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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/22715

Title: Disturbance observer based control for gust alleviation of a small fixed-wing UAS
Authors: Smith, Jean
Liu, Cunjia
Chen, Wen-Hua
Keywords: Aircraft
Atmospheric modeling
Aerospace control
Aircraft propulsion
Mathematical model
Issue Date: 2016
Publisher: © IEEE
Citation: SMITH, J., LIU, C. and CHEN, W.-H., 2016. Disturbance observer based control for gust alleviation of a small fixed-wing UAS. 2016 International Conference on Unmanned Aircraft Systems (ICUAS), Arlington, VA USA, 7th-10th June 2016, pp. 97-106.
Abstract: This paper outlines a method of applying a linear disturbance observer to a small Unmanned Aerial System (UAS)to reduce the influence of unpredictable gusts on the non-linear aircraft dynamics. This work aims to show that by using a linear state-space model it is possible to estimate external disturbances and use the available control surfaces to alleviate the influence of gusts on aircraft dynamics accordingly. This paper focuses on the longitudinal channel of a small UAS to demonstrate the strategy. A baseline Linear Quadratic Regulator with Integral Action (LQI) is first developed; the disturbance observer based control strategy is then patched into this baseline controller to demonstrate the performance improvement. Simulations are conducted using the designed linear observer to alleviate various disturbance sources on a fully non-linear simulation of the UAS. This aims to demonstrate performance of an observer in a realistic situation where uncertainties between the linear observer and non-linear plant to be controlled are present.
Description: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Version: Accepted for publication
DOI: 10.1109/ICUAS.2016.7502575
URI: https://dspace.lboro.ac.uk/2134/22715
Publisher Link: http://dx.doi.org/10.1109/ICUAS.2016.7502575
ISBN: 9781467393348
Appears in Collections:Conference Papers and Presentations (Aeronautical and Automotive Engineering)

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