BattleBots Returns...

Zitat von End Game - BattleBot - OYES Robotics

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DAMAGE REPORT PART 1:

Hopefully you watched Battlebots yesterday and saw our fight with @Bloodsport, we learned some painful lessons in this one that we didn't have to face during our first fight. Chris mentioned that we were actually more worried for this fight than our bout with Tombstone, this was because of the height that Bloodsport's bar hits at. We added the large wings to our wedge this season for exactly this fight, but it was almost unavoidable that we would have to take hits on the side of our weapon eventually, and matching our 40lb bar against their 80lb one is a scary thought. We started the match trying to box rush Bloodsport before it got up to speed, but Justin put down some good evasive driving, keeping us from engaging until we were both ready for it.

These early jabs looked like they were working well for us, End Game's blade was staying at speed and we were keeping bloodsport on the defensive, but it wasn't long before the punishment began to take a toll. In one of these hits our weapon was hit sideways off it's bearings, stripping all the screws on the bearing retainer, disconnecting one of the pulleys, and pushing our weapon over into the path of our own tensioner, after this you see End Game throwing sparks out the front of it's weapon occasionally during the match, and our weapon starts to slowly spin down.

A few seconds after this the final nail in the coffin lands, as we cross a killsaw slot our right-hand side drive suddenly jams to a stop, and the rear tire is ripped clean off our custom hubs and thrown clear of the robot. At the same time the front ESC dies completely, whether this was a result of damage from a fight, or just from the aggressive driving we were doing, we will never know. Our dual redundant drive systems were both left dead, or no longer in contact with the ground.

Continue on with part 2 in our next post

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Zitat von End Game - BattleBot - OYES Robotics

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DAMAGE REPORT PART 2:

Read part 1 in our earlier post

We were able to survive for another exchange by gyro-walking with what was left of our slowly disintegrating weapon, and this final hit completely removed the left-hand pulley on the weapon, jamming that up too and removing our last way to stay in the fight, at 1 minute and 10 seconds into the fight we were counted out, and the battery on our front-left drive decided it had suffered enough at the hands of our dead ESC and ignited, leaving us with a messy cleanup job to go along with our first loss.

Team End Game has always worked with the ideas of responding to issues with the bot with radical changes as soon as possible, and blaming nothing on luck, because we believe this is the only way that we will be able to catch up with people who have been in this sport for much longer than us. This fight showed us 3 different potentially game ending faults with our bot, so we put fixes in place for all of them before our next match. Firstly our pulley and bearing retaining screws on the weapon were made much longer, with the threads running all the way through the 50mm thick steel bar to make it more resistant to hits from the side. Our ESCs were tuned back with a lighter braking profile, making the robot feel “heavier” on the sticks, but keeping the heat and potentially fatal voltage backlash down. Lastly we changed to natural rubber tires on drive, which have a steel-reinforced plastic hub that needs to be replaced fairly often, but are much more resistant to tearing.

Usually people imagine that losing to your friends is the worst way to go, because they’re going to rub your face in it more than anyone else, but it isn’t like that at all. Battlebots is such a difficult campaign that we’ll support our mates on Bloodsport to put on their best possible showing in every fight they have, and if we have to take a loss, the best possible loss is the sort where we learn a lot about our own robot that we could never have found in testing, and our friends get to show the world what they’re made of. Bravo team Bloodsport, and onwards with an improved End Game in search of new prey.

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Gibt es, du wirst vielleicht verstehen warum wir das intern halten, Abmahnungen sind heut zu Tage nicht ohne, zumal die ganzen Anwälte zur Zeit ja nichts anderes zu tun haben, darum gibt es hier immer mal wieder die Anmerkung "GRA Mitglied zu sein hat Vorteile", sollte eigentlich jeder verstehen...

Zitat von Bloodsport - BattleBot - Bots 'n' Stuff Robotics

Big collisions make big sparks! Even though the fight wasn't the longest, there are a number of large divots taken out of End Game - BattleBot - OYES Robotics
's weapon! To be honest, we're not sure how some of these even came to be..

Zitat von Chomp

After each fight we do a full scan over Chomp to check for damage, that includes the 26lb hammer head that Teammate Randy is holding here. After our fight with Gamma9, the hammer head was left intact but with some razor sharp titanium burrs jutting off at odd angles. Some of us have learned the hard way that metal burrs can be nearly invisible and still cause major, deep slices into a builder's misplaced hands if not checked and sanded off ASAP.

Zitat von Chomp

Time to geek out on Chomp guts! Let’s start with the lidar system and how it’s utilized for autonomous action. ⠀
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𝗪𝗵𝗮𝘁 𝗶𝘀 𝗟𝗶𝗱𝗮𝗿 (𝗟𝗶𝗗𝗔𝗥/𝗟𝗜𝗗𝗔𝗥/𝗲𝘁𝗰…)?⠀
Lidar is an acronym for "light detection and ranging." It is a method for measuring distances (ranging) by illuminating the target with light and then measuring the reflection with a sensor, kind of like bat echolocation except with light instead of sound. Chomp is designed to use lidar to autonomously spin the turret to point at our opponents and fire the hammer when they are in range - no human in the loop.⠀
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𝗧𝗮𝗿𝗴𝗲𝘁 𝗔𝗰𝗾𝘂𝗶𝘀𝗶𝘁𝗶𝗼𝗻⠀
We get our ranging data from the 99° FOV LeddarTech M16-LSR, a wider-angle lidar model than we’ve used in previous years. It is possible for each of the 16 measurements to return multiple reflections, so we accept the one closest to the robot in each segment. The list of measurements is scanned, looking for features that project inwards toward the robot, with some careful handling of edge cases. These objects are then compared to an alpha-beta filter on the state of the current target (i.e., the thing we see that we think is our opponent). The closest object is used to update the filter state. The rules around initialization and target loss are fiddly but seem to cope with occasional sensor noise relatively well.⠀
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𝗔𝘂𝘁𝗼-𝗖𝗵𝗼𝗺𝗽 𝗖𝗮𝗽𝗮𝗯𝗶𝗹𝗶𝘁𝗶𝗲𝘀⠀
For auto-tracking, we use a PID loop (proportional–integral–derivative controller) to provide velocity commands to the turret rotation motor to keep the tracked target at the center of the field of view. The target is also used to predict when to fire the hammer. Using the IMU-measured rotation speed of the turret and the estimated velocity of the target, the position of the target relative to the turret is estimated at a time in the future corresponding to the hammer swing duration. If the hammer and the target are expected to arrive at the sample place and time and Auto-Chomp is enabled, the hammer is fired!⠀
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Zitat von Malice - Battlebots

The second biggest question we get as a team is "How much does it cost?" - Malice is one of the more expensive robots of the sport, due to the machining of our frame, and instead of publishing our 99 item excel sheet, I decided to make a pie chart. Our bae, Jackpot, only spent $4-5k on their robot! Battlebots is made up of all kinds of robots, and there is room for them all because they're all amazing!

Ich nehme mal an das ist Hypothetisch, hier Hängen auch noch einige Sponsoren dazwischen, und es wurde wahrscheinlich nichts selber gemacht, lieber machen lassen!

Zitat von BattleBots

STREAMING THIS MONDAY ON discovery+
- Don't miss the first two (of six) BattleBots Bounty Hunter tournaments. Who will become the Bounty Hunter and take on Legendary bots Icewave and Bronco⸘

Vielleicht Realistisch wenn nur Bestellt wurde, nichts selber gemacht, wenn ich dran denke was die Plasma Anlage kosten sollte die mal in Erwägung gezogen habe, denkbar immerhin ist hier alles Sonderanfertigung!