Driver assistance systems have become increasingly important in the motor vehicle industry, as they assist in handling critical driving situations and help minimize the risk of accidents. In addition to ABS, ACC and cruise control there is a multitude of other systems which assist the driver like for example lane keeping. In addition to rising complexity of customer requirements, the aspects of functional safety are becoming more and more important. This poses new challenges for developers to design and realize complex electronic systems, at the same time avoiding damage to persons or the system environment due to failures or malfunctions. To finish projects in a timely manner and within cost limits the need for efficient and structured methods evolves. Using the presented method of model-based design to implement safety-related systems offers some fundamental advantages: A consistent and efficient development process Cost- and quality advantages A better understanding for other parties involved e.g. in reviews because of domain-specific representations Especially since the new standards have been developed with a model-based design approach in mind, it is quite easy to integrate it into the overall activities of the standards. It also facilitates implementation of the traceability required in the software development. A more serious challenge in terms of complexity is the demand for back-to-back testing between model and code for higher ASIL. Here a smart and sophisticated architectural design combined with automated testing brings long term benefits. Beyond this, the qualification of the tools used to develop safety-related features is required. For this, classification and qualification according to ISO DIS 26262 has been shown. By dividing classification and qualification into a generic and a project specific part, as well as establishing a safety culture of accurate tool handling, the complexity can be reduced in the long run.
Model-based software development and functional safety. With focus on commercial vehicles
2010
10 Seiten, 1 Bild, 5 Tabellen, 4 Quellen
Aufsatz (Konferenz)
Englisch
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