionalities, a strict development process is required. The ISO26262 automotive functional safety standard describes a mandatory process to design, validate and verify item designs. The aim of this work is to describe a suitable way to overcome some safety life cycle issues. The description starts from the concept phase, with the Hazard Analysis and Risk Assessment, in where the safety goals are defined, and an Automotive Safety Integrated Level is assigned to each of them. After that preliminary phase, it will be shown how it is possible to check the reliability of the obtained hardware design keeping into account the failure detection and mitigation capabilities of both hardware and software. To achieve this goal, a simulation-based Failure Mode and Effect Analysis assessment technique is applied to assess the hardware design’s possible sources of failures and to analyse detection, isolation and mitigation capabilities. To achieve this result, the hardware model and the embedded software have been implemented using the Model-Based Software Design approach. This approach has been demonstrated on an electrical vehicle powertrain design.