Dual-arm robot design keeps satellites stable during repair in space

Engineers at the University of Cincinnati have developed a dual-arm robotic system designed to maintain stability during satellite repairs in orbit by using a second arm to counterbalance the movements of the working arm. This approach, called Dual-Arm Zero Momentum, addresses the challenge of maintaining orientation in microgravity, where even minor physical interactions can cause a spacecraft to spin or drift uncontrollably. Inspired by how humans use their free arm to balance on slippery surfaces, the system allows one robotic arm to perform maintenance tasks while the other automatically moves to offset disturbances in yaw, pitch, or roll, thereby stabilizing both the robot and the satellite. This innovation is particularly significant given the increasing congestion in low Earth orbit, where thousands of satellites operate and the risk of collisions and debris accumulation threatens future space missions. Robotic servicing technologies like this could extend satellite lifespans, enable repairs of damaged components, and assist in debris removal, helping to mitigate the potential cascade of collisions known as the Kessler effect. The research