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Wake Impact Alleviation Control Based on Wake Identification

Ehlers, Jana and Fischenberg, Dietrich and Niedermeier, Dominik (2015) Wake Impact Alleviation Control Based on Wake Identification. Journal of Aircraft, 52 (6), pp. 2077-2089. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.C033157 ISSN 0021-8669

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Official URL: http://arc.aiaa.org/doi/abs/10.2514/1.C033157


During a wake-vortex encounter, an aircraft can experience significant attitude and flight-path changes, which can represent a severe safety risk. The application of a wake impact alleviation control system can considerably decrease the aircraft’s response during the wake encounter and hence diminish the pilot workload while reducing the potential risk to the passengers, crew, and aircraft. The realization of a wake impact alleviation controller presented here is based on a forward-looking light detection and ranging (LIDAR) sensor. The information about the disturbance velocities in front of the aircraft is used to determine the control-surface deflections that compensate the wake-induced disturbance moments. The novel approach of this concept is the combination of the wake impact alleviation system with a wake identification algorithm. Because of the integration of the identification algorithm, it is possible to apply the wake impact alleviation with LIDAR sensors restricted to line-of-sight measurements only. The wake-identification-based wake impact alleviation is assessed in numerical aircraft simulations for different encounter scenarios, and a sensitivity study is performed for the parameters of the wake identification. It is shown that the alleviation system significantly reduces the wake-induced attitude change of the aircraft and thus represents a promising concept to increase safety during wake-vortex encounters.

Item URL in elib:https://elib.dlr.de/94912/
Document Type:Article
Title:Wake Impact Alleviation Control Based on Wake Identification
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ehlers, Janajana.ehlers (at) dlr.deUNSPECIFIED
Fischenberg, DietrichDietrich.Fischenberg (at) dlr.deUNSPECIFIED
Niedermeier, Dominikdominik.niedermeier (at) dlr.deUNSPECIFIED
Date:27 January 2015
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.2514/1.C033157
Page Range:pp. 2077-2089
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:wake vortex, flight control, wake online identification, wake impact alleviation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Flight Dynamics and Simulation
Deposited By: Schwithal, Jana
Deposited On:29 Jan 2015 09:39
Last Modified:08 Mar 2018 18:41

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