ASTi Telestra Service Manual Page 131

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ASTi ACE Studio Components Reference Guide Rev. M DOC-01-TELAS-CRG-4
Copyright © 2014 Advanced Simulation Technology inc. 121
7.5. Prop Rotor
Summary: The Prop Rotor component provides the composite sound for a rotating
helicopter blade.
Description: The Prop Rotor component includes the three principal sources of
noise; air noise from the movement of air over the blades, force noise from the
impact of the blade with the air medium, and thickness of noise due to the dual edge
sound sources on a blade.
The overall sound can be tuned based upon blade parameters such as radius and
blade count, with overall gain control based on both RPM and blade angle.
Control Inputs
Angle
Type Default Value
float32 1.0
Description: Provides the blade angle value.
ForceGain
Type Default Value
float32 1.0
Description: The gain for the principle component of the blade
sound due to the air force on the blade. If a function connection is
not made then this gain equals the scale factor, or it is the scale fac-
tor times the result of the selected function RPM and Blade Angle.
Connect a table function for controlling the force gain based upon
RPM and Blade Angle.
Lagfilter
Type Default Value
float32 1.0
Description: This provides a limiting filter used for fade-in and
fade-out effects.
Control Inputs
NoiseGain
Type Default Value
float32 1.0
Description: The gain for the air noise component of the blade
sound. Connect to a table function for controlling the noise gains
based upon RPM and Blade Angle.
If the function connection is not made then the noise gain equals the
scale factor, or it is the scale factor times the result of the selected
function of RPM and Blade Angle.
Output-
Gain
Type Default Value
float32 1.0
Description: Amplitude gain of prop/rotor composite sound source.
If the gain connection is blank then the gain scale factor is used as
the gain value, or the gain is the scale factor times the output result
of the control component.
Radius
Type Default Value
float32 1.0
Description: This constant is used to scale tip mach speed based on
blade radius (in meters).
RPM
Type Default Value
float32 1.0
Description: The frequency (in Revolutions per Minute) of the
blade shaft.
Thickness-
Gain
Type Default Value
float32 1.0
Description: Connect a table function for controlling the thickness
gain based upon RPM and Blade Angle.
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