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

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Properties of the faulty system
A salient feature of SaToo is the ability to analyze the faulty
system with several simultaneous faults present.
When f1 and f2 have happened, what if f3 is a fault in a1, a2, a3, ..
f1
a3
f2
m5
m6
m7
a
1
i
i
i
a
2
i
i
i
a
3
-
-
-
b
1
i
0
i
b
2
i
0
i
b
3
d
d
d
Essentials from the structure graph
c
1
d
i
d
Auto-generated parity relations for diagnosis !
Controlability (structural): are unknown variables
reachable from input variables ?
Monitorability: are constraints reachable from
measured variables ?
c
2
d
d
d
f3
c
3
d
d
d
m
1
d
0
d
m
2
i
i
i
m
3
i
0
i
m
4
i
i
i
m
5
-
0
0
m
6
d
-
d
m
7
0
d
-
#
6
6
6
Mogens Blanke – Spring 2006
Detectability: does the constraint enter into any of the
parity relations ?
Isolability: is there a unique signature in the set of
parity relations by a particular fault (violation of
particular constraint) ?
Mogens Blanke – Spring 2006
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