HDTenEightyP/NetNews huggingface dataset:
From: wung@eecom.gatech.edu (Peter Wung)
Subject: Re: Linear Systems Text
Reply-To: wung@eecom.gatech.edu
Organization: School of EE, Georgia Institute of Technology, Atlanta, GA
Date: Thu, 7 Jan 1993 15:17:09 GMT

In article 8sq@ccsun.strath.ac.uk, cnar08@ccsun.strath.ac.uk ("M.Akbar", Electrical Engineering) writes:
>|I  would reccommend the book by Kailath ie Linear Systems.
>|It is an excellent book with plenty of examples and
>|exercises.  I am not sure if it will be cheaper than Desoer's
>|book but I think Kailath's book is one of the best on the subject.


I agree with the above assessment of Kailath's book with the following 
addenda.  It is a great reference book, it is good for people with a 
good background in system theory already, if you were to teach an
advanced undergrad or introductory grad course, Kailath's book assumes
a tad too much in terms of background.  Georgia Tech used Kailath
when I took the course, I hated the book then, but have grown to appreciate 
the insights and richness of his treatment now.  The book that they use 
now is Brogan, which I think is better suited to the beginning grad
school audience.  

IMHO, of course.

---
********************************************************************
*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. 	   *
*								   *
********************************************************************

Newsgroups: sci.engr.control
From: erik@til.com (Erik Horstkotte)
Subject: Re: References on servo-control needed
Reply-To: erik@til.com
Organization: Togai InfraLogic, Inc.
Date: Fri, 8 Jan 1993 18:08:13 GMT

In article 93Jan8094503@chook.adelaide.edu.au, jeremy@cs.adelaide.edu.au (Jeremy Webber) writes:
>Can anybody give me good references on servo-control written for a
>non-engineer?  I have an application where an electric motor needs to
>follow a trajectory accurately and am looking for a better control
>solution than the one I have.  The application uses a computer to derive
>a torque command to a motor controller.

Are you interested in the possibility of using fuzzy control?  If so,
you might want to check out one of the documents on TIL's fuzzy logic
email server - v1i2motr.txt.  This is an article on a comparison
between PID and fuzzy control of a servo motor system, excerpted from
one of TIL's company newsletters - the complete newsletter issue is
also on the server as v1i2.ps.Z.

To retreive this file, send a message of the following form, with no
subject, to fuzzy-server@til.com:

    path jeremy@cs.adelaide.edu.au
    send v1i2motr.txt
    quit

You'll receive the article by return email.
---
Erik Horstkotte, Togai InfraLogic, Inc.
The World's Source for Fuzzy Logic Solutions (The company, not me!)
erik@til.com, gordius!til!erik - (714) 975-8522
info@til.com for info, fuzzy-server@til.com for fuzzy mail-server

Newsgroups: sci.engr.control
From: charlton@hawk.nstn.ns.ca (David Charlton)
Subject: looking for engineering databases, archives
Keywords: engineering
Organization: Nova Scotia Technology Network
Date: Tue, 5 Jan 1993 16:12:07 GMT

Hello All!

I am trying to locate databases or archives with information pertaining to
any of the following topics:

     civil engineering
     industrial engineering
     mechanical engineering
     electrical engineering
     process control

I realize that this covers a lot of ground, but if anyone out there can point
me in the right direction it would be appreciated.  I am attempting to 
demonstrate the virtues of the internet to some folks who would be interested
in the above topics.

Regards, 

Dave C.

***********************************************************************
*  David Charlton       Internet Address: charlton@hawk.nstn.ns.ca    *
*  Network Specialist   Phone:            (902)468-NSTN               *
*  NSTN Inc.            Fax:              (902)468-3679               *
*  Halifax, Nova Scotia, Canada                                       *
***********************************************************************
Newsgroups: sci.engr.control
From: stote@tomcat.den.mmc.com (M. Stote)
Subject: Re: SVD
Organization: Martin Marietta Astronautics Group
Date: Fri, 8 Jan 1993 20:07:19 GMT

In article <C0HM8v.8vz@ccsun.strath.ac.uk>, cnar08@ccsun.strath.ac.uk ("M.Akbar", Electrical Engineering) writes:
|> In article 1ifkptINN9r5@bode.usc.edu, wang@bode.usc.edu (Weizheng Wang) writes:
|> > In article <1992Dec28.202902.29682@noose.ecn.purdue.edu> kavuri@lips2.ecn.purdue.edu (Surya N Kavuri ) writes:
|> > >
|> > >   If I have a transfer function in the Laplace Domain 
|> > > how can I compute SVD ? Are there any algorithms for this ?
|> > >
|> > >  Thanks
|> > >
|> > >  Surya Kavuri
|> > > 
|> 
|> If you have a simple transfer function in Laplace Domain you
|> may need to write a simple program in MATLAB to calculate the
|> SV's using SVD in matlab.

I believe that if you have a transfer function (not TF matrix), then
the singular value = gain.  Of course if you want the decomposed form
of the system then easiest is to transfor transfer fcn into state-space
and use state-space SVD.

|> 
|> What you have to do is define the frequency vector say w
|> and s=jw and calculate the SV's for each point.
|> 
|> 
|> If you have the ABCD matrices then just use sigma in the
|> control toolbox.
|> 
|> Mahmood Akbar

--
Mike Stoughton
stote@den.mmc.com
Newsgroups: sci.engr.control
From: moeller@iw.uni-hannover.de (Henning Moeller)
Subject: Q: feature maps
Reply-To: moeller@iw.uni-hannover.de
Organization: Institut fuer Werkstoffkunde, Uni Hannover
Date: Tue, 12 Jan 1993 15:57:08 GMT


Hi,
We like to develop a control-system for a dynamic system based on feature maps (Kohonen).
Now we have two questions:
 1. Is it necessary to normalize the sensoric signals, if they are of a 
    different kind (position/orientation)?
 2. What`s about the correctness concerning the estimation of the Jacobi 
    matrix in both cases?

Thanks in advance,
                  Henning





-----------------------------------------------------------------------	
|  Henning Moeller	         |  Tel: INT-49-511-762-3906   	      |
|  Universitaet Hannover         |  Fax: INT-49-511-762-5245	      |
|  Institut fuer Werkstoffkunde  |  Email: moeller@iw.uni-hannover.de |
|  Fachgruppe Unterwassertechnik |		   		      |
|  Appelstr. 11a  	         |                                    |
|W-3000 Hannover, GERMANY        |           			      |
-----------------------------------------------------------------------
From: goh@nyquist.usc.edu (K.C.Goh)
Newsgroups: sci.engr.control
Subject: Proof of the Bounded Real Lemma
Date: 11 Jan 1993 10:27:02 -0800
Organization: University of Southern California, Los Angeles, CA
NNTP-Posting-Host: nyquist.usc.edu

The Bounded Real Lemma (BRL) (Anderson 1967(?), Anderson and 
Vongpanitlerd 1973) seems to be becoming more important these 
days due to its connection with the H-infinity problem, eg.
Peterson, Anderson and Jonckheere 1991.

Does anybody in the net know where I can find a complete proof of the BRL 
other then the rather obtuse one in Anderson 1967(?) and the
often cited Anderson and Vongpanitlerd 1973, a copy of which I have been 
unable to find ?

Thank you very much indeed.  

Regards,

K. C. Goh
From: cnar08@ccsun.strath.ac.uk ("M.Akbar", Electrical Engineering)
Newsgroups: sci.engr.control
Subject: Re: SVD
Date: 7 Jan 93 14:14:55 GMT
Reply-To: cnar08@ccsun.strath.ac.uk
Organization: Strathclyde University Computer Centre.

In article 1ifkptINN9r5@bode.usc.edu, wang@bode.usc.edu (Weizheng Wang) writes:
> In article <1992Dec28.202902.29682@noose.ecn.purdue.edu> kavuri@lips2.ecn.purdue.edu (Surya N Kavuri ) writes:
> >
> >   If I have a transfer function in the Laplace Domain 
> > how can I compute SVD ? Are there any algorithms for this ?
> >
> >  Thanks
> >
> >  Surya Kavuri
> > 

If you have a simple transfer function in Laplace Domain you
may need to write a simple program in MATLAB to calculate the
SV's using SVD in matlab.

What you have to do is define the frequency vector say w
and s=jw and calculate the SV's for each point.


If you have the ABCD matrices then just use sigma in the
control toolbox.

Mahmood Akbar
From: neilfp@astro.ocis.temple.edu (Neil F. Palumbo)
Newsgroups: sci.engr.control
Subject: OOPS on HELP Quadratic Eqns
Date: 10 Jan 93 20:05:01 GMT
Organization: Temple University
X-Newsreader: TIN [version 1.1 PL8]

Oops, the Bi matrix is (1x100) NOT (100x1) as I posted. Thanks again in
advance...

				Neil
Newsgroups: sci.engr.control
From: nroddier@noao.edu (Nicolas Roddier)
Subject: Absolute minima theorems
Organization: National Optical Astronomy Observatories, Tucson, AZ, USA
Date: Fri, 8 Jan 1993 14:05:44 GMT

Hello control people!

	I'm looking for some theorems that would garantee that an
	optimization is an absolute minimum. E-L methods give some
	necessary conditions for an optimzation to be an extremum.
	How about some sufficient conditions for being the absolute
	minimum.

	Thanks for any help.

	Nick.

----------
nroddier@noao.edu
From: wang@bode.usc.edu (Weizheng Wang)
Newsgroups: sci.engr.control
Subject: Re: SVD
Date: 6 Jan 1993 14:00:29 -0800
Organization: University of Southern California, Los Angeles, CA
NNTP-Posting-Host: bode.usc.edu

In article <1992Dec28.202902.29682@noose.ecn.purdue.edu> kavuri@lips2.ecn.purdue.edu (Surya N Kavuri ) writes:
>
>   If I have a transfer function in the Laplace Domain 
> how can I compute SVD ? Are there any algorithms for this ?
>
>  Thanks
>
>  Surya Kavuri
>

You may use function SIGMA in CONTROL TOOLBOX in MATLAB to compute it. 
The algorithm is rather simple. Check the manual for detail.

W. Wang
From: wang@nyquist.usc.edu (Weizheng Wang)
Newsgroups: sci.engr.control
Subject: Re: Absolute minima theorems
Date: 11 Jan 1993 14:53:25 -0800
Organization: University of Southern California, Los Angeles, CA
NNTP-Posting-Host: nyquist.usc.edu

In article <1993Jan8.140544.25242@noao.edu> nroddier@noao.edu (Nicolas Roddier) writes:
>Hello control people!
>
>       I'm looking for some theorems that would garantee that an
>       optimization is an absolute minimum. E-L methods give some
>       necessary conditions for an optimzation to be an extremum.
>       How about some sufficient conditions for being the absolute
>       minimum.
>
>       Thanks for any help.
>
>       Nick.
>
>----------
>nroddier@noao.edu
>
If you try to find minimization in a bounded region, I recommend Branch and 
Bound method. This method has been introduced to calculate robust control 
problems recently. It is believed that the method can be used to solve 
non-convex optimization problems. Here are a few references:
 
R.R.E.de Gaston and M.G.Safonov, 1988, Exact calculation of the multiloop 
  stability margine, IEEE trans. AC-33, pp.156-171
A.Sederis and R.S.Sanches Pena, 1990, Robustness magin calculation with dynamic
  and real parametric uncertainty, IEEE trans AC-35, pp.970-974.
V.Balakrishnan, S.Boyd and S.Balemi, 1991, Branch and bound algorithm for 
  computing the minimum stability degree of parameter dependent linear systems,
  Int. J. Robust and Nonlinear Control. Vol.1, pp295-317.
M.P.Newlin and P.M.Young, 1992, Mixed mu problems and branch and bound 
  techniques, Proceedings of 31st CDC, pp.3175-3180

...and the references therein.
 
W.Wang



Newsgroups: sci.engr.control
From: cristja1@netnews.jhuapl.edu (John A. Cristion)
Subject: Model Free Controllers
Organization: JHU/Applied Physics Laboratory
Date: Thu, 7 Jan 1993 19:21:26 GMT

Does anyone know of any papers or ongoing research in the area of
model free (i.e., no assumption about plant dynamics) controllers.
I'm especially interested in the contol of nonlinear and/or time-
varying dynamics.  Please post responces here of e-mail me. 
			

				Thanks in advance,     John
-- 
    	John A. Cristion
	cristja1@aplcomm.jhuapl.edu
	The Johns Hopkins University/Applied Physics Laboratory
	Johns Hopkins Rd., Laurel, MD 20723
From: wakankar@egr.msu.edu (Parag Wakankar)
Newsgroups: sci.engr.control
Subject: Re: Linear Systems Text
Date: 8 Jan 1993 16:49:38 GMT
Organization: Michigan State University
Reply-To: wakankar@egr.msu.edu (Parag Wakankar)
NNTP-Posting-Host: frith.egr.msu.edu
Originator: wakankar@frith.egr.msu.edu

In article <C0G6qt.81u@ecf.toronto.edu> rairan@ecf.toronto.edu (RAI Ranjan) writes:
>Hello.  I like to get some feedback ;) on what people think of the text 
>Linear System Theory by Frank Callier and C. Desoer.  I have just started
>a Intro. to Linear Systems course, and there is no required textbook for the 
>class.  The professor mentioned that this book might be good as a supplement
>to his lectures.  
>

I would recommend a book by Wilson J Rugh.Prentice Hall 1993. Excellent book!
Lot of examples.Covers a lot of ground.

Starting from state equation solution and goes upto Controller Observer forms.
Observer design. State and Output feedback and dabbles a little bit into
geometric theory and its applications.

Very well written. Assumes very little matrix theory knowledge. Good exercises!
Price ~ $ 60.

Kailath and C.T. Chen are good references.Even Raymond Decarlo is an OK book.

Hope this helps

Parag
From: goh@bode.usc.edu (K.C.Goh)
Newsgroups: sci.engr.control
Subject: Re: Linear Systems Text
Date: 7 Jan 1993 10:04:32 -0800
Organization: University of Southern California, Los Angeles, CA
NNTP-Posting-Host: bode.usc.edu

In article <C0G6qt.81u@ecf.toronto.edu> rairan@ecf.toronto.edu (RAI Ranjan) writes:
>Hello.  I like to get some feedback ;) on what people think of the text 
>Linear System Theory by Frank Callier and C. Desoer.  I have just started
>a Intro. to Linear Systems course, and there is no required textbook for the 
>class.  The professor mentioned that this book might be good as a supplement
>to his lectures.  
>
>So do people think it's worth the $75 Cdn., or do you think there is 
>some better (and cheaper) text out there I should be aware of?
>

Some very personal opinions :

Callier & Desoer 1991	My favorite. Very good treatment but you need 
			to have a passable Math background.
			e.g. They use operator theory to introduce
			controllability etc.  Certainly recommended
			if you are looking for an up to date serious
			reference text.

Kailath	1980		Its supposed to be good but I find it very
			disorganized and hard to read. Good treatment
			of the transfer function approach but the state
			space stuff is disorganized.  Also very little stuff
			on time varying systems.  Might be dated.

C.T. Chen 1984		Introduction at a basic level, with comprehensive
			state space treatment.  May be a bit dated.
			Certainly a bit boring.

Brogan, Skelton etc.	I've only quickly glanced at these, but be on your
			guard against buying textbooks which are geared
			too much to the undergrad level.

Let me say it again, the preceding stuff is all IMHO !

>By the way, I have completed the usual systems and signal analysis courses,
>a course in classical control theory, in which we we used "Feedback and 
                                                            ^^^^^^^^^^^^
>Control Theory" by Doyle, Francis and Tannenbaum as the text, and my math
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>background is sufficient.  Also, I plan on doing control stuff in grad
>school.
>

You seem to have a very solid background. I'd take your professor's
advice.  U of T : Is your prof B. Francis ?

>Many thanks for your help. 
>-- 
>Ranjan Rai                             <rairan@ecf.toronto.edu> 
>Engineering Science 9T3                <rr@odin.control.toronto.edu> 
>University of Toronto                    

Thanks for the chance to ramble.

Regards,

K. C. Goh
From: cnar08@ccsun.strath.ac.uk ("M.Akbar", Electrical Engineering)
Newsgroups: sci.engr.control
Subject: Re: Linear Systems Text
Date: 7 Jan 93 14:07:48 GMT
Reply-To: cnar08@ccsun.strath.ac.uk
Organization: Strathclyde University Computer Centre.

I  would reccommend the book by Kailath ie Linear Systems.
It is an excellent book with plenty of examples and
exercises.  I am not sure if it will be cheaper than Desoer's
book but I think Kailath's book is one of the best on the subject.
From: jsacha@uoft02.utoledo.edu
Newsgroups: sci.engr.control
Subject: Control eng. mailing lists ?
Date: 8 Jan 93 15:52:05 EST
Organization: University of Toledo, Computer Services

  Does anybody know e-mail address where I can subscribe to "E-Letter".
I am not sure of this name. It is a control engineering mailing list
posted somewhere from U.K. (?). Also any clues about other mailing list
concerning the field will be appreciated.

  Thanks in advance,

  Jarek
From: sontag@control.rutgers.edu (Eduardo Sontag)
Newsgroups: sci.engr.control
Subject: Re: Linear Systems Text
Date: 8 Jan 93 05:08:53 GMT
Reply-To: sontag@hilbert.rutgers.edu
Organization: Rutgers Univ., New Brunswick, N.J.

Let me add my (self-interested) comment on this:
My book:
  Eduardo D. Sontag,
  __Mathematical Control Theory: Deterministic Finite Dimensional Systems__
  Springer, New York, 1990. (396+xiii pages, ISBN 0-387-97366-4; 3-540-97366-4)

  Series: Textbooks in Applied Mathematics, Number 6.
  Hardcover, $39.00
  Order in USA from 1-800-SPRINGER (in NJ, 201-348-4033)

is geared towards people interested in learning basic linear systems but in
the context of NONlinear systems.  (Thus, many definitions and elementary
properties are given first abstractly; possibly TOO abstractly for many!).
Read this if you are interested in a careful mathematical exposition.
The book does NOT cover some "advanced linear" topics such as H-infinity
optimization, but it does prepare the reader for the WIDE area of control,
including things such as discrete-event systems, differential geometric
nonlinear methods, algebraic techniques, etc.

Table of contents, bibliography, and index are available electronically, for
free, from the SCAD Database in Systems and Control:
   ftp ftp.utdallas.edu, login anonymous, dir pub/scad
(lots of other things there as well).

Last note: Rugh (Johns Hopkins) just published a new book on Linear Systems,
and it seems to be excellent.  Also, Delchamps' book is good and covers
time-varying systems.  None of these were in the lists, I think.
-- 
Eduardo D. Sontag
Department of Mathematics
Rutgers Center for Systems and Control (SYCON)
Rutgers University
New Brunswick, NJ 08903, USA

(Phone: (908)932-3072; FAX: (908)932-5530)
sontag@hilbert.rutgers.edu
Newsgroups: sci.engr
From: morandin@rd.hydro.on.ca (Greg Morandin)
Subject: RESPONSE ABAQUS performance?
Organization: "Ontario Hydro - Research Division"
Date: Mon, 4 Jan 93 15:25:49 GMT

Your problem is one that we have come across continually. We use to run ABAQUS
on a VAX/VMS and currently have it available on a Decstation 5000 for UNIX.
Fortunately we have our own in-house Finite Element code which overcomes all the problems of ABAQUS. It has been difficult to persuade people around here to 
stop using ABAQUS. Some of our clients were trying to solve large deformation
problems and found that ABAQUS would not work. Good Luck!!

These are strictly my personal opinions and not the opinions of tis corporation.
Newsgroups: sci.engr,sci.math
From: chenm@newton.ccs.tuns.ca (Ming chen)
Subject: How to access EPA through internet/bitnet ?
Date: Wed, 6 Jan 1993 20:35:27 GMT
Distribution: sci.engr
Organization: Technical University of Nova Scotia, Halifax, N.S.


Hello, all

Is there any way I can access EPA BBS (for example CEAM) through
----------------------------------------------------------------
internet/bitnet ?
-----------------


Thanks for your help.

/ming


Email: chenm@tuns.ca
From: Chad.Armstrong@f52.n357.z1.fidonet.org (Chad Armstrong)
Newsgroups: sci.engr
Subject: Re: Engineering College
Date: 10 Jan 93 18:20:00 GMT

I think Terence T. Lung once said something about Engineering College to
All on 01-10-93  06:16.....

 TTL> From: lungtt@gus5.ecn.purdue.edu (Terence T. Lung) TTL>
 Organization: Purdue University Engineering Computer Network

 TTL> In article <726341101.AA00025@eilc.fidonet> 

 TTL> Here's my $0.02 overdose of ideas:

Thanks a bunch, I'll be seriously looking into what you've said, and I
appreciate the time youve taken to give this information to me.. Your
comment about posting in a newsgroup is entirely right! I have done so,
and have recieved several replies of worth, yours being one of them..

Again, thanks.. Chad Armstrong
<Chad.Armstrong@f52.n357.z1.fidonet.org>

... You can't get there from here, you have to go somewhere else first
 ~ Blue Wave/QWK v2.12 ~

 * Origin: Osten Ard *phantom14.4k (503)258-3612 (1:357/52)
From: wbg@festival.ed.ac.uk (W Geake)
Newsgroups: sci.engr
Subject: Re: Jobs are available in Hong Kong
Date: 8 Jan 93 15:27:47 GMT

choy@dvinci.USask.Ca (Henry Choy) writes:


>I have heard that engineers in Hong Kong can find a job they like in 1
>week.

I have heard that over 2 people have found jobs in Britain since 1979.
Newsgroups: sci.engr
From: albrecht@csd4.csd.uwm.edu (Chad Edward Albrecht)
Newsgroups: sci.engr
Subject: Plastic "Glue"
Date: 7 Jan 1993 20:09:51 GMT
Organization: University of Wisconsin - Milwaukee
NNTP-Posting-Host: 129.89.7.4



A few years ago I use a chemical to bond a couple peices of acylic together.
The chemical was a kind of "solvent" that temporily melted the plastic, then
dried in about 30 seconds to bond 2 peices together. 

Anyone know what this was?  Thanks in advance!

--
>><<>><<>><<>><<>><<>><<>><<>><<>><<>><<>><<>><<>><<>><<>><<>><<>><<>><<>><<>>
|  Respond to any of these adresses:    |  "Oh Lord...Ooooh you are so big..,|
|  --------------------------------	| So absolutely huge.  So ab - sol-  |
|  albrecht@csd4.csd.uwm.edu            | utely huge.  Gosh, we're all really|
|  albrecht@convex.csd.uwm.edu		| impressed down here I can tell you!|
|  acct146@carroll1.cc.edu		| --Monty Python: The Meaning of Life|
|============================================================================|
|  UWM-CSD UNIX/MICRO CONSULTANT  Phn# (414) 229-5370 [standard disclaimer]  | 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Xref: sparky sci.engr:2472 sci.engr.mech:721
From: billc@Apple.COM (Bill Cockayne)
Newsgroups: sci.engr,sci.engr.mech
Subject: Engineer's Journal sw
Date: 9 Jan 93 00:25:50 GMT
Followup-To: sci.engr
Organization: Apple Computer Inc., Cupertino, CA

I know that many engineer's were forced to keep log books (or lab books)
during some period of there college career. And it seems that many of us have
picked up this horrible habit and continue to do it in industry. But I have
noticed one thing that I have noticed is lacking and that is the creation of
a really useful online version of our lab books.

Is this simply because the marketing bozos don't think there is a market? Are
we too timimd to ask for them, and too busy to write one ourselves? Do we 
even want such a thing? Are there legal reprecussion having all your notes on
the computer instead of on poaper (ie, patents)?

Any thoughts, ideas, etc?

bill cockayne
Apple Computer, Inc.
billc@apple.com

DISCLAIMER: I speak only for myself. 

ps - If someone were to try to write and engineers' tool, what would it    
include as its pieces? Would each discipline need its own module? ....
Newsgroups: sci.engr