DS 1 Attitude Control System PDE Flight Computer SRU He N PDU z facing thrusters x facing thrusters BC GDE PASM DSEU Livingstone reconfigured modes using one step commands. But how does the flight computer really open a valve? PEPE Requires turning on device drivers Requires repairing bus controllers Sending commands Powering down devices Massachusetts Institute of TechnologyArtificial Intelligence & Space Systems Laboratories Massachusetts Institute of Technology DS 1 Attitude Control System z facing thrusters x facing thrusters 1553 bus Commands DataN2H4 He PDE SRU PDU GDE PASM DSEU PEPE BC Flight Computer PDE Livingstone reconfigured modes using one step commands. But how does the flight computer really open a valve? • Requires turning on device drivers • Requires repairing bus controllers • Sending commands • Powering down devices . .