- posted
13 years ago

I have a basic question from ogata. i hope you know the answer.

consider the system defined by matrices:

A=[0 1 0;

0 0 1;

-6 -11 -6]

B=[0;

0;

1]

C=[c1 c2 c3]

Except for the obvious choice of c1=c2=c3, find an example set of c1,

c2, c3 that will make the system unobservable??

To check the observability, i have formed observ.matrix

Obsv=[C;

CA;

CA^2]

the determinant of the "Obsv" must be nonzero.

and it must be full rank.

When i formed the "Obsv" matrix, such complicated matrix was become.

Do you have any suggestions for c1, c2 and c3?

Thank you