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VEX U Robotics Spin Up Dual Flywheel Shooter Robot

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Akilesh Yelchuru

OVERVIEW

Built a competition robot for the VEX U Spin Up season focused on fast disk intake, accurate shooting, and reliable autonomous scoring. I led the mechanical design and CAD of multiple intake + dual-flywheel shooter iterations (SolidWorks/Onshape), integrated drivetrain-intake-shooter subsystems, and partnered with programmers to deploy odometry + PID-based autonomous routines. Result: qualified for the VEX U World Championships and improved autonomous cycle time by 30+ percent through iterative tuning and alignment.

HighlightS

  • Qualified for the VEX U World Championships; top regional contender ranking
  • Designed and iterated a dual-flywheel shooter for high fire rate and repeatable accuracy
  • Integrated drivetrain, intake, shooter, and electrical/control interfaces for full-system reliability
  • Implemented autonomous improvements using odometry + PID; cut cycle time by 30+ percent
  • Ran stress tests and match-condition benchmarks; iterated rapidly based on measured performance
  • Practiced system-level troubleshooting under time pressure in a high-stakes competition environment

SKILLS

Fusion 360Mechanical designRobot drivetrain integrationFlywheel shooter designIntake mechanism designRapid prototypingSystem integrationTest and iterationOdometryPID control tuningCompetition debuggingCross-functional collaboration

Additional Details

Problem

Design a VEX U Spin Up robot capable of fast intake, accurate shooting, and effective defense under strict time and mechanical constraints. Winning required high-speed cycling and dependable autonomous scoring early in matches.

What I Owned

  • Mechanical design ownership for intake + dual-flywheel shooter architecture

  • CAD modeling and iteration planning (SolidWorks, Onshape)

  • Subsystem integration across drivetrain, intake, shooter, and controls interfaces

  • Test plans, stress checks, and performance benchmarking to match conditions

Approach

Mechanical Design

  • Prototyped multiple intake and dual-flywheel shooter layouts

  • Prioritized lightweight structure, stiffness, and maintainability for fast cycle times

Systems Integration

  • Led fit, mounting, and packaging decisions across drivetrain, intake, and shooter

  • Coordinated wiring and control compatibility with the electrical/programming team

Autonomous Enablement

  • Collaborated with programmers to support odometry-based navigation and PID control

  • Tuned mechanical alignment and repeatability to improve autonomous consistency

Testing and Iteration

  • Benchmarked shot consistency, cycle time, and durability

  • Iterated quickly using measured results to converge before qualifiers

Outcome

  • Qualified for VEX U World Championships

  • Delivered a dual-flywheel shooter with consistent accuracy and high throughput

  • Reduced autonomous cycle time by 30+ percent via PID tuning + mechanical alignment

  • Strengthened real-world systems engineering skills: design tradeoffs, integration, and rapid debugging


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