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- Newsgroups: comp.dsp
- Path: sparky!uunet!cs.utexas.edu!zaphod.mps.ohio-state.edu!darwin.sura.net!news.duc.auburn.edu!eng.auburn.edu!sjreeves
- From: sjreeves@eng.auburn.edu (Stan Reeves)
- Subject: Re: DSP and Control
- Message-ID: <sjreeves.921120110631@fourier.ee.eng.auburn.edu>
- Sender: usenet@news.duc.auburn.edu (News Account)
- Nntp-Posting-Host: fourier.ee.eng.auburn.edu
- Organization: Auburn University Engineering
- References: <1ednj3INNnup@daisy.ee.und.ac.za> <1992Nov19.222938.28354@griffin.itc.gu.edu.au>
- Date: Fri, 20 Nov 1992 17:06:32 GMT
- Lines: 35
-
- In article <1992Nov19.222938.28354@griffin.itc.gu.edu.au> jchen@tomahawk.me.gu.edu.au (Jinghong CHEN) writes:
- >In article <1ednj3INNnup@daisy.ee.und.ac.za> spaday@daisy.ee.und.ac.za (Strini Padayachee) writes:
- >>What distinguishes a Control engineer from a SP engineer??
-
- >DSP can be considered as a small part of control. The main differences, as far
- >as I can consider, are (1) DSP mainly deals with signals rathan than systems
- >(i.e. control focuses on transfer functions, DSP focuses on FFTs). (2) The
- >signals which DSP will handle are much faster than the signals in process
- >control.
-
- (Well, it's been awhile since I've seen a flame-fest in comp.dsp, but I
- have a strange feeling that one may be coming on. :-)
-
- This is not only an oversimplification of the situation; it's just
- plain inaccurate. DSP is *not* a subset of controls. And DSP uses
- transfer functions all the time. That's exactly how a lowpass filter
- is characterized! DSP and controls use many of the same techniques but
- with different goals. The goal of DSP is simply to process signals --
- to manipulate them into a form that is in some sense more useful
- (Fourier transforms, lowpass filters, deconvolution, compression,
- etc.). In controls, the goal is to control a process. Sometimes this
- involves manipulating signals, but that isn't an end in itself. The
- goal is to achieve a specified output given a physical system.
-
- As an example, if DSP is a subset of controls, then I would like to
- know how data compression fits within a controls framework. (I realize
- that one can make analogies, but that's not the same as saying that
- compression is a controls problem.)
-
-
-
- --
- Stan Reeves
- Auburn University, Department of Electrical Engineering, Auburn, AL 36849
- INTERNET: sjreeves@eng.auburn.edu
-