Lookup_SPositive

Positively sloping s-shaped lookup (centered at origin)

Diagram

Information

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Using the lookup converter →SShapedPositive the normalized current value of the stock, which is connected via the StockInfoInput connector, is used as input to the s-shaped lookup function (positively 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.

Parameters (6)

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
upperBound	Value: 1 Type: Real Description: Upper asymptote (upperBound > 0)
slope	Value: 2 Type: Real Description: Slope controls gradient of curve (s > 1)
hasConstantReference	Value: true Type: Boolean Description: = true, if the reference value for the stock is given by a constant parameter

Connectors (4)

	stockInfoInput	Type: StockInfoInput Description: Input of record with stock-related information
	u_ref	Type: RealInput Description: Reference value for stock
	y	Type: RealOutput Description: Output of output type
	u	Type: RealInput Description: Input for lookup (optional)

Components (3)

	normalizedStock	Type: DmnlInput Description: Input u will be stated as dimensionless fraction with regard to a reference value
	absoluteSensor	Type: AbsoluteSensor Description: Reports basic stock–related information
	lookup	Type: SShapedPositive Description: Symmettric S-shaped curve with positive slope around origin (0,0)