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- From: erik@maui.til.com (Erik Horstkotte)
- Subject: Re: Fuzzy Inverted Pendulum
- Message-ID: <1992Nov10.170449.24768@til.til.com>
- Sender: erik@maui (Erik Horstkotte)
- Nntp-Posting-Host: maui
- Organization: Togai InfraLogic, Inc.
- References: <1992Nov9.092931.42@kirk.msoe.edu>
- Distribution: usa
- Date: Tue, 10 Nov 1992 17:04:49 GMT
- Lines: 31
-
- In article <1992Nov9.092931.42@kirk.msoe.edu>, welch@kirk.msoe.edu writes:
-
- |> I'm trying to put together some inverted pendulum modules
- |> for demonstration/lab purposes for fuzzy logic. So far we
- |> are leaning towards a ball-screw type linear drive for the
- |> platform with a low friction pot for the pendulum pivot.
-
- I don't know of anyone who sells these, even as kits, but here are
- some ideas:
-
- 1. Instead of the ball-screw drive, why not use an aircraft steel
- cable string between two pulleys/bobbins. This is the kind of
- approach I've seen in most pen plotters for moving the pen, and in
- a few printers for moving the printhead. It seems to work well,
- without much stretch.
-
- 2. Another possibility - a Gilmor (spelling?) belt between pulleys.
- I've seen these in a lot of lower-priced printers. These are the
- toothed flexible belts, where the pulleys may or may not have
- teeth that mesh with the belt.
-
- 3. Instead of the pot for the pivot, you consider one of HP's cheap
- optical encoder pot replacements. They are probably rather more
- expensive than a pot (I think about $20), and need a decoder chip,
- but are quite precise and have really good repeatability. We used
- these in one of our projects with good success.
- --
- 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
-