Rotational Elasto-Backlash
Backlash connected in series to linear spring and damper (backlash is modeled with elasticity)
Description
Parameters
Constants
Modelica Standard Library
The Rotational Elasto Backlash (or Elasto Backlash) component consists of a backlash element connected in series with spring and damper elements which are connected in parallel. The spring constant must be positive.
In the backlash region −b2≤φb−φa−φrel0≤b2 no torque is exerted. Outside of this region, contact is present and the contact torque is basically computed with a linear spring/damper characteristic.
If the backlash parameter b is smaller than bε, the backlash is ignored and the component reduces to a spring/damper element in parallel.
During initialization, the backlash characteristic is replaced by a continuous approximation in the backlash region.
Name
Modelica ID
flangea
Left flange of compliant 1-dim. rotational component
flange_a
flangeb
Right flange of compliant 1-dim. rotational component
flange_b
heatPort
Optional heat port
General Parameters
Default
Units
b
0
rad
Total backlash
c
100000
Nmrad
Spring constant; must be positive
d
Nmsrad
Damping constant
φrel0
Unstretched spring angle
phi_rel0
Use Heat Port
false
True (checked) means heat port is enabled
useHeatPort
Advanced Parameters
φnominal
1·10−4
Nominal value of φrel
phi_nominal
State Select
prefer
Prioritize φrel and wrel as states
stateSelect
Value
bε
1·10−10
Minimum backlash
bEps
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 Springs and Dampers
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