08.08.2015 Views

Unexpected Behaviors in Higher- Order Positive Feedback Loops

Order Positive Feedback Loops - Creative Learning Exchange

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26 D-4455-2(5) rate=LevelUnits: **undef<strong>in</strong>ed**(6) SAVEPER = TIME STEPUnits: noneThe frequency with which output is stored.(7) TIME STEP = 0.0625Units: noneThe time step for the simulation.3.2 Second-<strong>Order</strong> LoopAda+INITIAL AB+dbINITIAL BFigure 16: Vensim Equivalent of Figure 3: Second-order positive feedback loopDocumentation for second-order positive feedback loop(1) A= INTEG (da, INITIAL A)Units: **undef<strong>in</strong>ed**(2) B= INTEG (db, INITIAL B)Units: **undef<strong>in</strong>ed**(3) da=B

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