# Translational Damper

Viscous damper in mechanical translational systems

## Library

Mechanical Translational Elements

## Description

The Translational Damper block represents an ideal mechanical translational viscous damper, described with the following equations:

`$F=Dv$`

`$v={v}_{R}-{v}_{C}$`

where

 `F` Force transmitted through the damper `D` Damping (viscous friction) coefficient `v` Relative velocity `vR,vC` Absolute velocities of terminals R and C, respectively

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

### Variables

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

Nominal values provide a way to specify the expected magnitude of a variable in a model. Using system scaling based on nominal values increases the simulation robustness. Nominal values can come from different sources, one of which is the Nominal Values section in the block dialog box or Property Inspector. For more information, see Modify Nominal Values for a Block Variable.

## Parameters

Damping coefficient

Damping coefficient, defined by viscous friction. The default value is `100` N/(m/s).

## Ports

The block has the following ports:

`R`

Mechanical translational conserving port associated with the damper rod.

`C`

Mechanical translational conserving port associated with the damper case.

## Version History

Introduced in R2007a