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Robotics used to restore full power for the Space Station
by Staff Writers
Houston TX (SPX) May 14, 2019

The Canadarm2 serves as the station's robotic arm. It's used to move supplies, equipment, Dextre and even astronauts. The robotic arm is also used to capture visiting spacecraft and attach them to the station.

Robotics ground controllers in NASA's Mission Control Center at the agency's Johnson Space Center in Houston successfully replaced a failed Main Bus Switching Unit (MBSU) on the International Space Station with a spare using robotic operations on Thursday, May 2. The operation to replace the failed unit was conducted using the station's Canadarm2 and Dextre, both part of Canada's contribution to the International Space Station.

Using complex robotic work to perform critical maintenance allows astronauts to spend more time working on scientific experiments and helps develop better technologies and procedures for future human and robotic exploration beyond low-Earth orbit.

"Developing new robotic systems is extremely important to get our astronauts back to the Moon by 2024," Robotics Operations Systems Officer Mike Ferullo said. "The techniques and methods that we are developing with Dextre and Canadarm2 are directly applicable to future missions, and the construction and repair of any Moon-based mission will be done with robotics wherever possible. It's an extremely exciting time to be involved in space robotics.

Dextre is a versatile robot used to perform routine maintenance on the station. Equipped with lights, video equipment, a tool platform, and four tool holders, Dextre's dual-arm design and precise handling capabilities reduces the need for spacewalks to conduct maintenance outside the orbiting laboratory.

The Canadarm2 serves as the station's robotic arm. It's used to move supplies, equipment, Dextre and even astronauts. The robotic arm is also used to capture visiting spacecraft and attach them to the station.

The completion of the robotics work was the second time an MBSU was swapped out without the need for a spacewalk.

"Previous replacements allowed us to review different arm configurations and the force with which we pulled the unit out," Ferullo said. "Every operation we do gives us a better understanding about how to move forward with future repairs and the support of payloads."

The failure on April 29 of the station's MBSU-3, one of four power distributors on the station's backbone truss structure, reduced the station's power supply by nearly 25 percent. Following the failure, the station crew installed a series of jumpers in the station's Unity connecting module (Node 1) to reroute power to experiments and hardware and ensure limited impact to continued station operations.

"Installing the power jumpers allowed the recovery of several critical pieces of equipment," Power and Thermal Flight Controller Jay Boucher said. "Even though the jumpers helped continue station operations, replacing the failed unit would be required to regain the redundant power supply required for the US robotic arm to capture SpaceX's Dragon cargo spacecraft that was scheduled to launch."

Dragon launched successfully on May 4 and was captured and installed on the Earth-facing side of the station two days later to deliver more than 5,500 pounds of research, crew supplies, and hardware to the International Space Station.

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Power Glitch in US Segment of ISS Fixed, Station Back to Full Power - NASA
Moscow (Sputnik) May 03, 2019
The problem with the power supply system in the US part of International Space Station has been solved and the ISS has returned to full power, NASA said in a statement on Thursday. A partial failure in the orbiting laboratory's electrical system occurred on Monday. It imposed no danger to the crew. "This morning, Robotics Ground Controllers in Mission Control Houston successfully completed an operation to remove a failed Main Bus Switching Unit-3 and replace it with a spare. "The MBSU in que ... read more

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