Functional Safety Assessment of a Generic Automated Lane Centering System and Related Foundational Vehicle Systems

This report describes research to assess the functional safety of a generic automated lane centering (ALC) system and three related foundational systems -- electric power steering (EPS), steer-by-wire (SbW), and conventional hydraulic braking (CHB). ALC systems are a key technology that supports vehicle automation by providing continuous lateral control to keep the vehicle within the travel lane. The studies of these systems follow the Concept Phase process in the ISO 26262 standard and applies Hazard and Operability study, functional failure mode effects analysis, and system-theoretic process analysis methods. The results of the individual analyses, including vehicle-level hazards, functional safety concepts, functional safety requirements (an output of the ISO 26262 process), and test scenarios, are contained in individual reports. This synthesis report examines the implications of analyzing foundational systems in the traditional non-automated case (“Automation Level 0”) and how results might need to be modified for a foundational system that acts as an actuator for a highly-automated driving system. It also describes human factors implications of an operator being not engaged as a possible foreseeable misuse case, particularly in SAE Automation Level 2. Finally, it defines architectural options and notes that some hazards can have different Automotive Safety Integrity Level (ASIL) levels depending on the malfunction and/or the automation level.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 95p

Subject/Index Terms

Filing Info

  • Accession Number: 01684995
  • Record Type: Publication
  • Report/Paper Numbers: DOT HS 812 572, DOT-VNTSC-NHTSA-17-01
  • Contract Numbers: DTNH22-14-V-00136; 51HS6CA100; 51HS6CA200
  • Files: HSL, NTL, TRIS, ATRI, USDOT
  • Created Date: Oct 12 2018 12:41PM