HDTenEightyP/NetNews huggingface dataset:
From: pete@zorro.tyngsboro.ma.us (Peter A. Darnell)
Subject: Re: Tinker Toys
Organization: ClickTech
Date: Mon, 28 Sep 1992 23:37:55 GMT

In article <1992Sep22.150058.2642@news.nd.edu> jott@scarecrow.cse.nd.edu (John Ott) writes:
>I am looking for vendors with products that could help me put together a
>hands-on mechanical station for a student controls laboratory (e.g. tinker toys, legos or erector sets).  If you have any experience putting such a lab
>together please share your opinions.  This should be a desk top sized station.
>
>I am trying to find a company that advertised on page 44 of the October 1990
>issue of "Designfax":
>	
>	Automat
>	PO Box 22666
>	Memphis, TN   38122-0666
>
>Thanks in advance.
>
>I will summerize and post any responses.
>
>John
>jott@scarecrow.cse.nd.edu  

You might consider VisSim to model and run your controls lab projects. 
Though our software is most definitely not a toy, it is reasonably
priced and fun to use.  It runs on Microsoft Windows and Unix/X
platforms, is visually programmed through block diagrams, supports
nonlinear dynamical modeling and real-time I/O cards from Metrabyte,
Advantech, Data Translations, and Strawberry Tree. It has an analyze 
option which linearizes any subdiagram and will generate Bode, root
locus, and transfer function info.  We just returned from the Control
Applications Conference in Dayton, Ohio where we demonstrated VisSim
balancing an inverted pendulum. We also interface to the experiments
supplied by Quanser Consulting of Toronto, they make ball and beam,
inverted pendulum, and other real time experiments, but our D/A and
A/D capability will interface to your erector set as well.

VisSim is used at numerous collegiate and commercial sites including
MIT, Boston Univ., Georgia Tech, Skidmore LSU, Penn State, TU Delft,
Univ. Iceland, Univ. Hartford, Drexel, Univ, Colorado, Univ. Puerto
Rico, GE, IBM, HP, Garret Aerospace, Dow Chemical, Milwaukee Electric,
Sanders/Lockheed, United Technologies, Mazda, Ford, GM, Sverdrup,
Dupont, and Draper Labs.  

VisSim should prove to be the ideal software base to model and control
your structure, be it stainless steel or tinkertoy.  I'd be happy to
provide free working demos and product literature to anyone who
replies  to this message.

Sincerely,
Peter A. Darnell
President
Visual Solutions, Inc.
pete@vissol.com

Newsgroups: sci.engr.control
From: scotbri@flower.samsung.com (Scott Brigham, corp)
Subject: Re: Fuzzy Logic and memory
Originator: scotbri@flower
Organization: Rosemount, Inc.
Date: Wed, 30 Sep 1992 16:07:57 GMT

From article <1992Sep29.144132.8473@csi.jpl.nasa.gov>, by mwette@csi.jpl.nasa.gov (Matt Wette):
> 
> I've had a very limited exposure to Fuzzy Logic.  However, from what
> I've seen Fuzzy Logic is memoryless.  This seems to be a severe
> limitation.  What is done to rectify the situation.  One possibility
> is to use state estimators.  Do others exist.  I could imagine that
> someone would want to use a dynamic logic function which maps the
> input sets to the output sets.  Is this done?
> 
> Matt
> -- 
> mwette@csi.jpl.nasa.gov

Fuzzy logic is not memoryless if the input quantities have memory!
A prime example of this is a simple control loop that uses error
and error rate of change as input variables.  The rate of change
variable has memory in that it needs to know the previous value
as well as the present value.  Fuzzy logic is a way of processing
data.  What that data is depends on what information you need
to control your system.  And for the typical control application where
the fuzzy output variable is a differential value, it gets inherently
integrated so viola -- you have memory again!

=======================
scotbri@rosemount.com
Scott Brigham
Rosemount, Inc.
Eden Prairie, MN
=======================
Newsgroups: sci.engr.control
From: joleksy@casbah.acns.nwu.edu (Jerome Oleksy)
Subject: Re: Another Fuzzy Company:  Omron?
Summary: Omron PLC's and Fuzzy  
Keywords: Fuzzy,PLC
Organization: Northwestern University, Evanston Illinois.
Date: Fri, 2 Oct 1992 13:31:29 GMT

I recently attended a Fuzzy seminar at the Omron facility in Sch.  They had
two demos of what they claim is the only "true" fuzzy controller.

One demo was the pendulum.  The feedback for the balanced stick came from a
reostat on the pivot point and balance compensation came from circular
motion of the base.  Several golf balls could be balanced on a dish!.

The second demo was temperature control.  This was more interesting in that
the fuzzy solution to PID was only used to maintain or recover temperature
fluctuations, but not to reach the initial temperature.  I pressed the
demonstrator, but he never gave me a satisfactory answer as to why fuzzy
was not used for the whole cycle.  Except to say that it did not work.

Both demo's used existing commercial hardware, with some modifications for
the pendulum.  The temp controller is available and Omron has a fuzzy logic
module available for their large scale PLCs, 1024 I/O.

Jerry Oleksy
BIRL Northwestern University
joleksy@casbah.acns.nwu.edu,edu
From: roat@rrc.chevron.com (Suzanne Roat,Chevron,(510)242-5313)
Newsgroups: sci.engr.control
Subject: Re: Fuzzy logic references wanted
Date: 30 Sep 92 14:03:52 GMT
Reply-To: roat@rrc.chevron.com
Organization: Chevron, Richmond, California

>Perhaps you are aware that the inventor (Prof. Lotfi Zadeh) is Iranian.
>Unfortunately, it seems that may have had something to do with it.
>
> - Farzin Mokhtarian
>   farzin@apollo3.ntt.jp
>                 

I don't think so.  Or at least I hope not.  Deming had the same problem
preaching continuous process improvement.  He went to Japan after WWII
and turned the country around with his philosophy.  He couldn't get
American industry to give him the time of day.  Now that we see what
his philosophy can do, we are grudgingly trying to apply his principles
in America.

The problem is more of a cultural difference.  To the Japanese, the concept
of fuzzy logic fits perfectly into their way of thinking.  To the Americans,
fuzzy logic sounds like some half-baked scam to sell more computer chips.  I
should say average Americans.  There is some hope of getting fuzzy logic to
take hold in the US with so many of us techno-geeks trying it.  In Japan,
appliances, cars, etc. that make use of fuzzy logic, freely advertise that
the product uses fuzzy logic - it's one of the selling points.  In the US, we're
going to have to disguise the fuzzy logic part of the product until the 
notion gains acceptance.

---
Suzanne Roat				Phone:	(510) 242-5313 Voice 
Chevron Research and Technology Company		(510) 242-4647 FAX
100 Chevron Way				Email:	roat@rrc.chevron.com
Richmond, CA  94802-0627

Newsgroups: sci.engr.control
From: parish@astro.as.utexas.edu (Tom Parish)
Subject: Re: Address of Reza Langari anfd his FUZZY research group..
Summary: Per your request for info
Organization: Univ. of Texas McDonald Observatory
Date: Mon, 28 Sep 1992 13:05:32 GMT



es somebody know Reza Langari in Texas A&M and his Fuzzy 
  Research group?
 
You can send him email at langari@arya.tamu.edu (Reza Langari).  I'll
be glad give you his phone if you wish.  He and his group have
a major conference on fuzzy logic on December 2 and 3 at TAMU.
 
                                      Fuzzy             Crisp
                                 -            1.0 | True
                                   -           .9 |
  A P T R O N I X    I N C.          -         .7 |
The Fuzzy Logic Technology Co.         -       .5 |
                                         -     .3 |
TEL: 512-331-0813   parish@cactus.org      -   .1 |
FAX: 512-331-0841                            -  0 | False
From: yee@edison.seas.ucla.edu (John Yee)
Newsgroups: sci.engr.control
Subject: Re: Info. on Control guy
Keywords: W. M. Wonham
Date: 3 Oct 92 13:07:40 GMT
Organization: SEASnet, University of California, Los Angeles

Wonham also wrote a sort of recent article in Control Systems Magazine, IEEE,
about the general future of control.  His writing is entertaining and he
makes use of many quotes from diverse sources, some in the original Greek.
(Much opportunity for bad pun jokes here which I will forego fornow.)
His style and sense of humor may make him not such a scary guy, 
though he may be very busy.

The book is: Linear Multivariable Control, #3 of the Springer Verlag
             Applications of Mathematics series.

I'm too dumb to understand the book just yet, so maybe some knowledgeable
netter can post here the basic idea of Wonham's methods and how they have
progressed up to the present day?
-- 
jy, yee@seas.ucla.edu - "The man with no .sig"
Newsgroups: sci.engr.control
From: teek@kingcong.UWaterloo.ca (Prateek Dwivedi)
Subject: using RCS as a database manager
Organization: University of Waterloo
Date: Tue, 6 Oct 1992 20:29:39 GMT

Has anyone used RCS as a database manager for their CACSD environment?

All the articles I read always say that a database manager
should be used when creating a CACSD environment.  Some even show sample
structures, but I have not come across any one "admitting" to using
off the shelf database managers, and how they were implemented.

I choose version control software because it seems easier to implement. But
any experiences would be valued on this matter.

-- 
Teek (Prateek Dwivedi)                  teek@kingcong.uwaterloo.ca
Research Assistant                      pdwivedi@systems.watstar.uwaterloo.ca
Flight Control Systems Group            (519)885-1211 x5314     Voice
University of Waterloo, Canada          (519)746-3077           Fax
Newsgroups: sci.engr.control
From: rairan@ecf.toronto.edu (RAI Ranjan)
Subject: Info. on Control guy
Keywords:   W. M. Wonham
Organization: University of Toronto, Engineering Computing Facility
Date: Fri, 2 Oct 1992 04:24:59 GMT

  Has anyone out there ever heard of W. M. Wonham, a control theoretician
up here at U of T.  What has he done that's so special?

  I'd ask him myself, but he scares the heck out of me.



-- 
Ranjan Rai                             <rairan@ecf.toronto.edu> 
Engineering Science 9T3                <rairan@eecg.toronto.edu>
University of Toronto                      
Newsgroups: sci.engr.control
From: focstea@lims01.lerc.nasa.gov (CHRISTOPHER STEARNS)
Subject: Re: Query on the use of software packages in control engineering
Summary:  Integrated System Inc. (ISI)
News-Software: VAX/VMS VNEWS 1.41    
Keywords:  MatrixX, Matlab, ACSL, Easy5
Organization: NASA Lewis Research Center
Date: 29 Sep 1992 07:50 EST  

In article <22SEP199209021442@ariel.lerc.nasa.gov>, mattern@ariel.lerc.nasa.gov (Duane Mattern (Sverdrup)) writes...
>We recently had The Mathwork's SimuLink in for an evaluation.
> 
>Duane Mattern	(mattern@mars.lerc.nasa.gov)	(216)433-8186
>Sverdrup @ NASA Lewis, M/S 77-1, 21000 Brookpark Rd., Cleveland, OH 44135

Just a clarification, but I believe the Mathwork's simulation package that 
is integrated with Matlab is called Simulab.

Chris

Newsgroups: sci.engr.control,comp.ai
From: aaronf@cse.ucsc.edu (Aaron T. Ferrucci)
Newsgroups: sci.engr.control
Subject: References sought on adaptive control
Date: 29 Sep 1992 18:13:26 GMT
Organization: University of California, Santa Cruz (CE/CIS Boards)
Distribution: world
NNTP-Posting-Host: arapaho.ucsc.edu
Keywords: adaptive control, machine learning

Hello all,

I am working on a machine learning project which attempts
to guide a small robot along a wall without collision. 

It occurred to me that much of what I am doing could fall under 
the heading of adapative control... therefore I should educate 
myself in that subject!  If you have a favorite book, paper, or 
algorithm relating to adaptive control, please send me email about 
it. If I get more than a few replies, I'll post a summary in a week.

thanks, 
((((((((((((((((((((((((((((((((((())))))))))))))))))))))))))))))))
((((((((((( Aaron Ferrucci (aaronf@cse.ucsc.edu) ))))))))))))))))))
((((((((((((((((((((((((((((((((((())))))))))))))))))))))))))))))))
From: jem21176@uxa.cso.uiuc.edu (Jon E. Meyer)
Newsgroups: sci.engr.control
Subject: Another Fuzzy Company:  Omron?
Date: 30 Sep 92 19:28:38 GMT
Article-I.D.: news.BvEorr.n00
Organization: University of Illinois at Urbana

Does anyone know about this company?
They're in Schaumburg, IL and I've
heard they have a lot of the original
patents in fuzzy logic?  Is this right?
Who knows more?

Jon Meyer
j-meyer10@uiuc.edu
Newsgroups: sci.engr.control
From: hueske@iw.uni-hannover.de (Marc Hueske)
Subject: neuro-fuzzy-controller
Reply-To: hueske@iw.uni-hannover.de
Organization: Institut fuer Werkstoffkunde, Uni Hannover
Date: Tue, 6 Oct 1992 15:10:21 GMT

Our project is to develop a Neuro-Fuzzy-Controller for an underwater vehicle
(ROV, AUV). We would like to know if there is any literature about this or similar
subjects. Furthermore we are interested in PD-software about neuro-fuzzy.

Thanks in advance,

Marc Hueske



Newsgroups: sci.engr.control
From: erik@maui.til.com (Erik Horstkotte)
Subject: Re: Another Fuzzy Company:  Omron?
Organization: Togai InfraLogic, Inc.
Distribution: usa
Date: Fri, 2 Oct 1992 16:52:18 GMT

In article <1992Oct1.115502.615@doug.cae.wisc.edu>,
longstre@snake-1.cae.wisc.edu (Jon Longstreth) writes:

[stuff deleted]

|> They had a fuzzy controler on the clasic inverted pendulem.
|> Apparently you could tap the pendulum with your hand and it would
|> not
|> tip over.  (Did I mention that this pendulum was NOT constrained
|> to
|> 2D movement?)
|> 
|> My friend was pretty impressed.
|> That's all I've heard.

Actually, it turns out that the controller for the two degree-of-
freedom inverted pendulum is just the controller for the one degree-
of-freedom version duplicated for each rotational axis.  Still, it
makes a pretty spiffy demo!

PS: You wouldn't happen to run a detective agency, would you?  Oh,
that's *Langstretch*.  Sorry, wrong number.
-- 
Erik Horstkotte, Togai InfraLogic, Inc.
erik@til.til.com, uunet!til!erik - (714) 975-8522
Standard disclaimer: the preceding are my opinions, not TIL's.
Newsgroups: sci.engr.control
From: erik@maui.til.com (Erik Horstkotte)
Subject: Re: Another Fuzzy Company:  Omron?
Organization: Togai InfraLogic, Inc.
Date: Thu, 1 Oct 1992 17:59:45 GMT

In article <BvEorr.n00@news.cso.uiuc.edu>, jem21176@uxa.cso.uiuc.edu
(Jon E. Meyer) writes:
|> Does anyone know about this company?
|> They're in Schaumburg, IL and I've
|> heard they have a lot of the original
|> patents in fuzzy logic?  Is this right?
|> Who knows more?

They have a subsidiary, Omron Electronics, in Schaumburg, IL.  I 
believe that this is a subsidiary of Omron Corporation, located in
Japan.  They're mainly known in our office for selling the world's
first fuzzy *decellerator*.  It's a hardware fuzzy inference chip,
the FP3000, which actually performed *slower* in all of the
benchmarks
done by Siemens in Germany than the output of our *software*
product, the FCDS, did on a 80486-based PC.

Sorry for the "commercialism", but I still get a very unprofessional
giggle every time someone brings their stuff up.

As far as patents are concerned, I believe that they do have some
on certain *applications* of fuzzy logic.  I have yet to see one
that they hold on fuzzy logic or fuzzy expert systems, per se.

PS:  The FP3000 was about a factor of 5 times slower than our FC110
hardware product in these same benchmarks.  The FC110 is the lowest-
performance hardware device we supply.  Our latest operates about
four times faster than the FC110, and a new version that is under
development will be faster yet.
-- 
Erik Horstkotte, Togai InfraLogic, Inc.
erik@til.til.com, uunet!til!erik - (714) 975-8522
Standard disclaimer: the preceding are my opinions, not TIL's.
Newsgroups: sci.engr.control
From: wung@ee.gatech.edu (Peter Wung)
Subject: Re: Undergrad. textbook for state-space metho
Reply-To: wung@ee.gatech.edu
Organization: School of EE, Georgia Institute of Technology, Atlanta, GA
Date: Fri, 25 Sep 1992 20:30:07 GMT

In article 3uF@watserv1.uwaterloo.ca, teek@kingcong.UWaterloo.ca (Prateek Dwivedi) writes:
>|How about Brodan's Modern Control Systems?  Seems fairly complete for a
>|junior/senior level course.
>|
>|-- 
>|Teek (Prateek Dwivedi)			teek@kingcong.uwaterloo.ca
>|Research Assistant			pdwivedi@systems.watstar.uwaterloo.ca
>|Flight Control Systems Group		(519)885-1211 x5314	Voice
>|University of Waterloo, Canada		(519)746-3077  		Fax


I believe that is Brogan's book.  We used that book either as a main text for the Intro to Modern Controls course in EE here at Tech, or as a supplement to Kailath's
book.  I like it a lot as a reference.
---
********************************************************************
*Peter Wung			Email:wung@ee.gatech.edu	   * 
*Electric Power Laboratory	Snail mail: 33787 Ga. Tech Station * 
*School of Electrical Engineering	    Atlanta, GA 30332      *
*Georgia Institute of Technology			    	   *
*Atlanta, Georgia						   *
*   	"Pass, Set, CRUSH!"...					   * 
*  	Well, 2 out of 3 ain't bad for a short, fat guy. 	   *
*								   *
********************************************************************
From: whu@koh-sun11.usc.edu (Kuo-Ray Whu)
Newsgroups: sci.engr.control
Subject: Address of Reza Langari anfd his FUZZY research group..
Date: 26 Sep 1992 14:38:50 -0700
Organization: University of Southern California, Los Angeles, CA
Distribution: world
NNTP-Posting-Host: koh-sun11.usc.edu


Keywords: 

Hi there,
	Does somebody know Reza Langari in Texas A&M and his Fuzzy Research group?
	He "is supposed " to be there, but I don't know which department he is in.
	I cannot find him in A&M's catalog 91-92 neither.
	Would someone out there tell me WHERE HE IS?
	Thank in advance.

kuoray whu
whu@scf.usc.edu
From: nnkota@icaen.uiowa.edu (Narendra Nath Kota)
Newsgroups: sci.engr.control
Subject: Re: Need optimization help
Keywords: models, tune, MatLab, practical
Date: 1 Oct 92 11:54:41 GMT
Distribution: usa
Organization: Iowa Computer Aided Engineering Network, University of Iowa


 

I think what you're referring to then could be considered in Optimal Control category. and If I'm right, there are several approaches that have been implemented such as variational formulation and Discrete-time techniques. Here, I know recently, there was one paper about optimal control of HVAC systems, in which they used variational and DTM methods and observed that DTM is more easier to implement. However (it would be too much of discretization in time)
Another approach that could be considered is Dynamic programming. and you can refer to books by searching for DP
some other work that you could refer to is DDP. (Differential DP)

Naren
     
 
Xref: sparky sci.engr.control:97 comp.realtime:1131
From: dong@umiacs.umd.edu (Dong Chen)
Newsgroups: sci.engr.control,comp.realtime
Subject: How much is this Z80 worth ?
Date: 30 Sep 92 05:04:59 GMT
Followup-To: sci.engr.control
Organization: UMIACS, University of Maryland, College Park, MD 20742

Hello,

Could some kindness soul tell me how much is this worth ?
	Z80 128k ram, floppy controller, 2 serial ports, 1parallel port.

And how usefull and how hard to learn it ? I have extensive experience
with C/Unix. I am trying to learn some low level hardware things.

Thanks,
From: jeffl@lab240a.ee.unsw.edu.au (jeff lee)
Newsgroups: sci.engr.control
Subject: Re: Parameterizing control systems
Date: 29 Sep 92 06:38:32 GMT
Organization: Systems & Control, UNSW

In article <1992Sep13.213120.12709@kakwa.ucs.ualberta.ca> PH19@vm.ucs.UAlberta.CA writes:
>Hi;

>I'm trying to estimate the parameters of a fairly simple classical control
>system.  There are n parallel systems each of which is a simple second
>order system using the same paramters (ie, all n systems have identical
>parameters).  The inputs to these systems are known, but the outputs
>are not, rather what I have is a stream of data showing the identity of
>the system that had the highest output at that time.  From this data
>I hope to find out the parameters.  Has anyone any suggestions as to
>where I might look to find out how to do it?  Or better yet, has anyone
>any idea of how it might be done.  Oh, and for the curious, this is a
>model of a consumer choice process where the data is the purchased
>brand and timing and the inputs are the pertinent marketing variables
>for each of n products.

>Any help would be greatly appreciated.

>Chris Dubelaar
From: whu@koh-sun11.usc.edu (Kuo-Ray Whu)
Newsgroups: sci.engr.control
Subject: People do fuzzy control because they don't really know control?
Date: 26 Sep 1992 14:49:32 -0700
Organization: University of Southern California, Los Angeles, CA
Distribution: world
NNTP-Posting-Host: koh-sun11.usc.edu


Hi ;
	Last week I came thru a prof. in control division. He said "
	SOME people do fuzzy control because they don't really know control,"
	Well... I am not control major,so ... How do you think? How many does the SOME mean?

kuoray
Dept. of EE
USC

Newsgroups: sci.engr.control
From: rm10960@meibm28.cen.uiuc.edu (Robert Mcnab)
Subject: Expert Systems for Controls
Organization: CCSO College of Engineering Workstations
Date: Thu, 1 Oct 1992 20:24:00 GMT

I'm a controls guy, taking an expert systems class and I'd
like to find out about expert systems for controls.  Can anyone
give me some leads about past and recent papers in the field?

Thanking you in advance
Rob

Newsgroups: sci.engr.control
From: makhan@IASTATE.EDU (Mohammed A Khan)
Subject: Need a controls job
Reply-To: makhan@IASTATE.EDU (Mohammed A Khan)
Organization: Iowa State University
Date: Wed, 30 Sep 1992 16:30:05 GMT

I am graduating in December, 1992 with a Master of Science degree. My area of
study has been automatic control systems (design & application) and
optimization. If anyone has any information regarding job opportunities in these
areas, I would sincerely appreciate it if you could forward it to me.

Xref: sparky sci.engr.control:98 comp.object:3786 comp.graphics:10127 comp.lang.c:14301 comp.lang.c++:14321 comp.lang.fortran:3787 comp.windows.x:17271 comp.windows.misc:1517 sci.engr:2075 comp.software-eng:3567
From: mwette@csi.jpl.nasa.gov (Matt Wette)
Subject: Re: Info. on Control guy
Originator: mwette@mr-ed
Keywords:   W. M. Wonham
Organization: Jet Propulsion Lab
Date: Fri, 2 Oct 1992 14:37:52 GMT


In article <BvH89o.2x1@ecf.toronto.edu>, rairan@ecf.toronto.edu (RAI Ranjan) writes:
|>   Has anyone out there ever heard of W. M. Wonham, a control theoretician
|> up here at U of T.  What has he done that's so special?

Murray Wonham is a sharp guy.  In the 60's and 70's he developed a
geometric theory for "state space control" theory.  Check out his book
"Linear Multivariable Control: a Geometric Approach."  In the past 10
years or so he has developed theories for discrete event systems.
Check out the Ramage/Wonham papers.  He has applied "state space
control" methods to discrete event (dynamic) systems.  What is a
"minimal realization" for a continuous system is a "trim realization"(?)
for a discrete event dynamic system.  (It's been a while since I read
any of this stuff.)

Matt Wette
-- 
mwette@csi.jpl.nasa.gov
Newsgroups: sci.engr.control
From: rolfe@fraser.sfu.ca (Christopher John Rolfe)
Subject: Comp.Fuzzy
Organization: Simon Fraser University, Burnaby, B.C., Canada
Date: Fri, 2 Oct 1992 16:05:46 GMT

	Ditto on a separate fuzzy group.  I'm interested in musical
applications of fuzzy subsets, not so much in engineering control
situations.

-- 
Chris                   | 2617 East 4th,| If brevity is the soul of 
rolfe@sfu.ca            | Van., B.C.    | wit, what is semibrevity
Simon Fraser University | V5M 1K5       | the soul of?
Burnaby,  Canada        | Canada        | 
Newsgroups: sci.engr.control