|Tipo di tesi||Tesi di laurea magistrale|
|Titolo||Progettazione e test di un safety case innovativo conforme ad ISO 26262|
|Titolo in inglese||Design and test of an ISO 26262-compliant novel safety case|
|Struttura||Dipartimento di Ingegneria "Enzo Ferrari"|
|Corso di studi||Advanced Automotive Engineering (D.M.270/04)|
|Data inizio appello||2021-10-21|
|Disponibilità||Accesso limitato: si può decidere quali file della tesi rendere accessibili. Disponibilità mixed (scegli questa opzione se vuoi rendere inaccessibili tutti i file della tesi o parte di essi)|
|Data di rilascio||2061-10-21|
Al giorno d'oggi, i veicoli stradali stanno sperimentando un aumento della complessità poiché molte funzionalità precedentemente fornite con soluzioni meccaniche sono ora fornite con sistemi elettronici programmabili. Questa complessità porta a maggiori rischi di lesioni o danni alla salute delle persone. La sicurezza funzionale (functional safety) identifica le condizioni potenzialmente pericolose che potrebbero causare danni e consente automaticamente azioni correttive per evitare o ridurre l'impatto di un incidente.
Nowadays, road vehicles are facing an increase in complexity since many features previously delivered with mechanical solutions are now delivered with programmable electronic systems. This complexity lead to increased risks of injury or damage to the health of people. Functional Safety identifies potentially dangerous conditions that could result in harm and automatically enables corrective actions to avoid or reduce the impact of an incident. In the automotive industry, the main tool to provide functional safety is the standard ISO 26262, published in 2011. This standard regulates the functional safety process of series production road vehicles, excluding mopeds. It defines a safety life cycle and provides guidelines for multiple activities and it defines the Automotive Safety Integrity Level (ASIL), a classification system used to establish safety requirements based on the probability and acceptability of harm. An important requirement of ISO 26262 is the safety case. The safety case is defined as a structured and well-reasoned argument supported by evidence that is intended to demonstrate in a clear, comprehensive and defensible way that a system is acceptably safe to operate in a particular context. However, in the 2011 version of the standard, the safety case was defined such that it could be a mere list of workproducts. From 2018, the standard was revised and one of the main changes was on the definition of the safety case. A safety case shall not only prove the application of a process, but also prove the trustfulness of each choice made in safety requirements derivation. Maserati adopts an internal ISO 26262-compliant process that requires the safety case as was defined in the 2011 version. In this framework, the main goal of the thesis is to improve the current safety case developing a novel template applicable to different items and vehicles. The discussion starts with the analysis of the state of the art regarding ISO 26262, the safety case and its most used development and writing methods, also referring to the pre-existing Maserati requirements. Moreover, there is an analysis of the role of the standard form a legal point of view that explains the evolution of product safety and producer’s liability: the development of increasingly innovative and complex products pushes legislation to rely more and more on technical regulations, such as ISO 26262. Following, the work is mainly focused on the development of procedures and guidelines for building the safety case for different systems. The novel template is built using a product-base approach supported by a process-based approach, i.e., it investigates the rationale behind each requirement and workproduct development and not only the application of the process. The template is presented systematically and multiple examples of safety case development are provided. In particular, electric torque vectoring and lights management systems are used to validate the template.