Mechanical and Materials Engineering (MME) 

Undergraduate Research Projects Showcase (URPS)

Abstract:

Cryogenic liquids play a critical role in cooling systems for space-based electronics, including satellites, future AI-driven data centers, liquid rocket fuel management, and more. The boil-off that occurs in cryogenic tanks results in a loss of valuable liquids due to localized heat gained from the surroundings.

This MQP analyzed, designed, and fabricated a thermal storage tank with flexible electrohydrodynamic (EHD) conduction pumping electrodes embedded on its inner surfaces. Under a low electric field, conduction is mostly due to ions that are generated by dissociated molecules. However, under a larger electric field, dissociation exceeds the rate of recombination, producing a directional net flow.

These smart, flexible EHD pumps are lightweight, low-volume, vibrationless, maintenance-free, and scalable from the macro to the microscale. The purpose of the EHD conduction pump electrodes was to effectively mix and homogenize the liquid to prove that they could help avoid local boil-offs.

Abstract:

This MQP established a foundation for enhancing the Worcester Polytechnic Institute (WPI) neutron generator. Used primarily for academic research, the neutron generator provides a critical resource for neutron activation analysis and other WPI projects.

Following a design and prototyping approach, the team identified three areas for improvement: the vacuum chamber seals, the fusion target heat exchanger, and the neutron moderator block. They then developed a test stand to evaluate potential solutions.

The proposal focused on making all vacuum seals testable, separating the vacuum chamber from the target heat exchanger, and ensuring that the changes did not negatively affect neutron output. Testing examined heat transfer efficiency, vacuum chamber stability, and neutron behavior through Monte Carlo simulations.

The results provided critical insights into improving the neutron generator’s operation and serve as a roadmap for future MQP projects aimed at further refinement.

Abstract:

Manufacturing of traditional guitar fretboards requires extensive craftsmanship. While extensive knowledge exists on fret installation and repair, frets still wear down and require replacement.

We designed and prototyped a unified fret-spine design that improves assembly and fretboard construction, while ensuring long-term durability and repair. The fret-spine slots into the fretboard through dovetail joints, allowing for easier removal.

We investigated manufacturing methods for small and large-scale production. Investment casting proved feasible for small scale manufacture, while extrusion-based manufacturing could work on a larger scale. We devised a fretboard design that utilized additive manufacturing to accommodate the fret-spine geometry, and compared wear, aesthetic and mechanical characteristics of potential fretboard materials.

To simulate wear from guitar playing, we designed and constructed a wear tester. We identified potential fretboard materials for use with the fret-spine design and recommend further exploration of materials and manufacturing methods to support greater accessibility to lutherie and guitar manufacturing.

Abstract:

Finley is a 3D-printed humanoid robot designed to assist in medical environments and at-home care. Based on the open source Poppy Project, Finley has evolved to perform various tasks, from retrieving objects to operating medical instruments.

The system now includes multiple specialized end effectors for pick-and-place operations and vital sign monitoring. A magnetic attachment and electrical contacts enable quick modular hand swapping using a docking station modeled after industrial tool changers.

An autonomous cart supports Finley’s operations, featuring a swapping station, storage compartments, and a custom mecanum drivetrain for precise movement. Finley’s arms have been redesigned for improved rigidity, manufacturability, and torque. Additionally, stronger wrist magnets enhance end-effector stability.

As an open-source platform, Finley is adaptable for various applications. By handling auxiliary tasks, it allows healthcare professionals to focus on critical patient care. This presentation will detail Finley’s design, implementation, and potential impact in medical and assistive robotics.