The radio-navigation subsystem GSnoise
The sublibrary ILS of the library NAVLIB contains two different masked subsystem blocks
which implement glideslope noise signals: GSnoise1 and
GSnoise2. See the references below for
more details about the theoretical backgrounds.
Other blocks in the ILS sublibrary of NAVLIB are: Nominal ILS signals, GSerr, LOCerr, and
LOCnoise, and the example system ILS example.
GSnoise1
This block generates glideslope noise according to
AGARD R-632, assuming a constant approach speed. The user
must specify the scale length
Lgs (typically 85
m), the standard deviation
sigma_gs (usually <= 15
micro-Ampere), and the approach speed
V.
GSnoise1 doesn't have any inputs.
Outputsignal: Glideslope-noise [micro-Ampere]
GSnoise2
This block uses a glideslope noise filter according to
NASA CR-2022. The user doesn't have to specify any
parameters.
GSnoise2 doesn't have any inputs.
Outputsignal: Glideslope-noise [micro-Ampere]
Apart from the FDC user-manual, the following references contain more information about the ILS signals:
-
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
-
Anon.: Approach and Landing Simulation. AGARD report 632, Ames,
1975
-
Johnson, W.A., McRuer, D.T.: Development of a Category II Approach
System Model. NASA Contractor Report 2022, Washington D.C., USA,
1972