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Rotational Spring

Ideal spring in mechanical rotational systems


Mechanical Rotational Elements


The Rotational Spring block represents an ideal mechanical rotational linear spring, described with the following equations:


TTorque transmitted through the spring
KSpring rate
φRelative displacement angle (spring deformation)
φinitSpring preliminary winding (spring offset)
φR, φCAbsolute angular displacements of terminals R and C, respectively
ωRelative angular velocity

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.

Dialog Box and Parameters

Parameters Tab

Spring rate

Spring rate. The default value is 10 N*m/rad.

Variables Tab

Use the Variables tab 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.


The block has the following ports:


Mechanical rotational conserving port.


Mechanical rotational conserving port.

See Also

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