Fault recovery in process control
Date
2015-02-05
Authors
Horn, Timothy Andrew
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Abstract
Fault Recovery in process control requires effective
fault detection, diagnosis and recovery schemes, and a
fault-tolPi-ant system design.
Fault detection and diagnosis involves creating a
realistic model of the process, and using this model to
analyse for fault conditions. The fault detection
principles include feature extraction and pattern
recognition, and analogue value limits and rate cf
change limits.
Fault recovery scheme? cover the realisation of
redundancy ana back-up sub-systems, and state
restoration techniques in the form of complete
shutdowns, backward and forward recovery to a safe
operating state.
System design concepts include for the development of
process control systems towards *hierarchical, level based
distribution of functions. The level-based
discussion is used as the basis for effective fault tolerant
system design.
Two case studies are included to show how fault recovery
schemes were effected in a single process computer and
in a distributed control system.
Abstract