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Article #318Re: velocity sensing for robotic joints
From: John Eaton
Date: Wed, 22 Aug 1990 16:07
Date: Wed, 22 Aug 1990 16:07
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>>> >assuming one is using optical encoders (with 2-phase output) >to measure position of a (rotary) robotic joint, what should one use >to then measure velocity?? ---------- If you are already measuring position then all you need is a way to measure Time. You simply interrupt your micro at a regular rate and have it read current position, subtract previous position and save current position in previous. If you have any sort of closed loop position control then you will probably need to do this as part of your compensation loop. John Eaton !hpvcfs1!johne
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!uakari.primate.wisc.edu!sdd.hp.com!hp-pcd!hpvcfs1!johne From: johne@hpvcfs1.HP.COM (John Eaton) Newsgroups: comp.lsi Subject: Re: velocity sensing for robotic joints Message-ID: <3230001@hpvcfs1.HP.COM> Date: 22 Aug 90 16:07:33 GMT References: <1990Aug7.205751.21206@ecf.utoronto.ca> Organization: Hewlett Packard, Vancouver, WA Lines: 15