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- Path: sparky!uunet!cs.utexas.edu!uwm.edu!caen!nic.umass.edu!dime!rabbit.cs.umass.edu!connolly
- From: connolly@rabbit.cs.umass.edu (Christopher Ian Connolly)
- Newsgroups: comp.robotics
- Subject: Re: Mobile Robots - Planning and Control
- Message-ID: <57710@dime.cs.umass.edu>
- Date: 17 Dec 92 23:01:12 GMT
- References: <102392@netnews.upenn.edu>
- Sender: news@dime.cs.umass.edu
- Organization: University of Massachusetts, Amherst
- Lines: 32
-
- In article <102392@netnews.upenn.edu> sarkar@grip.cis.upenn.edu (Nilanjan Sarkar) writes:
- >I am looking for pointers towards merging algorithms of mobile robots.
-
- Your problem seems to involve reactive path planning, so I'll give a
- pointer to some of the work going on at this lab:
-
- Connolly CI, Grupen RA, "Harmonic Control", Proc. 1992 International
- Symposium on Intelligent Control, August 1992, IEEE
-
- Connolly CI, "Applications of Harmonic Functions to Robotics",
- Proc. 1992 International Symposium on Intelligent Control,
- August 1992, IEEE
-
- There are others, but these are the best to start with. In robotics
- parlance, it's a "potential field" approach -- but it's based on the
- classical potential (Laplace's equation). The basic idea is an appeal
- to incompressible fluid flow -- hence no local minima. The digital
- implementations we use are adequate for real-time planning for a
- Denning robot, and for low-resolution control/planning for a P-50 arm.
-
- The method can also be implemented using a resistive network. This
- sort of an implementation can provide reaction to dynamic obstacles on
- the order of milliseconds, if not microseconds. Another convenient
- aspect of the approach is that the resulting paths are almost always
- smooth. The two papers above describe how the method can be used with
- a dynamic environment map, and they contain other pointers to the
- literature.
- --
- - - - - - - -
- Christopher Ian Connolly connolly@cs.umass.edu
- Laboratory for Perceptual Robotics wa2ifi
- University of Massachusetts at Amherst Amherst, MA 01003
-