Blocklibrary WINDLIB
The FDC blocklibrary WINDLIB contains sublibraries with Simulink
models of wind and atmospheric turbulence. The models determine external
atmospheric disturbances, which can be connected to a non-linear aircraft
model (e.g. Beaver), because the results
are determined in terms velocity components within the body-fixed reference
frame of the aircraft. For more details about the underlying theory, see
the references at the end of this help-text.
The Wind models sublibrary contains the following blocks:
-
BLwind
Wind profile in Earth's
Boundary Layer
-
Cwind
Constant horizontal wind
The Atmospheric turbulence models sublibrary contains the following
blocks:
-
turb1
Example system which combines
UDRYD1, VDRYD1, and WDRYD1 in one subsystem
-
turb2
Example system which combines
UDRYD2, VDRYD2, and WDRYD2 in one subsystem
-
UDRYD1
Longitudinal Dryden filter with constant
coefficients
-
UDRYD2
Longitudinal Dryden filter with
velocity-dependent coefficients
-
VDRYD1
Lateral Dryden filter with constant
coefficients
-
VDRYD2
Lateral Dryden filter with
velocity-dependent coefficients
-
WDRYD1
Vertical Dryden filter with constant
coefficients
-
WDRYD2
Vertical Dryden filter with
velocity-dependent coefficients
Apart from the FDC user-manual, the following references contain more information about the wind and turbulence models:
-
M.O. Rauw: A Simulink environment for Flight Dynamics and Control
analysis - Application to the DHC-2 'Beaver', part I:
Implementation of a model library in Simulink. Delft University
of Technology, September 1993 (also contained in the STAR database of
NASA, report number NONP-NASA-SUPPL-DK-94-28027)
-
Approach and Landing Simulation, AGARD report 632, Ames, 1975.