[From Bruce Abbott (2018.11.05.1450 EST)]
Does anyone have a copy of Bill Powers’ “artificial cerebellum” demo? Bill described it in 1994, but thus far I have not been able to locate the actual program. Source code would be great, but even a copy of the executable program would be helpful. I don’t know whether it is a DOS or Windows program, but it wouldn’t matter as I can run either.
Bruce
[Rick Marken 2018-11-05_17:55:29]
Bruce Abbott (2018.11.05.1450 EST)
Â
Does anyone have a copy of Bill Powersâ âartificial cerebellumâ? demo? Bill described it in 1994, but thus far I have not been able to locate the actual program. Source code would be great, but even a copy of the executable program would be helpful. I donât know whether it is a DOS or Windows program, but it wouldnât matter as I can run either.
RM: I think the only person who might have a copy of that is a fellow named Bruce Abbott. I never had a copy because I only worked on Motorola 68000 processors (commodore, apple, etc) for my personal computers until just a few years ago and Bill only worked on PC compatible processors. Maybe that’s why I never learned PCT; well that and my inability to do math.Â
BestÂ
RickÂ
Richard S. MarkenÂ
"Perfection is achieved not when you have nothing more to add, but when you
have nothing left to take away.â?
                --Antoine de Saint-Exupery
Not exactly, but there is a description in the archives, which is a good start
for looking at the implementation:
" (Assume compensatory tracking, desired cursor position = 0)
Let c = model's cursor position
h = model's handle position
h' = observed handle position
d = disturbance applied during real run and model run
z = delay time (I can't transmit "tau")
f(z) = the transfer function.
e = prediction error
Set f(z) to all zeros.
For all values of t from t+z to tmax do:
{
Compute model handle position from control-system model:
c(t) = h(t) + d(t)
h(t) = SUM[ c(t-z)*f(z)] over all z
Compute prediction error e:
e(t) = h'(t) - h(t)
For all z, make correction:
f(z) = f(z) + e(t)*c(t-z)*k, where k is a small fraction.
}
"
There is also a part of the code in the AC with the "armac" demo. It is in the
FTAUCONT.C file, but I'm guessing you know this one.
Oh, and btw. Bill mentiones that this method of deconvolution is practically
identical to "iterative deconvolution" used in signal processing and, can be
derived from Jacobi's method of solving systems of linear equations.
Apparently it was rediscovered independently by several people after Jacobi,
including Bill. Now the method is very common in astronomy and microscopy.
[From Bruce Abbott (2018.11.07.1920 EST)]
[Rick Marken 2018-11-05_17:55:29] –
Bruce Abbott (2018.11.05.1450 EST)
Does anyone have a copy of Bill Powers’ “artificial cerebellum� demo? Bill described it in 1994, but thus far I have not been able to locate the actual program. Source code would be great, but even a copy of the executable program would be helpful. I don’t know whether it is a DOS or Windows program, but it wouldn’t matter as I can run either.
RM: I think the only person who might have a copy of that is a fellow named Bruce Abbott. I never had a copy because I only worked on Motorola 68000 processors (commodore, apple, etc) for my personal computers until just a few years ago and Bill only worked on PC compatible processors. Maybe that’s why I never learned PCT; well that and my inability to do math.
Well, I didn’t have a copy, but I do now thanks to Richard Kennaway, as well as a copy of the Little Man 2 demo to which Bill Powers had added the artificial cerebellum, thanks to Adam Matic. Thanks, guys!
These are DOS programs but I’ve now successfully tested both of them using DOSBox, a utility that emulates DOS on a Windows PC. They work perfectly in Windows 10, would you believe! But more importantly, I now have the source code.
Bruce
[Rick Marken 2018-11-07_16:27:55]
[From Bruce Abbott (2018.11.07.1920 EST)]
Â
RM: I think the only person who might have a copy of that is a fellow named Bruce Abbott. I never had a copy because I only worked on Motorola 68000 processors (commodore, apple, etc) for my personal computers until just a few years ago and Bill only worked on PC compatible processors. Maybe that’s why I never learned PCT; well that and my inability to do math.Â
Â
BA: Well, I didn’t have a copy, but I do now thanks to Richard Kennaway, as well as a copy of the Little Man 2 demo to which Bill Powers had added the artificial cerebellum, thanks to Adam Matic. Thanks, guys!
Â
BA: These are DOS programs but I’ve now successfully tested both of them using DOSBox, a utility that emulates DOS on a Windows PC. They work perfectly in Windows 10, would you believe! But more importantly, I now have the source code.
RM: Super. Could you send me a copy of the source code, please.Â
Best
RickÂ
Richard S. MarkenÂ
"Perfection is achieved not when you have nothing more to add, but when you
have nothing left to take away.�
                --Antoine de Saint-Exupery
[From Erling Jorgensen (2018.11.08 1255 EST)]
Bruce Abbott (2018.11.07.1920 EST)
Well, I didn’t have a copy, but I do now thanks to Richard Kennaway, as well as a copy of the Little Man 2 demo to which Bill Powers had added the artificial cerebellum, thanks to Adam Matic. Thanks, guys!
These are DOS programs but I’ve now successfully tested both of them using DOSBox, a utility that emulates DOS on a Windows PC. They work perfectly in Windows 10, would you believe! But more importantly, I now have the source code.
EJ: Hi Bruce. Along with Rick, I would like to get a copy of the source code, if that would be possible. Thanks. Good talking with you at the IAPCT Conference!
Erling
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