Forced movement of a flange according to a reference position
Modelica Standard Library
The Translational Position (or Position) component generates a forced translation at the flange according to an input signal, sref
The Exact boolean parameter determine how sref is used:
When Exact is true, sref is used as-is. The input signal must be twice-differentiable.
When Exact is false (the default), sref is filtered and the second derivative of the filtered curve is used to compute the reference acceleration of the flange. This second derivative is not computed by numerical differentiation but rather by a second-order Bessel filter. The critical frequency of the filter (cut-off frequency) is defined by the parameter fcrit. This frequency should be higher than the essential low frequencies in the signal.
The Use Support Flange boolean parameter enables a support flange on the housing. When true (checked) the support flange must be connected in the drawing. When false the component is internally fixed to ground.
if Use Support Flange then fsupport=−f
If Exact is false, absolute acceleration of flange else 0
Accelerating force acting at flange
Force acting at support
Distance between flange and support
Position of flange
Position of support
If Exact is false, absolute velocity of flange else 0
Flange of component
Real input; reference position of flange in m
Conditional Support Flange
True (checked) means the reference position is treated exactly
Critical frequency of input signal when exact is set to false
Use Support Flange
True (checked) means the support flange is enabled
Coefficient of s in Bessel filter
Coefficient of s2 in Bessel filter
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.
1-D Mechanical Overview
Translational Motion Drivers
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