Re: [python-control-discuss] pole placement problem

[Ryan K. <rk...@si...>]

So, my system is in controllable canonical form.  To my limited
understanding of modern control, that should mean it is controllable,
right?  But this looks bad:

In [65]: numpy.linalg.matrix_rank(A)
Out[65]: 9

In [62]: test = control.ctrb(A,B)

In [63]: numpy.linalg.matrix_rank(test)
Out[63]: 3




--
Ryan Krauss, Ph.D.
Associate Professor
Mechanical Engineering
Southern Illinois University Edwardsville


On Fri, Jun 14, 2013 at 2:27 PM, Ryan Krauss <rk...@si...> wrote:

> So, while waiting for a response on my LQR post, I decided to try a pole
> placement approach instead (for the same system).  It doesn't throw any
> errors, but also fails to put the poles anywhere near my desired locations
> (and driving some of the poles unstable).  See attached.
>
> Any thoughts?
>
>
>
> --
> Ryan Krauss, Ph.D.
> Associate Professor
> Mechanical Engineering
> Southern Illinois University Edwardsville
>