The Rotational Spring Damper (or Spring Damper) component models a spring and damper connected in parallel.

An optional heat port provides a thermal connection to the power dissipated in the damper; the spring-damper parameters are not temperature dependent.

$\mathrm{\tau }\={\mathrm{\tau }}_c\+{\mathrm{\tau }}_d\=-{\mathrm{\tau }}_a\={\mathrm{\tau }}_b$

${\mathrm{\tau }}_c\=c\left({\mathrm{\phi }}_{\mathrm{rel}}-{\mathrm{\phi }}_{\mathrm{rel0}}\right)$

${\mathrm{\tau }}_d\=d{w}_{\mathrm{rel}}$

${\mathrm{\phi }}_{\mathrm{rel}}\={\mathrm{\phi }}_b-{\mathrm{\phi }}_a$

$w_{\mathrm{rel}}\={\stackrel{\.}{\mathrm{\phi }}}_{\mathrm{rel}}$

$a_{\mathrm{rel}}\={\stackrel{\.}{w}}_{\mathrm{rel}}$

$\mathrm{lossPower}\={\mathrm{\tau }}_d{w}_{\mathrm{rel}}$

The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.