Here is one I remember.
http://www.rentanadviser.com/en/pid-fuzzy-logic/pid-fuzzy-logic.aspx
There is also a lot of developed open source Fuzzy logic libraries.
Do a search for "Fuzzy Logic Open Source".
Like everything else, some of it is good, some of it is garbage.
Faster than a PID? I don't know if it can be faster, but done right, I
think it can be more effective than a PID. Especially if you really
need something more sophisticated than a simple PID loop.
Normally for a PID, you will have a PV(Process variable) and a Setpoint
for the PV and math is run that creates an Output that affects the PV,
hence the "loop".
A fuzzy logic controller can do the same thing, using two inputs and one
output, or it can be configured with
more than two inputs. So you could have a PV and a Setpoint, then also
an ambient temperature input, a RPM input, a coolant temp input, current
input, etc, etc. and they could all be used to create an output.
My advice when reading up on Fuzzy logic; If it is not understandable,
keep looking for an understandable explanation.
Dave
On 10/19/2018 7:23 PM, Gene Heskett wrote:
On Friday 19 October 2018 19:05:31 Dave Cole wrote:
I did the university thing on control theory, but it was a while ago..
more than 30 years..so I'll leave it at that! :-)
If you are researching loop control theory, you should also look at
Fuzzy logic controllers.
There are some simulator software out there that allow you to compare
Fuzzy logic techniques to traditional PID controls.
Some of them are live webpages.
Interesting, URL's please?
Its very interesting. To me, its amazing how effective fuzzy logic
can be. The big problem that I found is that you have to read quite
a bit before it makes sense.
Can it be faster than a PID?
There are a lot of poor explanations of how it works. Some of the
explanations are so bad that they simply create confusion.
That can also be said of some of the PID descriptions :(
Dave
On 10/19/2018 2:12 PM, Nicklas Karlsson wrote:
Probably not, I have done quite a lot of search on Internet, have a
few books and have taken two courses specifically in the area but if
you have readily available I could always take a look.
I find a lot of documents about PID controllers and theory using
bode, nyquist diagrams.
I found state space feedback and bode, nyquist diagram are useful
also for state feedback but then state space model is available I
prefer method to calculate gains using the model. I could do state
space feedback including integral action but get the feeling a
chapter or so is missing, maybe I have to write it myself.
Someone who really understands it needs to.. Whats out there tends to
talk more theory than hardware. For me at least, that leaves a huge gap
between the theory and the hardwares reaction to best guesses about the
theory because we've no ready made method to measure the moving mass so
what I make work, may be a long ways from optimum. I suspect caution
results in less acceleration than its capable of.
Regards, Nicklas Karlsson
I didn't get to that point at the university. Between the work and
other things I'm taking it at a slow pace. But I have some PDFs
about control theory that may help.
El vie., 19 oct. 2018 a las 14:41, Nicklas Karlsson (<
nicklas.karlsso...@gmail.com>) escribió:
I am still here, working on control theory right now. Anybody who
have a taken any courses of in control theory on University?
On Fri, 19 Oct 2018 14:36:59 -0300
Leonardo Marsaglia <ldmarsag...@gmail.com> wrote:
Same here, the list is very quiet but I'm receiving everything
from this topic.
El vie., 19 oct. 2018 a las 12:04, andy pugh
(<bodge...@gmail.com>)
escribió:
On Fri, 19 Oct 2018 at 15:32, Peter Blodow <p.blo...@dreki.de>
wrote:
I haven't got any mail from this list since Oct.10th. How come?
It does seem odd.
The mail server thingy doesn't think that there have been any
messages, but it might be wrong:
https://sourceforge.net/p/emc/mailman/emc-users/?viewmonth=20181
0
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils
and lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916
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