User`s guide

ctrb
11-44
Limitations The calculation of Co may be ill-conditioned with respect to inversion. An
indication of this can be seen f rom this simple example.
This pair is controllable if but if , where eps is the relative
machine precision.
ctrb(A,B) returns
which is not full rank. For cases like these, it is better to determine the
controllability of a system using
ctrbf.
See Also ctrbf Compute the co ntrollability staircase form
obsv Compute the observab ility matrix
A
1 δ
01
,= B
1
δ
=
δ
0
≠δ
eps
<
BAB
11
δδ
=