IRI - 2014 Team Invitations

[hrench]

Originally Posted by Pretzel

To add to that, it would be interesting to put an accelerometer on the robots to see how forceful the impact of a collision between robots is. I would imagine that it can get quite high, in terms of g-forces, but I could also be completely wrong.

I imagine you could extrapolate crash g's (decelleration) from the graph of the wheel encoders, as long as the crash was in the direction of travel. How accurate could that be?

[Aren Siekmeier]

Originally Posted by hrench

I imagine you could extrapolate crash g's (decelleration) from the graph of the wheel encoders, as long as the crash was in the direction of travel. How accurate could that be?

The dt of a drive encoder is on the scale of 0.1 ms (360 ticks/rev encoder 1:1 on 4 inch wheels at 20 ft/s), so the largest acceleration you could meaningfully measure would be something around 20 ft/s / 0.1 ms = 200000 ft/s^2 which is about 6000 G's. However, this response would have to take place in the FPGA, which the cRio is not currently programmed to do (the encoder rate is also computed in the FPGA, built-in to the image provided by FIRST - WPILib just pulls this value). Outside the FPGA, the response time is more like 10 or even 100 ms, limiting your accel to 60 G's, or perhaps even just 6 G's.

[Alex2614]

We'll be representing West Virginia with pride! I'm so excited and really hope I can make it to either volunteer or travel with MARS!

[Greg Needel]

It is with much disappointment that 2848 is not going to be able to attend IRI this year. We wanted to go so badly to play with many friends again, but there were a number of circumstances that are keeping us away.

Good luck to all the teams competing and we will be routing specifically for our fellow world champions 254, 469, and 74 and our Texas friends to bring it home.

[Thad House]

We just learned today that Shockwave WILL be going to IRI! PNW and Oregon represent!

[Meredith Novak]

Originally Posted by Greg Needel

It is with much disappointment that 2848 is not going to be able to attend IRI this year. We wanted to go so badly to play with many friends again, but there were a number of circumstances that are keeping us away.

Sadness. We will miss you!