Summary of the complete scenario

• primary-regulator A was regulating normally,
• thrusters 1, 2, 3, 4 and 5 were working normally,
• secondary-regulator A was in pass through mode and
• the quad-check-valve was operating normally.

At T=5.00s (State 2), the operator modified the leak of leg to thruster 1. As a result, leg to thruster 1 was leaking seriously and no longer airtight. As a consequence the quantity of gas in the helium-tank (N.He-tank) was decreasing significantly faster and the quantity of gas in the oxygen-tank (N.O2-tank) was decreasing significantly faster.

At T=9.00s (State 4), the operator modified the statuses of thrusters 1, 2, 3, 4 and 5. As a result, thrusters 1, 2, 3, 4 and 5 were closed and no longer working normally.

At T=22.00s (State 6), the operator modified the statuses of isolation-valves for manifolds 1, 2, 3, 4 and 5. As a result, isolation-valves for manifolds 1, 2, 3, 4 and 5 were closed and no longer open. As a consequence N.O2-tank was sharply increasing.

At T=35.00s (State 8), the operator modified the status of isolation-valve for manifold 1. As a result, isolation-valve for manifold 1 was open and no longer closed. As a consequence N.He-tank was decreasing significantly faster and N.O2-tank was sharply decreasing.

The system was simulated from T=35.00s to T=37.91s, when the pressure at the input-terminal of primary-regulator A (PIn[Pr-reg-A]) reached 1.75E+6, which is one of its landmarks. As a result, primary-regulator A was in pass through mode and no longer regulating normally.

At T=40.41s (State 11), the operator modified the statuses of isolation-valves for manifolds 1 and 2. the status of thruster 2. As a result,

• isolation-valve for manifold 1 was closed and no longer open,
• isolation-valve for manifold 2 was open and no longer closed and
• thruster 2 was working normally and no longer closed.

At T=73.41s (State 13), the operator modified the statuses of isolation-valves for manifolds 3, 4 and 5. the statuses of thrusters 3, 4 and 5. As a result,

• isolation-valves for manifolds 3, 4 and 5 were open and no longer closed and
• thrusters 3, 4 and 5 were working normally and no longer closed.

Other Options:

• Describe all components in the Initial State
• Show Schematic for the Initial State
• Jump to State: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
• Go back to scenario introduction
• How to use this document

This page was generated by DME on Jul 14, 1995 15:05 -0800