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Unread 05-04-2014, 18:40
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Re: Wrong Field Measurements and Bad FMS

Quote:
Originally Posted by sarahg2543 View Post
Another issue that we encountered was that the FMS tended to malfunction, especially in the red alliance driver station. I saw a lot of robots lose their communication. The field crew said that it was due to the robot most of the time instead of replaying the match.
Not that the FMS can't be temperamental, but as has been said, it's almost always the robot. I spent 3 weekends staring at the FMS console this year and in that time:

I saw well over 100 cRIO reboots.
I saw at least 3 dozen main breakers blow.
I saw a couple dozen situations where the radio or cRIO came unplugged during a match.
I saw plenty of drivers stations freeze.
I saw drivers unplug their joysticks or the drivers station Ethernet connection mid-match.
I saw a couple of robots running dual 1080p cameras kicking up around 15 megabits of bandwidth.

The closest I saw to an actual FMS (communications) issue was that the trip time from driver's station to robot spiked across all 6 stations to 120 milliseconds for a second or two then dropped back under 5 milliseconds. (despite my own concern, no robots dropped and the teams didn't notice anything during the match) Not to say that the FMS can't be an issue, but there are a lot of other places to look first.