Why drive over the ramp - just knock them down from the starting position. Why waste the time.
Yo Ho Blow the Boxes Down…
Beware of the fan jet bot
but its a fine match to our Bagel Wall of doom
*Originally posted by ahecht *
**190’s robot should be able to reach the top in 3 seconds this year. Control won’t be a problem either. I can’t say much more than that. **
We’ve already ended the game within three seconds! Looks like u have to become quicker! Muahahahahaha:eek:
*Originally posted by ChrisA *
**Anyone want to fill me in on how fast y’all are planning to accelerate? And how do you plan to compensate for going at such high speeds around corners? **
You tweak the program just right so you are on two wheels without tipping, 100% of the time :yikes:
fast is whatever we say it is
Our robot can go about 12ft/sec and can get to the ramp in auton mode in just about under 3 seconds, pretty impressive don’t you think? 
Hmmm… I am surprised at all the talk, and no one really willing to give a number.
When we tried out our autonomous programs, we were able to get up to the bins in about 4 seconds. We didn’t formally time it. We used several different methods, but the four seconds is running at half speed or less for accurracy until you are lined up on the ramp. Then we accelerate to go up to the stack. Oh, BTW we are only an 8 ft/sec 'bot.
And yes, if you hit the stack low and fast it sends many bins the wrong way. If you hit the second bin high and not too fast, the entire stack tips over the way you want it to.
My question is… Now that you and three other robots are jammed into the space at the top of the ramp with ten seconds left in autonomous, whatcha gonna do now? Frankly, we haven’t decided for sure whether we should let ourselves get caught in that tangle.
I think the swing arm aproaches are great, and avoid other problems. My only question for teams doing that is what happens to your crank when your swinging arm encounters a stopping force. It is one thing to test a swing arm against bins, and entirely another to test against bins being pushed the other way. I am curious whether anyone actually tried that.
DPC.
*Originally posted by David.Cook *
**I think the swing arm aproaches are great, and avoid other problems. My only question for teams doing that is what happens to your crank when your swinging arm encounters a stopping force. It is one thing to test a swing arm against bins, and entirely another to test against bins being pushed the other way. I am curious whether anyone actually tried that.DPC. **
Good question. We went to the Chatsworth Scrimmage with our “swing arm”, but our opposition in those matches didn’t reach the top in time to oppose our arm. We will have to wait for the Arizona regional to find out what happens when a really fast robot, or another arm like Team 234’s, pushes against our arm rotation.
Team 234 will be competing this weekend at VCU, and although their arm is very different than ours, I am sure our team will be interested to see how their arm does in actual competition.
our bot is 6fps and hits the ramp in 4.034 seconds.
we have yet to see how this works out
We have tested and repeated several times now and we get to the top in an average of 2.2 seconds. Our fastest was 2.0 and our slowest was 2.4 (averaging all the trials). When I say the top I mean contact with the bins. We stopped the time as soon as the robot made bin contact. We have an identical practice bot and are tweaking, because my calculations show we should be at 1.9 seconds. I know what you’re thinking, but let me just say this: I used differential equations to model the behavior of our robot on this year’s playing field and so far everything except the final time is mapping within a few percent.
-Paul
P.S. - we don’t want to be king of the hill, just king of the bins.
*Originally posted by Paul Copioli *
**We have tested and repeated several times now and we get to the top in an average of 2.2 seconds. Our fastest was 2.0 and our slowest was 2.4 (averaging all the trials). When I say the top I mean contact with the bins. We stopped the time as soon as the robot made bin contact. We have an identical practice bot and are tweaking, because my calculations show we should be at 1.9 seconds. I know what you’re thinking, but let me just say this: I used differential equations to model the behavior of our robot on this year’s playing field and so far everything except the final time is mapping within a few percent.-Paul
P.S. - we don’t want to be king of the hill, just king of the bins. **
I just looked at a picture of your robot. I am amazed that you can get to the bins so fast. How do you avoid tipping over going around the corner?
If we qualify for the championships and meet up with you in Houston, I hope we are on your team.
Originally posted by ahecht
190’s robot should be able to reach the top in 3 seconds this year. Control won’t be a problem either. I can’t say much more than that.
Control won’t be a problem? I watched the videos from UTC matches it looks like you need a lot of help. Not once did you make it to the top under the auto mode.
You might make it to the top in 3 seconds but it has not happen yet.
And by the way it looks like if someone puts a bin in front of your robot the robot does not do well.
I see you are a little top heavy. Having a robot be able to flip you now is not a good thing.
*Originally posted by Mike Norton *
**Control won’t be a problem? I watched the videos from UTC matches it looks like you need a lot of help. Not once did you make it to the top under the auto mode.You might make it to the top in 3 seconds but it has not happen yet.
And by the way it looks like if someone puts a bin in front of your robot the robot does not do well.
I see you are a little top heavy. Having a robot be able to flip you now is not a good thing. **
Thanks for the compliments.
Just to let you know, our “INS” was not installed at the UTC scrimmage, we were running off “dead reckoning” - the reason it looked like a bin gave us problems was really because the program was not done correctly.
If you watched all of the UTC matches, you would see that in our final match we were able to successfully get to the top of the ramp under autonomous, in low gear.
If you are going to post something negative about a robot, at least have correct information.
Thanks, looking forward to seeing everyone tomorow at BAE
Tom
I’m good friends with a member of 190, and as he explained several things not just ins were not in order. they weren’t truly topheavy, but their wing mechanism wasn’t collapsing as designed. WPI has an excellent robot, and it’s fast, however… I do think that 3 seconds is overestimating yourselves again. Chris said about 5 seconds.
At the UTC scrimmage they took 10-12 seconds in dead reconing, and were the only bot to knock down ~70% of the stack. They were ahead of many teams even then.
871 is in about the same time range of 5 - 5.5 seconds.
Great job guys, i wanna see this INS in action. and how you guys did that after or at houston.
The bot from Oakwood (Ralph II) should be able to get to the stack in about 1.5 seconds based on previous testing before shipping. We dont have to move so we dont have to be horribly fast. We should be able to knock down about 80% of the boxes if we measured angles correctly. Anyways, hope to see a lot of you at SoCal. Peace.
Our robot uses dead reckoning and makes it to the top in 3 seconds and can knock about half of the totes into our scoring zone. We were able to see this happen at UTC but our program was not quite finished so we didn’t get as many boxes as we had hoped.
How many people are actually able to get the top in under 5 seconds, and are you using line tracking or dead reckoning to get to the top?
DougHogg,
It looks like we are top heavy, but in fact 95 lbs (including battery) of our robot is located below 9 inches. The framework above is basically aluminum tubing, with the exception of one motor.
We have steering wheels that control our circle diameter and dynamic wheel speed control to slow down the inside wheels based on steering angle. This reduces the amount of skid that our robot has when cornering.
-Paul
wow, anything under 3 seconds is very impressive
and very useful
my question is, how many autonomous modes work for people?
from what i hear, not very many
*Originally posted by soezgg *
**wow, anything under 3 seconds is very impressiveand very useful
my question is, how many autonomous modes work for people?
from what i hear, not very many **
We estimate we get there in about 4-5 secs. Our dead reckoning auto mode works perfectly on a scale field (with the correct surfaces) but has not been tested in actual competition. We will know in less than a week.
We have 7 fully functional autonomous modes that have been tested but werent perfect when we shipped due to the lack of a full field to test on. our last one is in its final stages right now but we wont know if it works till next Thursday at the UTC competition.