Subject:
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Moving Straight
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 28 Jun 1999 16:53:53 GMT
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Original-From:
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Sean Verret <sean_verret@%avoidspam%pmc-sierra.bc.ca>
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Viewed:
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792 times
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Is there anyone who has written or seen IC code that will keep a robot
moving straight with 2 DC motors and four side sensors? 2 on each
side. The main reason I ask is because one of my DC motors seems to put
out more power that the other one and this moves faster and my robot
like to turn into walls....
I'm using the analog sensor inputs with IR sensors - the values range
from 0-255
255 being can't see anything, and 0 being right against a wall..
I was thinking something like - if back left > 128 speed up left motor
or decrease right motor speed and similar scenarios for the other
sensors....
I'm asking just to save myself some time.... If anyone can help that'd
be greatly appreciated!!
Cheers
Sean Verret
Design Services
PMC-Sierra ext 2527
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Message has 4 Replies:
 | | Re: Moving Straight
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| Sean ... Probably the best way to maintain a constant heading is to use shaft encoders on both drive wheels ... monitor their rotation ... adjust one motor to give identical turn counts. The book "Mobile Robots: Inspiration to Implementation" by (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
| | | Re: Moving Straight
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| (...) Sorry, I do other things with my controllers than control robots (shame on me!). From other discussions I've seen though, I would think that you could use some feedback from the turning shafts, like optical turns counters or some such. I (...) (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
| | | Re: Moving Straight
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| I use the 9 gram Piezo gyro in my Hand Launch Glider to keep it moving level despite strong wind conditions. Could you use that in your robot as a "Rudder" input? The 9 gram Piezo gyro costs about 9,500 yen here in Japan. That is about $80.00. I (...) (25 years ago, 29-Jun-99, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | chips
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| oes anyone have a reliable source of the 68hc11 they are being obseleted by motorola and i can get less than 100... and i work for an electronics manufacturer. thanks phil (25 years ago, 28-Jun-99, to lugnet.robotics.handyboard)
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