Students Win $10,000 Grant to Build 3D-Printed Prosthetics for Dogs

Stevens Institute of Technology team to help a German shepherd walk freely, thanks to EPICS in IEEE

2 min read
Image of Buddy and the researchers smiling.
Buddy with the team from the Stevens Institute of Technology, in Hoboken, N.J., that is helping to build a motorized prosthesis for the German shepherd.
Photo: Mey Olivares Tay/Stevens Institute of Technology

THE INSTITUTEA German shepherd that lost part of his leg will soon have a new motorized prosthesis, thanks to the Iota Delta chapter of IEEE Eta Kappa Nu (IEEE-HKN) and volunteers at the Stevens Institute of Technology, in Hoboken, N.J.

Buddy was abandoned last year outside of Animal Care Centers of NYC in Brooklyn. Shelter workers believe his left hind leg was ensnared in a wire or wrapped in a rubber band and became infected, causing 1-year-old Buddy to gnaw off his foot and part of his ankle. To save the dog’s life, a veterinary team amputated the bottom part of the leg and attached a prosthesis. The prosthesis gives Buddy a limited range of motion, however. The veterinary team says they expect the limitation would ultimately result in hip dysplasia, which likely would limit the dog’s use of his hind legs.

Figure of Buddy's measurements Figure of Buddy’s measurements. Photo: Mey Olivares Tay/Stevens Institute of Technology

After watching a TV news story about Buddy, the Stevens team—consisting of graduate students, undergrads, and professors—decided to take action. They applied for a grant and received US $10,000 from EPICS in IEEE, a program designed to empower high school and college students to use technical solutions to aid communities. With the grant money, the team plans to build a motorized transtibial—below-the-knee—prosthesis using 3D modeling and printing.

IEEE Member Damiano Zanotto, an assistant professor of mechanical engineering at Stevens, is the team’s lead. He says such a prosthesis has never been created for a dog due to cost and weight limitations. Recent developments in more compact and lightweight components—such as sensors, controllers, and battery packs—now make it possible, he says.

Potential Scalability

The team is working to finish the prototype of the prosthesis and ultimately plans to build an adaptive, rugged model equipped with a motor, a microcontroller, a linear potentiometer, and an inertial measurement unit. The potentiometer can help to minimize Buddy’s energy exertion, while the inertial measurement unit reports on his body’s specific force and orientation.

Image of a researcher measuring the prosthetic. Stevens team member measuring Buddy’s current prosthesis. Photo: Mey Olivares Tay/Stevens Institute of Technology

Zanotto says one of the highlights for the team has been getting to meet Buddy. In addition to some playtime, the team was able to measure the dog’s gait and collect other data in order to ensure his movement with the prosthetic device is as natural as possible, reducing the chances of a future hip injury.

Advancements in rapid prototyping technologies, especially in 3D scanners and printers, allows for protheses to be more easily customized and altered, Zanotto says.

The team says the prosthesis, which it expects to complete by the end of the year, eventually could be modified to fit not only German shepherds like Buddy, but also a variety of dogs.

EPICS in IEEE is funded by donations to the IEEE Foundation.

Currenti, an IEEE Educational Activities intern, is pursuing a master’s degree in voice and opera at the University of Maryland in College Park.

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Can This DIY Rocket Program Send an Astronaut to Space?

Copenhagen Suborbitals is crowdfunding its crewed rocket

15 min read
Vertical
Five people stand in front of two tall rockets. Some of the people are wearing space suits and holding helmets, others are holding welding equipment.

Copenhagen Suborbitals volunteers are building a crewed rocket on nights and weekends. The team includes [from left] Mads Stenfatt, Martin Hedegaard Petersen, Jørgen Skyt, Carsten Olsen, and Anna Olsen.

Mads Stenfatt
Red

It was one of the prettiest sights I have ever seen: our homemade rocket floating down from the sky, slowed by a white-and-orange parachute that I had worked on during many nights at the dining room table. The 6.7-meter-tall Nexø II rocket was powered by a bipropellant engine designed and constructed by the Copenhagen Suborbitals team. The engine mixed ethanol and liquid oxygen together to produce a thrust of 5 kilonewtons, and the rocket soared to a height of 6,500 meters. Even more important, it came back down in one piece.

That successful mission in August 2018 was a huge step toward our goal of sending an amateur astronaut to the edge of space aboard one of our DIY rockets. We're now building the Spica rocket to fulfill that mission, and we hope to launch a crewed rocket about 10 years from now.

Copenhagen Suborbitals is the world's only crowdsourced crewed spaceflight program, funded to the tune of almost US $100,000 per year by hundreds of generous donors around the world. Our project is staffed by a motley crew of volunteers who have a wide variety of day jobs. We have plenty of engineers, as well as people like me, a pricing manager with a skydiving hobby. I'm also one of three candidates for the astronaut position.

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