WOLFRAM SYSTEMMODELER

RRate

Restricted rate element

Diagram

Wolfram Language

In[1]:=
Click for copyable input
SystemModel["SystemDynamics.Rates.RRate"]
Out[1]:=

Information

This is the System Dynamics restricted Rate element, whereby the rate itself is determined by a single variable in its laundry list. The indicated direction of mass flow denotes the direction of true mass flow. If the control signal of the rate assumes a negative value, no mass will flow. If the control signal of the rate assumes a too large positive value, the mass flow will be limited to its allowed maximum value.

The restricted rate element should e.g. be used to model a kitchen faucet. The valve can be opened or closed, but there is a limit to how much water per time unit you can get out of the faucet, and no manipulation of the faucet will ever make water flow from the sink back into the faucet.

Public Parameters (2)

minFlow

Value: 0

Type: Real

Description: Smallest allowed flow

maxFlow

Value: inf

Type: Real

Description: Largest allowed flow

Outputs (1)

rate

Type: Real

Connectors (3)

u

Type: RealInput

Description: Signal inflow variable

y

Type: MassOutPort

Description: Mass inflow variable

y1

Type: MassOutPort

Description: Mass outflow variable

Components (1)

Limiter1

Type: Limiter

Used in Components (7)

Service_Sector_Investment

SystemDynamics.WorldDynamics.World3

Investments in the service sector

Population_Dynamics

SystemDynamics.WorldDynamics.World3

Population dynamics

Pollution_Dynamics

SystemDynamics.WorldDynamics.World3

Pollution dynamics

NR_Resource_Utilization

SystemDynamics.WorldDynamics.World3

Utilization of non-recoverable natural resources

Land_Fertility

SystemDynamics.WorldDynamics.World3

Land fertility

Industrial_Investment

SystemDynamics.WorldDynamics.World3

Investments in the military/industrial sector

Arable_Land_Dynamics

SystemDynamics.WorldDynamics.World3

Arable land dynamics