Robots That Can Climb Anywhere: A Project in Microgravity

By Elena Osipyan

Photo of student team on yellow aircraft
Photo | SEDS-Canada

The work done today by Canadian youth paves the way for achieving humanity’s technological prowess within space. Today’s professionals imagine robots sticking to the side of a spaceship, regardless of the material it is made of. All that is needed for adhesion is for electricity to be passed on the surface the robot stands on.

University of Alberta’s engineering students Makenna Kuzyk, Jana Gebara, and Jade Belisle performed an experiment in microgravity, utilising a robot with electroadhesive pads stuck to its wheels. Electroadhesion is a phenomenon in which surfaces stick together due to the effect of an electrostatic force. NASA has been doing research within the field since the last century, investigating how electroadhesion on spacecraft could aid astronaut locomotion, among other topics. However, what initially inspired Kuzyk was watching the Canadian Reduced Gravity Experiment (CAN-RGX) campaigns posted by SEDS-Canada online. CAN-RGXt is a national challenge in which Canadian teams of students can test out their science or engineering–related experiments in reduced gravity, on the board of the NRC Falcon 20 research aircraft, provided in association with the CSA.

Kuzyk’s, Gebara’s, and Belisle’s project went through many interactions, with the engineers initially starting off with considering testing out gecko adhesion within reduced gravity. Unlike the suction of a gecko that requires the environment below its feet to have no debris, electroadhesion works regardless of dust between the surfaces. It just requires a constant flow of electricity. The ability for the robot to adhere to surfaces was achieved through the use of electroadhesive pads. Constructed from interlaced polyurethane and conductive aluminium foil, the pads were stuck to the robot’s wheels. Electricity is run through the surface the robot stands on, and the electroadhesive force is generated. The foil was taken from an emergency blanket.

Jana says that alternatives to aluminium like conductive paint and 3D-printed metal are also of research interest — but due to the aluminium’s low cost, the foil the engineers extracted from emergency blankets remained the most cost-efficient purchase. The engineers got to test out adhesion during the 2022 CAN-RGX, which is hosted by SEDS-Canada. The organisation’s support within the experiment was noted by the engineers.

“Most of us are mechanical engineers, so it was nice to have a professional electrical engineer help us,” said Kuzyk, reflecting on the group’s experience in receiving aid from SEDS. “The CAN-RGX team was more than happy to help.” Along their journey, the engineers were introduced to professionals from the CSA, who also assisted them. Six cameras recorded the numerous flights the electroadhesive robot took. Kuzyk, Gebara, and Jade sorted through countless minutes of footage and emerged with a conclusion: the robot did stick. Their design worked. While the robot’s movement was limited, the power of electroadhesion nonetheless worked. In the future, Kuzyk, Gebara and Belisle would like to partake in improving the current electroadhesive pads, through streamlining the process of their creation and investigating more efficient designs.

Along the way, their experiment has blossomed into something more: a community initiative. The student engineers created a club titled Mission SpaceWalker on their campus. At first, it was simply the name of the team, with which they participated within CAN-RGX. However, now Mission SpaceWalker is a club for ambitious young women and minorities within the space industry. Kuzyk, Gebara, and Belisle shared their experiences of working on the experiment to many community members. As of now, they have reached over a thousand people within Alberta. They all agree that it was incredibly motivating to speak to youth. Jade reflects on her experience with a smile:

“When a little girl comes up to you and says, ‘You’re all a bunch of girls doing this cool stuff, and I can do this cool stuff too?’, I think that was definitely a good motivator.”

One day, we will see remote-controlled robots rolling on the sides of space stations, guaranteeing further safety for crew. They will be able to stick to surfaces and get into spots that are hard to reach, steep or hidden from view. The work of today’s Canadian engineering students will lead us to great heights.


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