Basic Single-Microcontroller Monitoring Concept for Safety Critical Systems

Electronic Control Units of safety critical systems require constant monitoring of the hardware to be able to bring the system to a safe state if any hardware defects or malfunctions are detected. This monitoring includes memory checking, peripheral checking as well as checking the main processor core. However, checking the processor core is difficult because it cannot be guaranteed that the error will be properly detected if the monitor function is running on a processing system which is malfunctioning. To circumvent this issue, several previously presented monitoring concepts (e.g., SAE#2006-01-0840) employ a second external microprocessor to communicate with the main processor to check its integrity. The addition of a second microcontroller and the associated support circuitry that is required adds to the overall costs of the ECU, increases the size and creates significant system complexity.

• Record URL:
  • https://doi.org/10.4271/2007-01-1488
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • Abstract reprinted with permission of SAE International.
• Authors:
  • Schneider, Rolf
  • Kalhammer, Manfred
  • Eberhard, Denis
  • Brewerton, Simon
• Conference:
  • SAE World Congress & Exhibition
  • Location: Detroit Michigan, United States
  • Date: 2008-4-14 to 2008-4-17
• Publication Date: 2007-4-16

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Serial:
  • SAE Technical Paper
  • Publisher: Society of Automotive Engineers (SAE)
  • ISSN: 0148-7191
  • EISSN: 2688-3627
  • Serial URL: http://papers.sae.org/

Subject/Index Terms

• TRT Terms: Automatic steering control; Braking; Computers; Defects; Electronic controllers; Microprocessors; Monitoring; Vehicle safety
• Subject Areas: Design; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01768695
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 2007-01-1488
• Files: TRIS, SAE
• Created Date: Mar 29 2021 12:06PM