Go to Post OMG this topic again. Those who stir the pot should lick the spoon. - nuggetsyl [more]
Home
Go Back   Chief Delphi > Technical > Programming
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #13   Spotlight this post!  
Unread 19-02-2003, 09:05
Adam Y.'s Avatar
Adam Y. Adam Y. is offline
Adam Y.
no team (?????)
 
Join Date: Mar 2002
Location: Long Island
Posts: 1,979
Adam Y. is a splendid one to beholdAdam Y. is a splendid one to beholdAdam Y. is a splendid one to beholdAdam Y. is a splendid one to beholdAdam Y. is a splendid one to beholdAdam Y. is a splendid one to beholdAdam Y. is a splendid one to behold
Send a message via AIM to Adam Y.
Quote:
Because various things can affect how far your robot travels in the period of the counter. A fully charged battery will cause a robot to travel significantly faster and thus farther in the same amount of time compared to a somewhat depleted battery. If someone sets bins in front of your robot it will probably slow you down and screw up your timing as well. This is a fundamental problem with dead reckoning.
Actually there is a way to implement dead reckoning that gets rid of the above problems. Use an encoder disk. These things are circular disks with stripes of black and white running down them. Mount this disk somewhere onto the drive train. Using this and a sensor (usually infrared or banner sensors would even work) you can now calculate how far your robot has gone by reading the pulses of the sensor. A little gear ratio math and you can now figure out how far the robot is going in each pulse. Although using the timing of the controller is almost the same idea this will not get the robot off track due to differnces in speed from a fresh battery. Of course nothing can really correct a big change in the course of the robot. I am just surprised that far fewer teams went the more complicated way to do it than the simpler way.
Quote:
Break the walls? Dang... they must be really cheap then! Our team made a practice ramp and used 1/4 in. plexiglass or lexion or whatever that cheap plastic stuff they have, and I've run into it many times at full speed when testing our autonomous programs.. hasn't broken yet
It must be lexan because Plexiglas has been used at hockey games to protect the people but the barriers have been known to shatter. I think? Plus lexan is used in bullet proof windows so that does not shatter easily.
__________________
If either a public officer or any one else saw a person attempting to cross a bridge which had been ascertained to be unsafe, and there were no time to warn him of his danger, they might seize him and turn him back without any real infringement of his liberty; for liberty consists in doing what one desires, and he does not desire to fall into the river. -Mill

Last edited by Adam Y. : 19-02-2003 at 09:11.
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
autonomous mode problem on field Chris_C Programming 17 26-03-2003 19:11
Autonomous Code From Experience EbonySeraphim Programming 7 14-03-2003 21:56
Autonomous code tutorial miketwalker Programming 2 23-02-2003 12:28
Autonomous code PBoss Programming 7 14-01-2003 15:29
Autonomous Code Adrian Wong Robotics Education and Curriculum 1 18-11-2002 22:34


All times are GMT -5. The time now is 13:06.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi