WOLFRAM SYSTEM MODELER
CLevelGeneral System Dynamics controlling level |
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Diagram
Wolfram Language
In[1]:=
SystemModel["SystemDynamics.Levels.CLevel"]
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Information
This is the continuous controlling Level model of the System Dynamics methodology with a single inflow and a single outflow. It computes the level by integrating over the difference between inflow and outflow rates.
Once the level reaches its maximum allowed value, it sends a Boolean signal to its inflow rate element to tell it to stop sending more stuff. Once it reaches its minimum allowed value, it sends a Boolean signal to its outflow rate element to tell it to stop demanding more stuff.
Parameters (3)
| x0 |
Value: 0 Type: Real Description: Initial condition |
|---|---|
| minLevel |
Value: 0 Type: Real Description: Smallest allowed value of stock |
| maxLevel |
Value: inf Type: Real Description: Largest allowed value of stock |
Outputs (1)
| level |
Type: Real Description: Continuous state variable |
|---|
Connectors (7)
 |
u1 |
Type: MassInPort Description: Inflow variable |
|---|---|---|
|
u2 |
Type: MassInPort Description: Outflow variable |
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y |
Type: MassOutPort Description: State variable |
|
y1 |
Type: MassOutPort Description: State variable |
|
y2 |
Type: MassOutPort Description: State variable |
 |
s1 |
Type: BooleanOutput Description: Inflow control signal |
|
s2 |
Type: BooleanOutput Description: Outflow control signal |
Components (4)
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Integrator1 |
Type: Integrator Description: Output the integral of the input signal with optional reset |
|---|---|---|
 |
LessThreshold1 |
Type: LessThreshold Description: Output y is true, if input u is less than threshold |
 |
Add1 |
Type: Add Description: Output the sum of the two inputs |
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GreaterThreshold1 |
Type: GreaterThreshold Description: Output y is true, if input u is greater than threshold |