[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
## Re: Control System Design methods using Octave.

**From**: |
shall689 |

**Subject**: |
Re: Control System Design methods using Octave. |

**Date**: |
Wed, 6 Dec 2017 06:11:22 -0700 (MST) |

Hello,
I did some searching and found invfreqz and invfreqs. It seems they can be
used to convert gain/phase data from the system to a transfer function in
the discrete (=G(z)) and continuous (=G(s)) domain respectively. I could
then find out the total closed loop response by G/(1+G*H), where H is the
PID transfer function.
So, I am assuming I could use complex samples from the bode diagram as
inputs to either of these two functions,i.e h=[(1+i),(2+2i),...],
w=[1,1.01,..], n=?,m=?,invfreqz(h,w,n,m). Is that correct? How would I
determine n and m? I am thinking that selecting n=1 and m = 2 would be a
good start. if the plot of the transfer function doesn't give a good match
to the original transfer function, I would just increase m and then increase
n the next time if match is still not good. Would that work?
Am I working in the right direction?
Thanks,
Stephen
--
Sent from: http://octave.1599824.n4.nabble.com/Octave-General-f1599825.html

**Control System Design methods using Octave.**, *shall689*, `2017/12/05`
**Re: Control System Design methods using Octave.**,
*shall689* **<=**
**Re: Control System Design methods using Octave.**, *shall689*, `2017/12/06`
**Re: Control System Design methods using Octave.**, *shall689*, `2017/12/06`
**Re: Control System Design methods using Octave.**, *Doug Stewart*, `2017/12/06`
**Re: Control System Design methods using Octave.**, *shall689*, `2017/12/06`
**Re: Control System Design methods using Octave.**, *shall689*, `2017/12/06`
**Re: Control System Design methods using Octave.**, *Doug Stewart*, `2017/12/06`
**Re: Control System Design methods using Octave.**, *shall689*, `2017/12/07`
**Re: Control System Design methods using Octave.**, *shall689*, `2017/12/06`
**Re: Control System Design methods using Octave.**, *shall689*, `2017/12/06`
**Re: Control System Design methods using Octave.**, *shall689*, `2017/12/07`