Robotic technologies of the Flight Telerobotic Servicer (FTS) including fault tolerance

Details Robotic technologies of the Flight Telerobotic Servicer (FTS) including fault tolerance Robotic technologies of the Flight Telerobotic Servicer (FTS) including fault tolerance

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994soar.conf..112c&link_type=abstract

In its The Seventh Annual Workshop on Space Operations Applications and Research (SOAR 1993), Volume 1 p 112-120 (SEE N94-34019

Computer Science

Robotics

Aerospace Systems, Automatic Control, Extravehicular Activity, Fault Tolerance, Manipulators, Orbital Servicing, Refueling, Robot Control, Spacecraft Maintenance, Teleoperators, Telerobotics, Trusses, Flight Crews, Functional Design Specifications, Gamma Ray Observatory, Hubble Space Telescope, Space Station Freedom, Space Stations

Scientific paper

The original FTS concept for Space Station Freedom (SSF) was to provide telerobotic assistance to enhance crew activity and safety and to reduce crew EVA (Extra Vehicular Activity) activity. The first flight of the FTS manipulator systems would demonstrate several candidate tasks and would verify manipulator performance parameters. These first flight tasks included unlocking a SSF Truss Joint, mating/demating a fluid coupling, contact following of a contour board, demonstrating peg-in-hole assembly, and grasping and moving a mass. Future tasks foreseen for the FTS system included ORU (Orbit Replaceable Unit) change-out, Hubble Space Telescope Servicing, Gamma Ray Observatory refueling, and several in-situ SSF servicing and maintenance tasks. Operation of the FTS was planned to evolve from teleoperation to fully autonomous execution of many tasks. This wide range of mission tasks combined with the desire to evolve toward fully autonomy forced several requirements which may seen extremely demanding to the telerobotics community. The FTS requirements appear to have been created to accommodate the open-ended evolution plan such that operational evolution would not be impeded by function limitations. A recommendation arising from the FTS program to remedy the possible impacts from such ambitious requirements is to analyze candidate robotic tasks. Based on these task analyses, operational impacts against development impacts were weighed prior to requirements definition. Many of the FTS requirements discussed in the following sections greatly influenced the development cost and schedule of the FTS manipulator. The FTS manipulator has been assembled at Martin Marietta and is currently in testing. Successful component tests indicate a manipulator which achieves unprecedented performance specifications.

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