Tolerating failures of continuous-valued sensors

  • Authors:
  • Keith Marzullo

  • Affiliations:
  • Cornell University

  • Venue:
  • ACM Transactions on Computer Systems (TOCS)
  • Year:
  • 1990

Quantified Score

Hi-index 0.01

Visualization

Abstract

One aspect of fault-tolerance in process control programs is the ability to tolerate sensor failure. This paper presents a methodology for transforming a process control program that cannot tolerate sensor failures into one that can. Issues addressed include modifying specifications in order to accommodate uncertainty in sensor values and averaging sensor values in a fault-tolerant manner. In addition, a hierarchy of sensor failure models is identified, and both the attainable accuracy and the run-time complexity of sensor averaging with respect to this hierarchy is discussed.