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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Aerospace Science an...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Aerospace Science and Technology
Article . 2016 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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Robust off-line control allocation

Authors: Fabio A. de Almeida;

Robust off-line control allocation

Abstract

Abstract This work presents a novel scheme for robust constrained control of multivariate over-actuated systems. It combines two well-known control techniques for systems with limitations: control allocation and reference governor. With allocation of control, the number of manipulated variables is reduced to only three aerodynamic moments around the aircraft body axes, simplifying considerably the subsequent control synthesis. To improve the robustness of the operation that converts virtual into real control inputs, the robust set of attainable moments is defined, which accounts for several uncertainties in the vehicle control effectiveness. This set is then treated as the main system constraint in a new form of reference governor. The virtual input is calculated based on feedback of estimated states and feedforward of the steady-state aerodynamic moment, but the reference is governed in order to guarantee constraint satisfaction. A sequence of off-line polyhedral projections eliminates the need of on-line optimization for the computation of control actions. The complete control method is then illustrated with two design cases. Simulations are conducted with two fighter aircraft models, in the presence of uncertainties on control and stability derivatives, as well as large variations in flight conditions. Results demonstrate satisfactory performance while tracking demands of large amplitude, with proper and admissible distribution of control effort.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
16
Top 10%
Top 10%
Top 10%
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