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Rotational Damper

Linear 1D rotational damper Description The Rotational Damper (or Damper) component models a linear velocity-dependent damper.
 Equations $\mathrm{\tau }=d{w}_{\mathrm{rel}}=-{\mathrm{\tau }}_{a}={\mathrm{\tau }}_{b}$ ${w}_{\mathrm{rel}}={\stackrel{.}{\mathrm{\phi }}}_{\mathrm{rel}}$ ${\mathrm{\phi }}_{\mathrm{rel}}={\mathrm{\phi }}_{b}-{\mathrm{\phi }}_{a}$ ${a}_{\mathrm{rel}}={\stackrel{.}{w}}_{\mathrm{rel}}$ $\mathrm{lossPower}=\mathrm{\tau }{w}_{\mathrm{rel}}$

Variables

 Name Units Description Modelica ID ${a}_{\mathrm{rel}}$ $\frac{\mathrm{rad}}{{s}^{2}}$ Relative angular acceleration a_rel ${\mathrm{\phi }}_{\mathrm{rel}}$ $\mathrm{rad}$ Relative rotation angle phi_rel ${\mathrm{\phi }}_{x}$ $\mathrm{rad}$ Absolute angle of ${\mathrm{flange}}_{x},x\in \left\{a,b\right\}$ flange_x.phi $\mathrm{\tau }$ $Nm$ Torque between flanges tau ${\mathrm{\tau }}_{x}$ $Nm$ Torque applied to ${\mathrm{flange}}_{x},x\in \left\{a,b\right\}$ flange_x.tau ${w}_{\mathrm{rel}}$ $\frac{\mathrm{rad}}{s}$ Relative angular velocity w_rel $\mathrm{lossPower}$ $W$ Loss power leaving component via heatPort lossPower

Connections

 Name Description Modelica ID ${\mathrm{flange}}_{a}$ Left flange of compliant 1-dim. rotational component flange_a ${\mathrm{flange}}_{b}$ Right flange of compliant 1-dim. rotational component flange_b $\mathrm{heatPort}$ heatPort

Parameters

General Parameters

 Name Default Units Description Modelica ID $d$ $0$ $\frac{Nms}{\mathrm{rad}}$ Damping constant d Use Heat Port $\mathrm{false}$ True (checked) means heat port is enabled useHeatPort

 Name Default Units Description Modelica ID ${\mathrm{\phi }}_{\mathrm{nominal}}$ $1·{10}^{-4}$ $\mathrm{rad}$ Nominal value of ${\mathrm{\phi }}_{\mathrm{rel}}$ phi_nominal $\mathrm{prefer}$ Prioritize ${\mathrm{\phi }}_{\mathrm{rel}}$ and ${w}_{\mathrm{rel}}$ as states stateSelect