WOLFRAM SYSTEMMODELER

BooleanTable

Generate a Boolean output signal based on a vector of time instants

Diagram

Wolfram Language

In[1]:=
SystemModel["Modelica.Blocks.Sources.BooleanTable"]
Out[1]:=

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

The Boolean output y is a signal defined by parameter vector table. In the vector time points are stored. The table interpolation has the following properties:

  • At every time point, the output y changes its value to the negated value of the previous one.
  • Values outside of the table range, are computed by extrapolation according to the setting of parameter extrapolation:
      extrapolation = 1: Hold the startValue or last value of the table,
                         if outside of the table scope.
                    = 2: Extrapolate by using the derivative at the first/last table
                         points if outside of the table scope.
                         (This setting is not suitable and triggers an assert.)
                    = 3: Periodically repeat the table data (periodical function).
                    = 4: No extrapolation, i.e. extrapolation triggers an error
    
  • Via parameter shiftTime the curve defined by the table can be shifted in time. The time instants stored in the table are therefore relative to shiftTime.
  • If time < startTime, no interpolation is performed and false is used as ordinate value for the output.

BooleanTable.png

The precise semantics is:

  if size(table,1) == 0 then
     y = startValue;
  else
     //            time < table[1]: y = startValue
     // table[1] ≤ time < table[2]: y = not startValue
     // table[2] ≤ time < table[3]: y = startValue
     // table[3] ≤ time < table[4]: y = not startValue
     // ...
  end if;

Parameters (5)

table

Value: {0, 1}

Type: Time[:] (s)

Description: Vector of time points. At every time point, the output y gets its opposite value (e.g., table={0,1})

startValue

Value: false

Type: Boolean

Description: Start value of y. At time = table[1], y changes to 'not startValue'

extrapolation

Value: Modelica.Blocks.Types.Extrapolation.HoldLastPoint

Type: Extrapolation

Description: Extrapolation of data outside the definition range

startTime

Value: -Modelica.Constants.inf

Type: Time (s)

Description: Output = false for time < startTime

shiftTime

Value: 0

Type: Time (s)

Description: Shift time of table

Connectors (1)

y

Type: BooleanOutput

Description: Connector of Boolean output signal

Components (2)

combiTimeTable

Type: CombiTimeTable

realToBoolean

Type: RealToBoolean

Used in Examples (5)

ShowLogicalSources

Modelica.Blocks.Examples

Demonstrates the usage of logical sources together with their diagram animation

LogicalNetwork1

Modelica.Blocks.Examples

Demonstrates the usage of logical blocks

BooleanNetwork1

Modelica.Blocks.Examples

Demonstrates the usage of blocks from Modelica.Blocks.MathBoolean

Interaction1

Modelica.Blocks.Examples

Demonstrates the usage of blocks from Modelica.Blocks.Interaction.Show

CharacteristicThyristors

Modelica.Electrical.Analog.Examples

Characteristic of ideal thyristors

Used in Components (2)

RadioButtonSource

Modelica.Blocks.Sources

Boolean signal source that mimics a radio button

RadioButton

Modelica.StateGraph.Temporary

Button that sets its output to true when pressed and is reset when an element of 'reset' becomes true