Diagnosis and FTC by Prof. Blanke [pdf] - NTNU

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Diagnosis and Fault-tolerant Control
Chapter 1, pp 1-23
• Faults and fault-tolerance:
• A fault is a deviation of the system structure or system
parameters from the nominal situation (actuator blocks, loss of
sensor, disconnection of system component)
• A failure is an event that prevents a system to perform a
required function.
• Parameters are alowed to vary within their specified range
System behaviour
• System behaviour is a subset of all possible combinations of
input and output signals.
Let a static system be
yt () = kut s ()
The behaviour is the set of all I/O pairs is given by
B
= { ( uy , )| y= ku s }
If the system is dynamic, B⊂ U× Y
Mogens Blanke – Spring 2006
Mogens Blanke – Spring 2006
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