modelActuatorSignal

Partial model that implements the filtered opening for valves and dampers

Information

This model implements the filter that is used to approximate the travel time of the actuator. Models that extend this model use the signal y_actual to obtain the current position of the actuator.

See BuildingSystems.Fluid.Actuators.UsersGuide for a description of the filter.

Parameters

Type	Name	Default	Description
Integer	order	2	Order of filter
Dynamics › Filtered opening
Boolean	use_inputFilter	true	= true, if opening is filtered with a 2nd order CriticalDamping filter
Modelica.Units.SI.Time	riseTime	120	Rise time of the filter (time to reach 99.6 % of an opening step)
Modelica.Blocks.Types.Init	init	Modelica.Blocks.Types.Init.InitialOutput	Type of initialization (no init/steady state/initial state/initial output)
Real	y_start	1	Initial position of actuator

Connectors

Type	Name	Default	Description
Modelica.Blocks.Interfaces.RealInput	y		Actuator position (0: closed, 1: open)
Modelica.Blocks.Interfaces.RealOutput	y_actual		Actual actuator position

Revisions

June 10, 2021, by Michael Wetter:
Changed implementation of the filter and changed the parameter order to a constant as most users need not change this value.
This is for #1498.
April 6, 2020, by Antoine Gautier:
Add the boolean parameter casePreInd.
This is needed for the computation of the damper opening in BuildingSystems.Fluid.Actuators.Dampers.PressureIndependent.
February 21, 2020, by Michael Wetter:
Changed icon to display its operating state.
This is for #1294.
November 14, 2019, by Michael Wetter:
Set start attribute for filter.x.
This is for #1252.
October 25, 2019, by Jianjun Hu:
Improved icon graphics annotation. This is for #1225.
February 16, 2018, by Filip Jorissen:
Propagated parameter order.
This is for #891.
March 24, 2017, by Michael Wetter:
Renamed filteredInput to use_inputFilter.
This is for #665.
February 14, 2012 by Michael Wetter:
First implementation.