Fall 2021
This group project involved creating a sumo robot to for a class competition. We were given a kit for the first round of the competition, then the robot was to be modified to improve its chances.
Two of the kit sumo robots in the regulation ring
Earlier in the semester we were given a base kit that we could not modify in any way, and we had to program our robots to push others out of the ring. My 2 person group was successful in this event placing 1st in the class, so we were eager to repeat this success in the next round.
There were no rules besides budget restrictions for our improved design. The original kit was a light frame two continuous servo motors and all the electronics on a breadboard exposed on the top. The wheels were also exposed outside of the frame. Group size for the second round increased to 4, so 2 kits worth of parts were available. My group decided to increase the robot's defensive ability with a new frame, and combined servos from both kits to create a gearbox that would give us more pushing power.
I designed this gearbox over Thanksgiving break to use on our robot. The goal was to increase our robot's speed and but use 4 servos to make up for reduced torque.
I designed the new frame to be laser cut since our 3d printing time at school was limited.
Our group did not have enough time to test before our in-class competition and we ended up driving ourselves out of the ring. We finished 6th in our in-class event, but after some more testing we were able to tune thresholds for the sensors in time for the inter-class competition on the weekend. This event happened during the fall cornerstone showcase, and teams from different classes signed up to compete. We managed to win this event, and it was also very interesting to see other groups' approach to solving the sumo robot problem.
Spring 2022
This project involved working in a small group to create a robot of any sort that solved a problem of our choice.
Create a robot that makes gardening easier for an aging population.
My group wanted to create a gardening robot that could automate as much of the gardening process as possible. Ideally this robot would be able to operate like a robotic lawn mower and work around the clock to monitor, weed, plant, and tend a garden. The scope of the project had to be reduced to accommodate our time frame however, so we chose to try to solve seeding first.
Exploded view of the frame of the robot
Labeled image of the final electronics
Screen capture of the SolidWorks model of the robot
Actuated plowing arm
Actuated seed dispenser
High-torque geared motors
Treaded wheels
Durable frame
Optional radio control
The acrylic plowing arm in the lowered position
Seed dispenser mechanism
The robot prototype we made was able to dig trenches in loose soil and the seeding mechanism was successful at dispensing seeds at regular intervals. It was possible to program the robot to follow simple patterns in the dirt, and generally it achieved most of what it was designed to do.
We had problems with the wheels losing traction on uneven ground however, since only two of our wheels were driven and there was no suspension system. Additionally, there were some problems turning on the spot since the outer wheels would catch on the ground. The small size and weight of the robot also made it difficult to apply enough force to dig on packed soil.
If the project had continued I would have liked to add some weeding capabilities as well as the monitoring we had discussed at the beginning of the project. Overall, the project was successful, but suffered from problems due to its small scale.