Integration of Wake Impact Alleviation Control System into Control System Architecture of Modern Fly-By-Wire Aircraft

Jana Schwithal; Nicolas Fezans; Dominik Niedermeier

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CEAS EuroGNC 2019

Integration of Wake Impact Alleviation Control System into Control System Architecture of Modern Fly-By-Wire Aircraft

Jana Schwithal	DLR (German Aerospace Center), Institute of Flight Systems, Braunschweig, Germany
Nicolas Fezans	DLR (German Aerospace Center), Institute of Flight Systems, Braunschweig, Germany
Dominik Niedermeier	DLR (German Aerospace Center), Institute of Flight Systems, Braunschweig, Germany

Abstract:
Wake vortices can represent a serious disturbance for encountering aircraft because they can cause sudden, unexpected aircraft reactions like strong rolling motions. This paper presents a control system, called Online Wake Identification and Impact Alleviation (OWIDIA), which has the particular purpose to alleviate these wake-induced aircraft reactions and is applied in addition to the regular flight control laws of the aircraft. The OWIDIA system uses the information of an airborne forward-looking Doppler lidar sensor about the wake vortex wind velocities in front of the aircraft. On the basis of these measurements, an online wake identification algorithm characterizes a potential wake vortex and a control module determines the control surface deflections that countervail the wake-induced aircraft response. The present paper shows the undesired interactions that can occur when combining the OWIDIA system with the basic control laws of the aircraft and demonstrates how these interactions can be prevented.

Keywords: Aircraft flight control analysis and design; Parameter estimation

View PDF CEAS-GNC-2019-005

Jana Schwithal, Nicolas Fezans, Dominik Niedermeier: Integration of Wake Impact Alleviation Control System into Control System Architecture of Modern Fly-By-Wire Aircraft. Proceedings of the 2019 CEAS EuroGNC conference. Milan, Italy. April 2019. CEAS-GNC-2019-005.

BibTeX entry:

@Incollection{CEAS-GNC-2019-005,

    authors = {Schwithal, Jana and Fezans, Nicolas and Niedermeier, Dominik},

    title = {Integration of Wake Impact Alleviation Control System into Control System Architecture of Modern Fly-By-Wire Aircraft},

    booktitle = {Proceedings of the 2019 {CEAS EuroGNC} conference},

    address = {Milan, Italy},

    month = apr,

    year = {2019},

    note = {CEAS-GNC-2019-005}

}