modelHydroG
The bondgraphic hydraulic conductor element
Extends from Interfaces.PassiveOnePort (Partial model invoking one bondgraphic connector).
Information
The bondgraphic hydraulic conductor is a passive OnePort element. It models the turbulent flow through a hydraulic valve. The model inherits the effort and flow variables from the passive OnePort. The valve constant is modeled as a parameter.This non-linear model is formulated in conductive causality. There exists a second model, HydroR, that models the same device in resistive causality. It is useful to make use of the model in its correct causality, as Modelica may be unable to automatically turn the causality of this non-linear equation around.
The hydraulic conductor model has a preferred causality at the element.
Potential variables: e: Bondgraphic effort variable f: Bondgraphic flow variable, normalized positive for flows into the model Parameters: k: Valve constant (default value = 1)
Equations:
f = k*sign(e)*sqrt(abs(e))
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.SIunits.VolumeFlowRate | k | 1 | Hydraulic Valve Constant |
| Modelica.SIunits.Pressure | p0 | 1 | Reference pressure |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| BondLib.Interfaces.BondCon | BondCon1 (from PassiveOnePort) | Bond graph connector |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Real | e (from PassiveOnePort) | Bondgraphic effort | |
| Real | f (from PassiveOnePort) | Bondgraphic flow | |
| Real | se | Sign of e | |
| Modelica.SIunits.Pressure | ae | Absolute value of e |