Explaining Causal Influence

In the example below, DME explains that the change in pressure that led to the qualitative change in the pressure regulator is due to the pressure at the oxegen tank. Considering that there are over 160 variables involved, most of which are linked by constraint equations to the pressure at the regulator, this is an incredible reduction of complexity for the user.

DME explains that the regulator's pressure is equal to the the pressure at the oxygen tank because the isolation valve that lies between them is open (see the RCS schematic). That accounts for DME skipping the pressure at the isolation valve in the causal explanation.

Why primary-regulator A is in pass through mode

In State 10 (T=37.91sec), for primary-regulator A to be in pass through mode, the following condition must be met:

The pressure at the input-terminal of primary-regulator A (PIn[Pr-reg-A]) has to be Q< 1.75E+6 Pa ;

Continue with the tutorial to find out how DME came up with this explanation.

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