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    ilayn on 1.0.2

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    ilayn on main

    MAINT: pyproject and readme upd… Merge pull request #88 from ila… (compare)

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    MAINT:TST:Transfer: Added dcgai… MAINT:TST:State: Added dcgain m… Merge pull request #87 from ila… (compare)

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Ilhan Polat
@ilayn
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Tim Clephas
@Timple
Dear Ilayn,
"You had my curiosity but now you have my attention" ;-)
I have some questions regarding you toolbox if you don't mind.
Ilhan Polat
@ilayn
Sure, let's have a chat.
Tim Clephas
@Timple
Well, I started shaping controllers last week at my work. I use shapeit for that, maybe you have heard of it?
http://cstwiki.wtb.tue.nl/index.php?title=Home_of_ShapeIt
Ilhan Polat
@ilayn
Yes, I know also the authors.
Tim Clephas
@Timple
I find the tool very convenient because you can really concentrating on shaping instead of modifying a single parameter and running F5 again to create a lot of plots.
Ilhan Polat
@ilayn
That's actually something I'd like to combine with HIFOO
I've contacted HIFOO authors but they didn't like the license. So I need to do all from scratch.
Tim Clephas
@Timple
Ah never heard of HIFOO
Ilhan Polat
@ilayn
I strongly recommend it if you have a model based problem.
Tim Clephas
@Timple
I am creating controllers just on the raw measurement data
Ilhan Polat
@ilayn
It can solve structured control design problems fairly good. Matlab has its own systune and so on which comparable to it.
Tim Clephas
@Timple
Systune is only for PID or not?
Ilhan Polat
@ilayn
No pretty as generalas it gets
For harold, my focus currently is to get more basic stuff like pole placement etc. done. Then these fancy parts will come.
Tim Clephas
@Timple
The problem I am having is that my plant is not very consistent. At various operating points it differs. So I am trying to build a controller while satisfying the stability criteria for all plants.
At ASML we had a tunetool just like shapeit which could handle multiple plants. So then this is easy.
Ilhan Polat
@ilayn
Yes again from Stan and Dennis right?
Tim Clephas
@Timple
So I was wondering if your tool could handle multiple plants at once :)
Ow, I have no clue who wrote the matlab tool
Ilhan Polat
@ilayn
Do you have the models or just the FRF ?
Tim Clephas
@Timple
Just the FRF
Ilhan Polat
@ilayn
Would you bother to derive models for it?
Tim Clephas
@Timple
Lunch just started here, I'll reply again in half an hour
Ilhan Polat
@ilayn
Because if you can then matlab can help you right off-the-shelf
Sure no problem.
Smaakelijk!
Tim Clephas
@Timple
Hmm, I'll look into that. See if I have the correct toolboxes :)
Tim Clephas
@Timple
I do in my Matlab 2013
Tim Clephas
@Timple
Seems that I need models of my data. I prefer to tune on measurement data :(
Lets see how good I can derive models from the data
Ilhan Polat
@ilayn
Yes, the autotuner of matlab requires models of the plant
WG-
@WG-
Hey Ilhan!
Would be nice if you could add matched pole zero and modified matched pole zero methods
to your discretization methods.
Ilhan Polat
@ilayn
Hi @WG-
Do you have anything specific in mind ?
There are lots of variants out there so I kept them out
Currently I'm rewriting the Slyvester solvers instead of scipy defaults. After that I can have a look
WG-
@WG-
The book, Feedback Control of Dynamic Systems of Franklin of 2008 describes MPZ and MMPZ
I will send you the pdf.
Ilhan Polat
@ilayn
No worries. I got that one now I know what you mean. Shouldn't be too hard to implement. I'll have a look.
Ilhan Polat
@ilayn
Though I'm not a big fan of those methods, I guess they have to be there.
WG-
@WG-
For what reason are you not a fan?
Ilhan Polat
@ilayn
They are not approximating the behavior of the system but pole/zero locations. Especially for MIMO systems, it can introduce trouble with interactions.
Ilhan Polat
@ilayn
Speaking of which now I realized that I never wrote MIMO tests for the discretization stuff. I should do that too.