blockIntegratorWithReset

Output the integral of the input signal
Diagram of IntegratorWithResetOpen the diagram
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Extends from Modelica.Blocks.Interfaces.SISO (Single Input Single Output continuous control block).

Information

This model is similar to Modelica.Blocks.Continuous.Integrator except that it optionally allows to reset the output y of the integrator.

The output of the integrator can be reset as follows:

  • If reset = Buildings.Types.Reset.Disabled, which is the default, then the integrator is never reset.
  • If reset = Buildings.Types.Reset.Parameter, then a boolean input signal trigger is enabled. Whenever the value of this input changes from false to true, the integrator is reset by setting y to the value of the parameter y_reset.
  • If reset = Buildings.Types.Reset.Input, then a boolean input signal trigger is enabled. Whenever the value of this input changes from false to true, the integrator is reset by setting y to the value of the input signal y_reset_in.

See Buildings.Utilities.Math.Examples.IntegratorWithReset for an example.

Implementation

To adjust the icon layer, the code of Modelica.Blocks.Continuous.Integrator has been copied into this model rather than extended.

Parameters

TypeNameDefaultDescription
Realk1Integrator gain
Buildings.Types.ResetresetBuildings.Types.Reset.DisabledType of integrator reset
Initialization
Modelica.Blocks.Types.InitinitTypeModelica.Blocks.Types.Init.InitialStateType of initialization (1: no init, 2: steady state, 3,4: initial output)
Realy_start0Initial or guess value of output (= state)
Integrator reset
Realy_reset0Value to which integrator is reset, used if reset = Buildings.Types.Reset.Parameter

Connectors

TypeNameDefaultDescription
RealInputu (from SISO)Connector of Real input signal
RealOutputy (from SISO)Connector of Real output signal
Modelica.Blocks.Interfaces.RealInputy_reset_inInput signal for state to which integrator is reset, enabled if reset = Buildings.Types.Reset.Input
Modelica.Blocks.Interfaces.BooleanInputtriggerResets the integrator output when trigger becomes true

Revisions

  • November 1, 2016, by Michael Wetter:
    Corrected wrong annotation for y_reset, and made rendering of y_reset_in conditional.
    This is for #562.
  • September 29, 2016, by Michael Wetter:
    Refactored model to use a type for configuration of the integrator reset.
  • August 9, 2016, by Michael Wetter:
    Reformulated model using a conditional connector to use the same design pattern as is used in other models.
  • August 9, 2016, by Michael Wetter:
    Revised model.
  • July 18, 2016, by Philipp Mehrfeld:
    First implementation.