Rotational Bearing Friction - MapleSim Help

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Rotational Bearing Friction

Coulomb friction in bearings

 

Description

Connections

Parameters

Modelica Standard Library

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 τpos parameter is a two-dimensional table (array) that specifies the torque at given angular velocities. Each row has the form w&comma;τw. The first column must be ordered, 0w1<w2<<wm. To add rows, right-click on the value and select Edit Matrix Dimension. Only linear interpolation is supported.

Connections

Name

Description

Modelica ID

flangea

Flange of left shaft

flange_a

flangeb

Flange of right shaft

flange_b

support

Conditional Support Flange

support

heatPort

Optional heat port

heatPort

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

τpos

0.&comma;1.

1

Positive sliding friction characteristic

tau_pos

peak

1

1

peakτpos1&comma;2 is the maximum friction torque at ω&equals;0

peak

Use Heat Port

false

 

True (checked) means heat port is enabled

useHeatPort

Use Support Flange

false

 

True (checked) enables the support flange

useSupport

Advanced Parameters

Name

Default

Units

Description

Modelica ID

ωsmall

1·1010

rads

The velocity reinitializes when ωωsmall

w_small

Klocked

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

Modelica Standard Library

The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.

See Also

1-D Mechanical Overview

Rotational Bearings and Gears