Rotational Speed
Forced rotational speed of a flange
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Description
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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
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Connections
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Name
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Description
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Modelica ID
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Input signal
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w_ref
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Right driving flange. The flange axis is directed out of the cut plane.
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flange
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support
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Conditional Support Flange
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support
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Variables
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Symbol
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Units
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Description
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Modelica ID
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Angular acceleration of with respect to
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a
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Angle of with respect to
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phi
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Reference angle
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phi_ref
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Angular velocity of flange with respect to
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w
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Parameters
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Symbol
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Default
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Units
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Description
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Modelica ID
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Use Support Flange
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false
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-
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Enable
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useSupport
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-
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Permitted values:
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true - reference angle is treated exactly
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•
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false - input signal is filtered
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exact
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The critical frequency of the input signal filter when the exact parameter is set to false
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f_crit
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Constants
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Symbol
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Value
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Units
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Description
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Critical frequency in natural units
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