Lookup_JNegativeNegatively sloping s-shaped lookup |
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Diagram
Information
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Using the lookup converter →JanoschekNegative the normalized current value of the stock, which is connected via the StockInfoInput connector, is used as input to the s-shaped Janoschek lookup function (negatively sloping) to obtain the output y.
The value used for the normalization is a constant by default (referenceValue = 1); if hasConstantReference = false the optional input u is used instead.
Notes
- The reference value for normalization should be strictly positive; the divison for normalization is protected against divison by zero and will return zero in that case.
- Instead of using the current value of a connected stock, the input connector u can be used as basis by setting
hasStockInfoInput = false.
See also
Lookup_JPositive, Lookup_SPositive, Lookup_SNegative, Lookup_Table Lookup_TableOnFile
Parameters (9)
| pol |
Value: "–" Type: String Description: Polarity |
|---|---|
| referenceValue |
Value: 1 Type: ReferenceType Description: Constant reference value to normalize input |
| hasStockInfoInput |
Value: true Type: Boolean Description: = true, if the input is given by the input connector u instead of stockInfoInput |
| lowerBound |
Value: 0 Type: Real Description: Lower asymptote for u <= 0 (lowerBound < upperBound) |
| upperBound |
Value: 2 Type: Real Description: Upper asymptote for u -> infinity |
| growthRate |
Value: 2 Type: Real Description: Determines the gradient of the curve |
| x_ref |
Value: 1 Type: Real Description: x-value for point of inflection(x_ref > 0) |
| y_ref |
Value: 1 Type: Real Description: y-value for point of inflection(lowerBound < y_ref < upperBound) |
| hasConstantReference |
Value: true Type: Boolean Description: = true, if the reference value for the stock is given by a constant parameter |
Connectors (4)
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stockInfoInput |
Type: StockInfoInput Description: Input of record with stock-related information |
|---|---|---|
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u_ref |
Type: RealInput Description: Reference value for stock |
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y |
Type: RealOutput Description: Output of output type |
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u |
Type: RealInput Description: Input for lookup (optional) |
Components (3)
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normalizedStock |
Type: DmnlInput Description: Input u will be stated as dimensionless fraction with regard to a reference value |
|---|---|---|
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absoluteSensor |
Type: AbsoluteSensor Description: Reports basic stock–related information |
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lookup |
Type: JanoschekNegative Description: Janoschek's (S-shaped) growth curve with negative slope |
Revisions
- Introduced in v2.0.0.