AixLib.Fluid.Actuators.Dampers.Validation.PressureIndependent

# .AixLib.Fluid.Actuators.Dampers.Validation.PressureIndependent

Test model for the pressure independent damper model

## Information

This model validates AixLib.Fluid.Actuators.Dampers.PressureIndependent by comparing it with

- an exponential damper model which opening is the one computed by the pressure independent model, see `damExp`,
- an exponential damper model which opening is computed by a PI controller tracking the same discharge mass flow rate, see `damExpPI`.

The simulation consists in exposing these three models to

1. a first increase in the pressure drop at the damper boundaries, from negative to positive values, with a zero input control signal,
2. a consecutive increase of input control signal, from zero to one, with a constant pressure drop at the damper boundaries,
3. an eventual decrease in the pressure drop, from positive to negative values, with an input control signal equal to one.

One can notice a small variation of the computed damper opening in the last transient around flow reversal. This is because the expression of the flow coefficient as a function of the mass flow rate and pressure drop is ill-defined near zero flow rate and the damper opening value results from the regularization process.

## Contents

Name | Description
--- | ---
Medium | Medium model for air

## Revisions

- April 5, 2020 by Antoine Gautier:
  First implementation.

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