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Model-based control of the flying helicopter simulator: evaluating and optimizing the feedback controller

Hofmann, Johannes and Dittmer, Antje (2011) Model-based control of the flying helicopter simulator: evaluating and optimizing the feedback controller. CEAS Aeronautical Journal, 2 (1), pp. 43-56. Springer. DOI: 10.1007/s13272-011-0008-6 ISSN 1869-5582

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Official URL: http://www.springerlink.com/content/g568172u2k6583k0/

Abstract

The numerical evaluation and optimization of the feedback controller parameters of the model-based control implemented in the flying helicopter simulator is subject of this paper. The German Aerospace Center operates this helicopter as a flying testbed for numerous applications, e.g., pilot assistance and in-flight simulation. Initially, the elements of the model-based control are pre- sented. A genetic algorithm and the Nelder–Mead simplex method used for optimization are described. Two simple objective functions to rate parameter sets in the time domain are presented, and a Simulink model of the helicopter dynamics and the controller structure are used to find optimized sets. The first function, called ‘‘Delta Rating’’, consists of a normalized integral of the absolute error between commanded and measured states. The second function incorporates the Delta Rating, but is enhanced by a penalty on overshoots. The controllers found are further evaluated using a frequency domain approach consisting of a weighted sum of the differences in amplitude and phase, also considering the coherence at the corresponding fre- quency. Apart from the Simulink model, a ground-based simulator is used to evaluate the standard and the optimized controllers.

Item URL in elib:https://elib.dlr.de/74423/
Document Type:Article
Title:Model-based control of the flying helicopter simulator: evaluating and optimizing the feedback controller
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hofmann, JohannesJohannes.Hofmann (at) dlr.deUNSPECIFIED
Dittmer, AntjeFT-HSUNSPECIFIED
Date:26 November 2011
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:2
DOI :10.1007/s13272-011-0008-6
Page Range:pp. 43-56
Publisher:Springer
ISSN:1869-5582
Status:Published
Keywords:Model-based control, Two-degree-of-freedom control, Flying helicopter simulator, In-flight simulation, Genetic algorithm, Nelder–Mead simplex
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft (old)
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Robust Rotorcraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Deposited By: Hofmann, Johannes
Deposited On:23 Jan 2012 16:33
Last Modified:06 Sep 2019 15:24

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