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Topic: Improper Systems : PID?
Replies: 1   Last Post: Sep 19, 1996 8:30 AM

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A E Ariffin

Posts: 1
Registered: 12/7/04
Improper Systems : PID?
Posted: Sep 18, 1996 5:45 PM
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--
Hi... !

Dear Netters,

How do you get to put these two systems together using "series" command
in Matlab?

I obtained "improper systems" error message since PID is basically an
improper system.

+
r --->o-------> PID --------> plant ---------+------> y
-^ |
| |
--------------------------------------

I need this to obtain bode plots of the closed-loop system. I have
tried "cov" commands, but I think that produces a slightly different
system ie different step response from the one implemented in Simulink.

Thanks in advance.

Low and Slow...
_____ . .
' \\ . . |>>
O// . . |
\_\ . . |
| | . . . . |
/ | . Aznan Ezraie Ariffin . . . |
/ .| ariffin@csc.umist.ac.uk . ...o |
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