Orbit Robotics, a spinout from ETH Zurich, has developed a four-armed robot named Helios, designed for operations in microgravity environments. Unlike traditional robots that rely on legs for movement, Helios utilizes its four arms to grip and stabilize itself while performing tasks inside spacecraft. The robot's design allows two arms to anchor it to surfaces while the other two handle tools and equipment. This setup addresses the challenges of stability and functionality in a weightless environment.
Helios employs a tendon-driven system, which positions motors closer to its shoulders, reducing weight at the ends of its limbs. This design minimizes awkward movements and enhances control when handling cargo or tools. The robot also features a rolling-contact elbow joint, which aids in maintaining stability and preventing sudden movements that could disrupt operations.
Prior to Helios, the team developed a robot platform called IKARUS, which helped test various robotic movements and capabilities in simulated space conditions. Helios builds on these lessons, aiming to assist astronauts with routine maintenance tasks aboard the International Space Station (ISS), where maintenance accounts for approximately 35% of crew time.
The potential applications for Helios extend beyond maintenance; it may also play a role in satellite servicing and in-space construction as commercial space stations become more prevalent. The design of Helios reflects a shift towards creating robots specifically tailored for their operational environments, which could lead to more efficient and safer missions in space.
As the capabilities of robots like Helios expand, the role of astronauts may evolve, allowing them to focus more on scientific research and decision-making rather than routine tasks. This development raises questions about the future of human involvement in space exploration and the potential for robots to take on more responsibilities in challenging environments.
