Abstract
Existing automotive Hazard Analysis and Risk Assessment (HARA) process as discussed by the international standard ISO 26262 is static in nature. While the standard describes a systematic process to incorporate functional safety in the development process of Electrical & Electronic (E/E) systems, it fails to address the needs of Advanced Driver Assistance Systems (ADAS) and Automated Driving (AD) systems. In order to ensure the safety of ADAS and AD systems, it is important to incorporate the changing nature of interactions between the system and the environment, in the safety analysis process for ADAS and AD systems. In this paper, the authors argue the need for a dynamic approach for automotive safety analysis by adapting the tactical safety for ADAS and AD systems depending on the real-time operational capability and real-time ASIL (Automotive Safety Integrity Level) rating of a situation, and discuss a framework for this process. The novelty and therefore contribution of this paper lies in the proposed ASIL inspired dynamic tactical safety framework, which evaluates the severity, controllability and exposure ratings in real-time based on the real time values of the various vehicle and environment parameters. These ratings are used to assign a real-time ASIL value which is used to determine the tactical decisions in order to lower the ASIL value in real-time by altering the functional (operational) capability of the system. Furthermore, the framework is explained with the help of a case study based on a combined Adaptive Cruise Control (ACC) and Autonomous Emergency Braking (AEB) system.
| Original language | English |
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| Title of host publication | 2017 IEEE 20th International Conference on Intelligent Transportation Systems, ITSC 2017 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Number of pages | 6 |
| ISBN (Electronic) | 9781538615256 |
| DOIs | |
| Publication status | Published - 14 Mar 2018 |
| Externally published | Yes |
| Event | 20th IEEE International Conference on Intelligent Transportation Systems, ITSC 2017 - Yokohama, Kanagawa, Japan Duration: 16 Oct 2017 → 19 Oct 2017 |
Publication series
| Name | IEEE Conference on Intelligent Transportation Systems, Proceedings, ITSC |
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| Volume | 2018-March |
Conference
| Conference | 20th IEEE International Conference on Intelligent Transportation Systems, ITSC 2017 |
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| Country/Territory | Japan |
| City | Yokohama, Kanagawa |
| Period | 16/10/17 → 19/10/17 |
Funding
This research is sponsored by WMG, University of Warwick, UK, WMG centre HVM Catapult and the Swedish government agency for innovation systems (VINNOVA) in the ESPLANADE project (ref 2016-04268). ACKNOWLEDGMENT The authors would like to thank WMG, University of Warwick, UK and the WMG centre HVM Catapult for supporting this research. WMG hosts one of the seven centres that together comprise the High Value Manufacturing Catapult in the UK. This research has also been supported by the Swedish government agency for innovation systems (VINNOVA) in the ESPLANADE project (ref 2016-04268). The authors would also like to thank Anders Sandberg for his valuable contribution to this manuscript.
Keywords
- HARA
- Hazards
- ISO 26262
- Tactical decisions
ASJC Scopus subject areas
- Automotive Engineering
- Mechanical Engineering
- Computer Science Applications