FLL Trash Trek - 880 Points | Mindbreakers
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- เผยแพร่เมื่อ 1 ต.ค. 2024
- This video will let you know all about our robot for the FLL season 2015/16 Trash Trek! If you like it, please leave a Like!
--------- Links! ---------
Video created by:
/ legofan431
/ 2509tobi
Music used:
/ ultraboost
/ sandr-something-new
Very impressive Mindbreakers!
How old are your team members?
Which FLL seasons have you joined?
Will you participate in FLL Animal Allies?
Hope to see you in St. Louis for FLL Championships!
+SmartKidsRobotics Thank you!
-our members are all across from 12-16 years old
-we joined in 2002
-we will most likely participate in the next season
However, you probably won't see us in the championships this year as we didn't get ranked high enough in the semi-final to proceed
Hello there!
I'm truly amazed at how many unique designs you guys implemented on your robot! I especially like how you guys did the truck; the FLL team I mentor thought lifting was too complicated to get 110 points, but you guys made it look so easy. However, the main part of your robot I'm amazed about is it maneuverability. I understand your team used two color sensors to probably locate the white and black lines on the field and 1 gyro sensor to maintain accurate angles for your robot, but how are you able to make them perform consistently well throughout the video? My team utilizes PID for their color sensors yet still has trouble with amount of distance the loop would run for and simply sensing when the robot is between the white and the black lines in the first place. It isn't natural lighting since we make sure to guard our color sensor. As for gyro sensor, many sources on the internet have said they are unreliable and are off by ~9 degrees; how do you guys work around that issue? Any help would be appreciated.
- Mentor for FLL team 3204
+Ray B Thanks for the kind words, we really appreciate it! :D
For the color sensors: What we do is drive forwards / backwards with the speed proportional to the intensity of the line. As it gets darker the further you drive onto the line and brighter as you drive away from it, we drive back and forth until we go at a speed from -1 to 1, so we aren't stuck in the loop forever. The motors are independent of each other, so the right motor is controlled by the right light sensor etc. You can see it best at 2:08 in the video. (set the speed to 0.25)
As for the gyro sensor, the problem isn't that it is off by a few degrees, but rather the following: If you plug it in while moving it or move it as the EV3 boots up, it uses that value it's been moved by as the default value. So let's say you plug it in while it's moving 5 degrees / second, it will always increase the rotation value by 5 every second, even if it is standing completely still.
To fix this, we programmed our own "real gyro" block, that counts the time while the program is running and fixes the value.
Example: We start our 1st run straight at 0°. When we drive against the wall at 0:30, we know that we've rotated 270° degrees. So if the actual gyro block says it's now at a rotation of 320°, we know that the error is 5°/s (as we ran for 10 seconds and have 50° too much), allowing us to subtract that value and aquire the real value.
We also wait for 2 seconds once we start our program (which has been edited out so it's more interesting to watch) so we can get a rough idea of the error and move correctly until we hit a wall or stand straight at a line.
I could also send you the accoring parts of the program if you have trouble recreating it!
Hope that helps and good luck with your team! :)
+mindbreakers eV I would love if you could send me the according parts of the program at Rrahmyn@gmail.com :) I understand what you are saying, but I want to make sure my programming is similar to yours. Thank you for all the help! :D
Sehr schönes Video! Schade, dass es in Eberswalde nicht so funktioniert hat.
Liebe Grüße von den WeRobots
+werobots Danke!
Und ja, in Eberswalde war das Problem, dass sich unser Roboter immer am Seil verhakt hat, was bei uns Zuhause kein einziges Mal passiert ist.
why do you have a frame around the robot? I don't understand the purpose of it.
Emma Olson - mainly, makes the robot look cool.
There are some minor perks though, such as the color sensors are protected from ambient light. The frames also protects and stabilizes the wheels. They also creat more attachment points for their attachments.
Cages are also good for concealing wires and protecting the wheels from slipping on walls
nice one :D
Hey, wenn ich fragen darf, wie richtet ihr den Roboter immer aus und wie orientiert er sich auf dem Spielfeld?
Ausrichten tut er sich mithilfe von einem Gyrosensor und 2 Lichtsensoren.
Den Gyrosensor setzen wir immer zurück bzw. auf einen bestimmten Wert, wenn wir gegen eine Wand fahren und wir somit gerade stehen (0:29).
Die beiden Lichtsensoren benutzen wir, um entweder mit einem der beiden einer Linie zu folgen (1:07), oder um uns senkrecht an eine Linie zu stellen (1:45).
Ich hoffe, das hat deine Frage beantwortet :)
+mindbreakers eV Jo super danke! :) Euch viel Glück dieses Jahr!
CallMeDavee Dankeschön! :D
kut video
That pneumatic engine is amazing. Is that your own design? I'd love to see more detail.
+Ben At first we looked for other designs on the internet, but as those didn't really work too great, we built our own one that worked super reliable :)
To see it in more detail, we could make a LDD file, so you could even build one yourself :)
+mindbreakers eV
That would be amazing if you could, and very much in the 'open source' and sharing nature of FLL. Even if my team don't use it, it's a wonderful little machine that can teach kids a lot.
Where are you and how far did you get?
+mindbreakers eV can you make a video on how to make your robot
+Carter Brunkhorst what do you mean exactly? Do you want to know how to build it? Because if so, we have already made building instructions for the base model we could send you :)
+mindbreakers eV thanks that would be great! My email is carterjb2004@gmail.com