Simulation Modeling of Space Missions Using the High Level Architecture
Figure 2
Top of the failure tree adapted from the reliability study of Fragola and Maggio [23], where LOV is loss of vehicle, SSME is Space shuttle Main Engines, SRB is Solid Rocket Boosters, ORB is Orbiter, ET is External Tank, FTCEGD is Failure to Contain Energetic Gas and Debris, FTMPP is Failure to Maintain Proper Propulsion, FTMPC is Failure to Maintain Proper Configuration, and SMEDS is Simultaneous Dual SSME Premature Shutdown. Probabilities of failure are also indicated.
