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Unread 14-05-2015, 17:28
MrRoboSteve MrRoboSteve is offline
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AKA: Steve Peterson
FRC #3081 (Kennedy RoboEagles)
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Re: Brownout behavior - alternative design goals

Updated:

1. It will always be possible for the roboRIO to have less power than it needs to run, so load shedding features will continue to be useful for the great majority of teams.

2. Might be possible for the roboRIO to tolerate longer periods of low voltage. That said, robots operating for extended periods at 7 volts are visibly sick.

3. As FTAA, the only way I knew a robot was in brownout was to go stand behind the drivers and watch the display. We need to make brownout on the robot more visible, to avoid situations like the one Joe describes. Ideas:
a. FMS field monitor should show "brownout count" statistic, separately showing stage 1 and 2
b. DS software should have a brownout indicator that stays lit if there's been a brownout
c. DS stack light should change state for a second or so when there's a brownout

4. It's difficult to change the voltage of the stage 2 brownout, because it's a function of the power supply architecture.

5. It would be interesting to collect DS logs of machines in brownout, to see if at the point of outage the voltage has a steep slope. This would help assess the utility of changes to how stage 1/2 brownouts work.
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2016-17 events: 10000 Lakes Regional, Northern Lights Regional, FTC Burnsville Qualifying Tournament

2011 - present · FRC 3081 Kennedy RoboEagles mentor
2013 - present · event volunteer at 10000 Lakes Regional, Northern Lights Regional, North Star Regional, Lake Superior Regional, Minnesota State Tournament, PNW District 4 Glacier Peak, MN FTC, CMP
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