(Baleia / Piranha)
The Trekking category is relatively new in Brazilian competitions. Basically, the robot is required to move autonomously on a soccer field and find three bases spread across its extension and pass over them.
Baleia, our first robot in the category, has a GPS, magnetometer, Raspberry Pi, 4 engines, video camera, and a dense work of programming and computer vision to accomplish its task.
Our most current project is called Piranha, which has a brushless engine and Nvidia Jetson GPU combined with more complex image processing and control algorithms, also it is the current two-time champion in the Winter Challenge!
Baleia and Piranha side by side.
Piranha robot watching the soccer field.
Side view of Piranha.
Honda pushing the opponent.
3kg Sumo - Autonomous and RC (Ronda) and Mini Sumo 500g - Autonomous (Harpy)
Sumo consists of a position dispute between two robots in a circular arena, with the objective of pushing the opponent out. In the AUTO category, sensors are used for the robot to identify the opponent and locate itself in the arena, with its programmed strategies. While in RC (radio-controlled) we have a pilot controlling the robot.
Because it is a difficult dispute, our robots have a ramp to help the task of pushing the opponent, and in the 3kg category, powerful neodymium magnets are used at the base to increase their normal force and traction of interaction with the steel arena. This generates a virtual weight of around 100kg for the robot!
(Pterodactyl / Mamute)
In this category, the robots are autonomous and must be built exclusively with Lego pieces, with a weight limited to 1 kg. As in the case of Sumo 3kg, the objective of Sumo Lego is to push the opposing robot out of the arena. Various strategies can be used, such as using our ramp to raise the opponent's robot, reducing its normal, and flag (to confuse the sensors of the other robot and attack it from the side); each one has advantages and disadvantages, so it is necessary to develop several ones for a robot to be competitive against different assemblies. As Lego is very dynamic, you can change the details of an assembly between fights so that the robot adapts to the various opponents.
Initially created as a project for the new team members to adapt, since this is the lightest combat category, Sovai was designed and built in just 3 months, it is based on Spartacus, a ramp robot. Even with the short time of creation, he managed to win 3 fights and reach the 11th position among 42 robots in his debut.
The Antweight category, as much as it is a combat category as well as others, stands out for having a weight and size limitation so significant that the challenge of creating strength and speed with small components becomes tremendous!
At the end of 2012, the idea of participating in the Beetleweight category arose and became a reality with the Pizzaiolo project. From the beginning, he brought innovation to the category by using a horizontal spinner rotary weapon.
The armor is made with aluminum due to the weight limit, while the weapon is made of 4340 hardened steel for greater hardness. It is worth mentioning that one of the biggest challenges of this robot is its limited internal space, due to the weapon model used.
We are currently developing a new robot for the category with "EggBeater" type weapon, a vertical rotary weapon that is more compact and efficient.
Spartacus, designed for the 7th Winter Challenge edition competition, emerged from a project with little budget, being a challenge from the beginning. Competing in the Featherweight category (up to 13.6 Kg), it is a ramp-type robot, with two independent motors, using two planetary reduction boxes and a resistant aluminum armor.
Currently one of the most competitive combat robots on our team, Spartacus was the protagonist of great moments, as in the Winter Challenge IX, in 2013, when he won the first place as an undefeated champion.
Lightweight 27.2Kg (Tiger)
Tiger is a project created in 2015 in the LightWeight category (up to 27.2 Kg), one of the most disputed among the combat categories and, currently, the category that corresponds to the largest and heaviest robots in Brazil.
Its main weapon is a rotating cylindrical drum with a static axis, which not only represents one of the largest weapons in the category, but also a technical challenge for its manufacture. The drum has a single tooth and a double tooth on the opposite side, both made of 4340 hardened steel.
Also, with the encouragement of the Eldorado Research Institute, brushless engines were implemented in the project. They work without brushes, which makes it difficult to read their speed as well as controlling the motor, but they are lighter and have greater power compared to brushed motors.
Line Follower (Katiau)
Our first line-following robot, Bobby, was born from the restructuring of the previous project of the category, the ARMStrong robot. From the beginning, our goal was to improve its composition more and more, aiming to reduce its travel time.
Bobby underwent a series of improvements in his physical structure, improvements in his movement strategy, such as the use of reflectance sensors and servos, and became Katiau! Along with that, its code relies on the implementation of a great new PID Control algorithm.
Currently, we are once again reformulating the line follower project to always improve it. We will have a new robot format through the use of 3D printing and the structure of its electronic board, making it even lighter and faster.