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

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83<br />

84<br />

Properties of nominal system<br />

a1<br />

i<br />

a2<br />

i<br />

a3<br />

i<br />

b1<br />

i<br />

b2<br />

i<br />

b3<br />

i<br />

c1<br />

i<br />

c2<br />

d<br />

f1<br />

c3<br />

d<br />

In nominal mode, which faults are detectable, which are isolable ?<br />

When is it safe to continue operation ?<br />

Given: One or more faults/failures are present<br />

Determine:<br />

Is it safe to continue operation with this/these fault(s)<br />

present ?<br />

Are there any critical faults that can not be detected ?<br />

m<br />

1<br />

d<br />

m<br />

2<br />

i<br />

m<br />

3<br />

Could further faults be accommodated ?<br />

Solution: analysis of the structure graph<br />

i<br />

m<br />

4<br />

i<br />

m<br />

5<br />

i<br />

m<br />

6<br />

d<br />

m<br />

7<br />

i<br />

8<br />

Mogens <strong>Blanke</strong> – Spring 2006<br />

Mogens <strong>Blanke</strong> – Spring 2006<br />

42

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