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Rotational Speed
Forced rotational speed of a flange
Description
This component generates a forced angular speed at according to an input signal.
When the exact parameter is true, the reference velocity is treated exactly. This is only possible if the input signal is a differentiable function.
When the exact parameter is false, the reference velocity is filtered and the derivative of the filtered curve is used to compute the reference acceleration of the flange. This derivative is not computed by numerical differentiation but by an appropriate realization of the filter. The critical frequency (cut-off frequency) of the filter is defined by the parameter, . This value should be higher than the essential low frequencies in the signal.
The component equations are
Connections
Name
Modelica ID
Input signal
w_ref
Right driving flange. The flange axis is directed out of the cut plane.
flange
support
Conditional Support Flange
Variables
Symbol
Units
Angular acceleration of with respect to
a
Angle of with respect to
phi
Reference angle
phi_ref
Angular velocity of flange with respect to
w
Parameters
Default
Use Support Flange
false
-
Enable
useSupport
Permitted values:
true - reference angle is treated exactly
false - input signal is filtered
exact
The critical frequency of the input signal filter when the exact parameter is set to false
f_crit
Constants
Value
Critical frequency in natural units
See Also
Rotational Motion Drivers
1-D Mechanical Overview
Signal Blocks Overview
The components described in this topic are from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.
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