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- From: johncobb@ut-emx.cc.utexas.edu (John W. Cobb)
- Newsgroups: sci.physics
- Subject: Re: What's new with chaotic dynamics?
- Message-ID: <78857@ut-emx.uucp>
- Date: 1 Sep 92 18:54:39 GMT
- References: <l9l9fdINNrf6@news.bbn.com> <25755@dog.ee.lbl.gov>
- Sender: news@ut-emx.uucp
- Reply-To: johncobb@ut-emx.cc.utexas.edu (John W. Cobb)
- Distribution: na
- Organization: The University of Texas at Austin
- Lines: 34
-
- In article <25755@dog.ee.lbl.gov>, sichase@csa3.lbl.gov (SCOTT I CHASE) writes:
- |>In article <l9l9fdINNrf6@news.bbn.com>,
- hagstrop@oberon.mathcs.carleton.edu (Paul Hagstrom) writes...
- |>>I realize that this is an incredibly unfair question to ask, but I
- will pose it
- |>>anyway, just to see what the response is..
- |>>
- |>
- |>I suggest "controlling chaos" is a good paper topic. It is new and trendy,
- |>and there are good introductory papers in Science, Nature, etc. that you
- |>could dig up.
-
- And if you want to go directly to the article that nature and Science report
- on, The Citation is:
-
- Shinbrot et. al. Physical Review Letters Vol 68, no 19 11 May 1992 p.2863
-
- There was another paper later from this group on improved techniques a few
- motnhs later in PRL.
-
- Look at nearby dates in Science, etc to see more "laymen's terms" reports.
-
- The basic idea is that if you dynamical system has chaotic trajectories,
- then the current trajectory should be very close (in some sense) to a
- trajectory that will take to any given specific point in phase space. So
- you can institute a control system that will allow you to converge to a
- particular state without using much brute force. Your corrections will
- only be slight because you will rely on the phase space dynamics to do
- most of the work. Of course the tough part is to figure out which trajectory
- to hop onto and how to stay there (since you are on a manifold with positive
- Lyapunov expoenents). Neat huh?
-
- john w. cobb
- jwc@fusion.ph.utexas.edu
-