Generic Structures First-Order Negative Feedback

12D-4475-2This last equation uses the simpler structure of examples 1 and 2.3. The Generic StructureNow examine the generic structure of negative feedback systems used in all 3examples. First, a model of the generic structure will be presented. All 3 examples can bemodeled using the general form of the generic structure. Then, the model equations forboth cases — using a draining fraction or using a time constant — will be examined.Lastly, the characteristic behaviors of the model will be discussed.3.1 Model Diagramstockflowgoal for stockadjustment gapFigure 5. Generic Modeldraining fractionFigure 5 shows the generic structure of a negative feedback loop. This model ofthe generic structure can model examples 1, 2, and 3 as well as similar systems.3.2 Model EquationsThe equations for the generic structure arestock(t) = stock(t – dt) + ( – flow) * dtDOCUMENT: This is the stock of the system. It corresponds to the amount ofradioactive compound, the mule population, or the number of employees of a firm in theexamples above respectively.UNIT: unitsOUTFLOWS: