Go to Post It wasn't about the ROBOT, or about whether I was male or female, it was about getting to compete in something that was just SO cool. - BandChick [more]
Home
Go Back   Chief Delphi > Technical > Control System > Sensors
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
View Poll Results: Do polls make you more interested in reading a thread?
Yes 3 23.08%
No 6 46.15%
These things came with threads? 2 15.38%
I just like voting :-) 2 15.38%
Voters: 13. You may not vote on this poll

Reply
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 15-01-2014, 14:37
MaxMax161's Avatar
MaxMax161 MaxMax161 is offline
Allegedly Useful
AKA: Max Llewellyn
FRC #2791 (Shaker Robotics), FRC #1676 (Pascack π-oneers)
Team Role: Mentor
 
Join Date: Nov 2009
Rookie Year: 2008
Location: Montvale NJ\Troy NY
Posts: 174
MaxMax161 has a reputation beyond reputeMaxMax161 has a reputation beyond reputeMaxMax161 has a reputation beyond reputeMaxMax161 has a reputation beyond reputeMaxMax161 has a reputation beyond reputeMaxMax161 has a reputation beyond reputeMaxMax161 has a reputation beyond reputeMaxMax161 has a reputation beyond reputeMaxMax161 has a reputation beyond reputeMaxMax161 has a reputation beyond reputeMaxMax161 has a reputation beyond repute
What gyro and/or accelerometer do you use?

I'm interested to hear what people's experiences are with various gyro and accelerometers. Do you stick with the KOP ones, or do you have one you've been using for a while? Any fancy tricks or advice as to getting it to work nicely?
__________________
2791 Shaker Robotics (2013-present)
--Control Systems Mentor 2013-present
--Drive coach 2015-present

1676 The Pascack π-oneers (2010-2013)
--Drive coach 2011-2013
--Lead Programmer 2011-2013
Reply With Quote
  #2   Spotlight this post!  
Unread 16-01-2014, 02:11
faust1706's Avatar
faust1706 faust1706 is offline
Registered User
FRC #1706 (Ratchet Rockers)
Team Role: College Student
 
Join Date: Apr 2012
Rookie Year: 2011
Location: St Louis
Posts: 498
faust1706 is infamous around these partsfaust1706 is infamous around these parts
Re: What gyro and/or accelerometer do you use?

Quote:
Originally Posted by MaxMax161 View Post
I'm interested to hear what people's experiences are with various gyro and accelerometers. Do you stick with the KOP ones, or do you have one you've been using for a while? Any fancy tricks or advice as to getting it to work nicely?
In the past, we have used the KOP one, and we have had trouble with it climbing. (It got pretty bad in some matches last year, climbing at a rate of over 1 rps). This year, we are using an arduino based one, the name escapes me.

A "fancy trick" we are doing this year is using vision to do a check on the gyro. The vision returns x y and z displacement as well as pitch roll and yaw. The yaw in vision is the same as the gyro reading that we care about, so every 2 seconds or so, we will set the gyro reading to what vision says it actually is.
__________________
"You're a gentleman," they used to say to him. "You shouldn't have gone murdering people with a hatchet; that's no occupation for a gentleman."
Reply With Quote
  #3   Spotlight this post!  
Unread 16-01-2014, 21:44
Joe Ross's Avatar Unsung FIRST Hero
Joe Ross Joe Ross is offline
Registered User
FRC #0330 (Beachbots)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1997
Location: Los Angeles, CA
Posts: 8,559
Joe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond reputeJoe Ross has a reputation beyond repute
Re: What gyro and/or accelerometer do you use?

We have used the KOP gyro for the last several years without issue.

The main trick is to make sure the robot is stable during calibration and then reset the angle at the very beginning of autonomous. It will drift, but this minimizes the drift and has never caused us a problem during autonomous.
Reply With Quote
  #4   Spotlight this post!  
Unread 22-01-2014, 12:00
gpetilli gpetilli is offline
Registered User
FRC #1559
 
Join Date: Jan 2009
Location: Victor, NY
Posts: 285
gpetilli is a name known to allgpetilli is a name known to allgpetilli is a name known to allgpetilli is a name known to allgpetilli is a name known to allgpetilli is a name known to all
Re: What gyro and/or accelerometer do you use?

We are switching to a 9axis IMU called GY-85 available on ebay for $16 including shipping. It uses an I2C interface for accel, gyro and compass. We use the compass as the field orientation instead of integrating the gyro. Works well as long as the sensor is >20" above the motors.
Reply With Quote
Reply


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


All times are GMT -5. The time now is 08:04.

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