This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English verison of the page.

Note: This page has been translated by MathWorks. Please click here
To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

Rotational Damper

Viscous damper in mechanical rotational systems


Mechanical Rotational Elements


The Rotational Damper block represents an ideal mechanical rotational viscous damper described with the following equations:




TTorque transmitted through the damper
DDamping (viscous friction) coefficient
ωRelative angular velocity
ωR, ωCAbsolute angular velocities of terminals R and C, respectively

The block positive direction is from port R to port C. This means that the torque is positive if it acts in the direction from R to C.


Use the Variables tab in the block dialog box (or the Variables section in the block Property Inspector) to set the priority and initial target values for the block variables prior to simulation. For more information, see Set Priority and Initial Target for Block Variables.


Damping coefficient

Damping coefficient, defined by viscous friction. The default value is 0.001 N*m/(rad/s).


The block has the following ports:


Mechanical rotational conserving port.


Mechanical rotational conserving port.

Introduced in R2007a

Was this topic helpful?