CAD Files for the Student Challenge
Teams must be between 3 and 5 students and are required to have a professor as a team mentor. Members must be full time students in an accredited University. At least 3 students must be present in-person for the October 29-30 sessions in Charlotte, North Carolina. NSF Grants are available for students attending all three days of the technical conference.
The goal of the Student Challenge is to stabilize a laser pointed at a fixed target. The laser is attached to an active isolation system that will be built by each team. Feedback for stabilization can use one or more MPU 9250 triple axis accelerometers and knife edge displacement sensors. A first test will be the ability of the isolator to maintain the laser on target at a distance of 6m. For the second test, a motor spinning an unbalanced mass will be attached to the underside of the breadboard, inducing a test vibration. The speed of the motor will then be increased while the laser is projected onto a circular target, again at distance of 6m. The performance will be assessed by the motor speed at which the pointer cannot stabilize the position of the spot within the circle. The isolation mechanism will mount directly onto breadboard plates (Newport 12x12x1/4-20). Four coil springs will be attached to the underside of the bread board plate forming compliant legs. This breadboard plate will be placed on a table in the work room where the competition will take place and the active isolation mechanism must be assembled onto the board. The angular displacement of the breadboard due to the unbalanced mass (without the additional mass of the isolation mechanism) will be limited to ±0.5 degrees. Mechblocks, voice coil actuators, voltage to current amplifiers, knife edge sensors and MPU 9250 triple axis accelerometers will be the only components used in the assembly of the isolation stage. A complete spreadsheet containing detailed information plus component STEP files will be available to all teams. A National Instruments myRIO will be supplied (if necessary) for controlling the isolator as will software to read the MPU 9250 over the SPI bus.
Judges will evaluate these projects based on design, presentation, team-work, innovation, achieving specified static and dynamic performance. The judging procedure will be described in detail before the event starts.
CAD files of all parts plus specifications can be found below. Assembly designs will need to be submitted (instructions on how to submit will follow) on or before September 22, 2017.
The judging committee will review the designs and provide feedback by October 1. On October 29, starting at 5:30 PM, students participating in the Challenge will have access to the room throughout the night to construct their designs. Doors will be closed at 8:00 AM on October 30. That day at 12:00 Noon, each team will be given 10 minutes to describe their devices and answer questions. A monetary prize will be awarded to the winning team.