Table of Contents
Team Vision for Problem Definition Phase
- The goal of this phase was to introduce the team to their project and give them time to formulate a problem definition, project timeline, and list of achievable goals. In addition, they should have also met and interviewed their primary customer, begun preliminary research, and delegated team roles.
- The P16061 design team has accomplished all primary goals, constructing a list of customer needs, a problem statement, and defining their main use scenario. Additionally, they met with Jon Schull for an interview, observed the testing of a prosthetic for an e-NABLE user, and gained lab access for the rest of the year.
Two years ago, a research scientist and the director of the MAGIC ACT initiative at RIT, Jon Schull, saw a Youtube video of two men that connected to make a 3D prosthetic hand for a little boy in South Africa. The Google+ community, called e-NABLE, was born from Schull’s idea that many people would benefit from and/or become aware of the movement of creating 3D printed prosthetic hands for people in need. Fast forward two years and most of the focus had been on the different hand designs themselves. As an Independant Study, David Schwartz developed a prototype of a grip strength testing apparatus that is to be used to compare models and methods of the hands. The prototype functions, but lacks some of the amenities that are desired for the final design.
The goal of this project is to improve upon the prototype Schwartz created during his Independent Study. The expected end result should be able to be replicated, most importantly because of the nature of the e-NABLE community; being made up of volunteers around the globe. Other improvements include automation, continuous data acquisition, “sweep” of angles and forces being tested, adaptable to other types/models of hands, and can measure grip force as a function of input force and of finger position. Ideally, the resulting apparatus needs to be easy to use, portable and cost effective enough to be replicated by different e-NABLE volunteers.
This is the desired end state for the testing apparatus.
It allows e-NABLE users to receive immediate,
quantifiable feedback on their prosthetic designs.
Project Goals and Key DeliverablesDeliver an apparatus that is:
- Inexpensive - $200 maximum
- Adaptable to multiple e-NABLE prosthetic hand models and sizes
- Tests the grip strength and slippage of the fingers
- Continuous data acquisition
- Does not alter e-NABLE prosthetic
Customer Requirements (Needs)
Full Document is located here
Engineering Requirements (Metrics & Specifications)
Full Document is located here
- Maximum budget of $200
- Must be buildable and usable by an e-NABLE member with no help aside from instructions documents
- Cannot modify the prosthetic in order to make it fit on the testing apparatus
House of Quality
Full document is located here
Design Review Materials
- As a team, we should have finished constructing a set of 3D printed prosthetic hands, both for testing use and to familiarize ourselves with their construction. We should research current industry standards for testing prosthetics by reaching out to companies and the e-NABLE community. We should begin brainstorming solutions to our engineering constraints to more accurately deliver what our customer desires.
- Our project plan for the next phase is shown below