Translational Friction
Purpose
Ideal translational stick/slip friction
Library
Mechanical / Translational / Components
Description
The Translational Friction models any combination of static, Coulomb and
viscous friction between two flanges in a translational system. While the
component is stuck, it exerts whatever force is necessary in order to maintain
zero relative speed between the flanges, up to the limit of the breakaway
force . When the breakaway force is exceeded, the flanges begin sliding
against each other, and the component exerts a force that consists of the
Coulomb friction force
and a speed-dependent viscous friction force
.
The figure below shows the speed/force characteristic and the state chart of the component. Note that the friction force is opposed to the movement, hence the negative sign.
Parameters
- Breakaway friction force
- The maximum magnitude of the stiction force
, in Netwon. Must be greater than or equal to zero.
- Coulomb friction force
- The magnitude of the (constant) Coulomb friction force
, in Netwon. Must be greater than or equal to zero and less than or equal to the breakaway friction force.
- Viscous friction coefficient
- The proportionality coefficient
that determines the speed dependent viscous friction force, in
.
Probe Signals
- Force
- The transmitted force
flowing from the unmarked to the marked flange, in Newton (N).
- Speed
- The speed
of the marked flange with respect to the unmarked flange, in
.
- State
- The internal state of the component: -1 sliding backward, 0 stuck, +1 sliding forward.