modelProportionalSwitching

Rate of exchange is proportional to amount in stocks

Extends from Interfaces.PartialFlows.BidirectionalFlow (Generic bi-directional flow between two stocks).

Information

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ProportionalSwitching models the exchange of "mass" (conserved matter or information) between two stocks as a bi-directional flow. The rate of flow will be proportional to the amount in the connected levels times the fractional rate of flow given by the input u:

input u	direction of flow (for positive levels)	rate of flow
u ≥ 0	flow from A to B	`stockA.y ⋅ u`
u <= 0	flow from B to A	`stockB.y ⋅ \|u\|`

Notes

Depending on the structural parameter useAbsoluteLevels the direction of flow may be reversed by negative amounts in the connected stocks, which is possible, if the stocks are information levels (material stocks by definition cannot become negative).

If material stocks are connected to the ProportionalSwitching element, then useAbsoluteLevels may be set to false as the amount in the stocks cannot become negative.

If information levels are connected via the ProportionalSwitching component, then the intended behavior has to be carefully chosen.

Parameters

Type	Name	Default	Description
Structural Parameters
Boolean	useAbsoluteLevels	true	= true, if the stock levels are to be taken als absolute values otherweise a negative amount in a stock may reverse the direction of flow

Connectors

Type	Name	Description
Connectors.FlowPort	portA (from GenericFlow)	Flow from/to Stock A
Connectors.FlowPort	portB (from GenericFlow)	Flow to/from Stock B
Interfaces.Connectors.RealInput	u	Fractional rate input

Components

Type	Name	Description
RealOutput	y (from ThreeSO_rate)	Rate information
RealOutput	y1 (from ThreeSO_rate)	Rate information
RealOutput	y2 (from ThreeSO_rate)	Rate information