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Sign Torque

Constant Torque changing sign with speed

 

Description

Equations

Variables

Connections

Parameters

Modelica Standard Library

Description

The Sign Torque component generates a constant torque that changes sign with direction of rotation.

The parameter reg selects the equation for the torque when the magnitude of the angular velocity is below w0.

Equations

τ=τflange=τconst{21+exp−100ww01reg=Exp{1w0wsin12πww0otherwisereg=Sine{1w0www0otherwisereg=Linear{1w0w1cos12πww0otherwiseotherwise

φ=φflangeφsupport

w=dφdt

if Use Support Flange then τsupport=τ

φ=φflange{φsupportUse Support0otherwise

Variables

Name

Units

Description

Modelica ID

φ

rad

Angle of flange with respect to support

phi

w

rads

Angular velocity of flange with respect to support

w

τ

Nm

Accelerating torque acting at flange

tau

Connections

Name

Description

Modelica ID

flange

Flange of shaft

flange

support

Conditional Support Flange

support

Parameters

Name

Default

Units

Description

Modelica ID

τconst

 

Nm

Constant torque

tau_constant

reg

Exp

 

Type of regularization

reg

w0

0.1

rads

Regularization below w0

w0

Use Support Flange

false

 

True (checked) enables the support port

useSupport

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

Torque Drivers