Port Volumes - MapleSim Help

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Hydraulic Port Volumes

	Description
	Some hydraulic models have optional volumes connected to their ports that are instantiated when the corresponding Use volume X boolean parameter is set to true (checked). When a port volume is enabled, the icon changes to show an oval volume connected to the port. The following equations are added to the model. The $K$ parameter is the bulk modulus of the fluid.

	Equations
	$q_{VX} = {\begin{array}{c} \frac{d V_{f_{X}}}{d t} & Use volume X \\ 0 & otherwise \end{array}$ $V_{f_{X}} = V_{X} (1 + \frac{p_{X}}{K})$

Variables

Name	Units	Description	Modelica ID
$p_{X}$	$Pa$	Pressure at port X	pX
$q_{VX}$	$\frac{m^{3}}{s}$	Flow rate into port X's optional volume	qVX
$V_{f_{X}}$	$m^{3}$	Effective volume at port X	VfX

Connections

Name	Description	Modelica ID
$portX$	Hydraulic port	portX

Volume Parameters

Name	Default	Units	Description	Modelica ID
Use volume X	$false$		When true a hydraulic volume chamber is added to portX	useVolumeX
$V_{X}$	$1 \cdot 10^{−6}$	$m^{3}$	Volume of chamber X	Va

See Also

Hydraulics Library

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