modelTwoWayEqualPercentage

Two way valve with equal percentage flow characteristics

Extends from BaseClasses.PartialTwoWayValveKv.

Information

Two way valve with an equal percentage valve opening characteristic.

This model is based on the partial valve model AixLib.Fluid.Actuators.BaseClasses.PartialTwoWayValve. Check this model for more information, such as the regularization near the origin.

Parameters

TypeNameDefaultDescription
RealR50Rangeability, R=50...100 typically
Realdelta00.01Range of significant deviation from equal percentage law

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.
  • August 7, 2020, by Ettore Zanetti:
    changed the computation of phi using max(0.1*l, . ) to avoid phi=0. See issue 1376.
  • February 21, 2020, by Michael Wetter:
    Changed icon to display its operating state.
    This is for #1294.
  • November 9, 2019, by Filip Jorissen:
    Guarded the computation of phi using max(0, . ) to avoid negative phi. See issue 1223.
  • April 4, 2014, by Michael Wetter:
    Moved the assignment of the flow function phi to the model instantiation because in its base class, the keyword input has been added to the variable phi.
  • March 27, 2014 by Michael Wetter:
    Revised model for implementation of new valve model that computes the flow function based on a table.
  • February 20, 2012 by Michael Wetter:
    Renamed parameter dp_nominal to dpValve_nominal, and added new parameter dpFixed_nominal. See AixLib.Fluid.Actuators.UsersGuide.
  • February 14, 2012 by Michael Wetter:
    Added filter to approximate the travel time of the actuator.
  • March 25, 2011, by Michael Wetter:
    Added homotopy method.
  • June 5, 2008 by Michael Wetter:
    First implementation.