Predicting DVOR Bearing Errors Caused by Wind Turbines - A New Tool
Abstract
The impact of scattering objects such as wind turbines (WTs) and other buildings on the VOR has been addressed
in various publications. Nevertheless, a practically feasible possibility to predict especially the Doppler VOR bearing
error during the building’s planning phase is challenging, since a electromagnetic model of that facility must replicate
its radiation with both CSB and SBO antennas in a complex scenario that is large w.r.t. the wavelength. A new time
domain method will be introduced to address this topic for dynamically disturbed environments. Separating its
frequency modulated (FM) and amplitude modulated (AM) content, the indicated bearing is calculated subsequently
by determining the corresponding phase difference. Within the research project WERAN, an UAS-based (here:
octocopter) platform with dedicated antennas, receivers and adapted signal processing was developed. Using this
device, it is now possible to measure separately small phase errors on the 30Hz FM and AM signal components.
According to the prediction, bearing errors due to existing wind farms are now traceable at specific positions in the
airspace. Hence, the numerical results can be validated by in situ measurements of real DVOR signals-in-space in
the environment of real WTs. The presentation will give an overview on the numerical method and the validation
cases.
Domains
Electromagnetism
Origin : Files produced by the author(s)
Comment : Annexe
Comment : Annexe