Identifying Effective STPA Control Structures to Characterize SOTIF Areas 1,2,3, and 4 in Automated Vehicles

Developing an automated driving system (ADS) for an automated vehicle with a sufficient level of safety has turned out to be a much more difficult problem than anticipated by the industry. The challenges are multiple, for example the existence of a very large number of critical scenarios that would require testing vehicles for billions of miles to guarantee safety. In this paper the authors propose using System Theoretic Process Analysis, STPA, to characterize SOTIF areas 1, 2, 3, and 4 for SAE automation levels 3 and 4. A key challenge of STPA is the identification of an appropriate dynamic control structure that is efficient for the purpose at hand. The authors propose a control structure built around the decision hierarchy of strategical, tactical, and operational decisions, used to structure an ADS including its relations to the user, the environment, and all other traffic actors. More specifically, they show how an analysis based on this control structures at the strategic, tactical, and operational levels can be used to identify safe and unsafe control actions (UCAs) in known scenarios

Language

  • English

Media Info

  • Media Type: Web
  • Features: Figures; References;
  • Pagination: 9p
  • Monograph Title: 27th International Technical Conference on the Enhanced Safety of Vehicles (ESV): Enhanced and Equitable Vehicle Safety for All: Toward the Next 50 Years

Subject/Index Terms

Filing Info

  • Accession Number: 01887619
  • Record Type: Publication
  • Report/Paper Numbers: Paper Number 23-0019
  • Files: TRIS, ATRI, USDOT
  • Created Date: Jul 17 2023 2:44PM