Bearing Friction - MapleSim Help

Rotational Bearing Friction

Coulomb friction in bearings

 Description The Rotational Bearing Friction (or Bearing Friction) component models Coulomb friction in bearings, i.e., a frictional torque acting between a flange and the housing. Torque Table The ${\mathrm{\tau }}_{\mathrm{pos}}$ parameter is a two-dimensional table (array) that specifies the torque at given angular velocities. Each row has the form $\left[w,\mathrm{\tau }\left(w\right)\right]$. The first column must be ordered, $0\le {w}_{1}<{w}_{2}<\cdots <{w}_{m}$. To add rows, right-click on the value and select Edit Matrix Dimension. Only linear interpolation is supported.

Connections

 Name Description Modelica ID ${\mathrm{flange}}_{a}$ Flange of left shaft flange_a ${\mathrm{flange}}_{b}$ Flange of right shaft flange_b $\mathrm{support}$ support $\mathrm{heatPort}$ heatPort

Parameters

General Parameters

 Name Default Units Description Modelica ID ${\mathrm{\tau }}_{\mathrm{pos}}$ $\left[0.,1.\right]$ $1$ Positive sliding friction characteristic tau_pos $\mathrm{peak}$ $1$ $1$ $\mathrm{peak}{\mathrm{\tau }}_{\mathrm{pos}}\left[1,2\right]$ is the maximum friction torque at $\mathrm{\omega }=0$ peak Use Heat Port $\mathrm{false}$ True (checked) means heat port is enabled useHeatPort Use Support Flange $\mathrm{false}$ True (checked) enables the support flange useSupport

 Name Default Units Description Modelica ID ${\mathrm{\omega }}_{\mathrm{small}}$ $1·{10}^{10}$ $\frac{\mathrm{rad}}{s}$ The velocity reinitializes when $\left|\mathrm{\omega }\right|\le {\mathrm{\omega }}_{\mathrm{small}}$ w_small ${K}_{\mathrm{locked}}$ $0$ $1$ Gain driving the relative motion between the friction elements to 0 when locked. This parameter should only be non-zero when using the model with fixed-step integration. K_locked