Review of Multivariable Control Applied to the VAAC Harrier and Remaining Open Questions

RA Hyde

Research output: Chapter in Book/Report/Conference proceedingChapter in a book

Abstract

developed for the Defence Evaluation and Research Agency (DERA), now QinetiQ, Vectored thrust Aircraft Advanced flight Control (VAAC) research Harrier XW175, and has been previously reported [1–3]. It was developed within the Cambridge University Engineering Department (CUED) Control Group, and much of its success depended on parallel theoretical developments within the group. The design itself used loop-shaping [4], with increased understanding of how to select weights being deduced from the application. Gain scheduling was initially done using switching between controllers, but in piloted simulation the switching points were evident, even when using bumpless transfer techniques. At around this time it was shown that the loop-shaping controller could be written in observer form (see for example [5]), providing an improved scheduling method. When it came to implementation of the control law on the aircraft, the lack of processing power necessitated discrete time implementation at a relatively slow rate compared to the bandwidth. To support this, the discrete time solution for the optimal controller in observer form developed in [6] was used. Later research within the CUED Control Group looked at model (in)validation [7] using the Harrier as a vehicle for testing its practicality(.)
Translated title of the contributionReview of Multivariable Control Applied to the VAAC Harrier and Remaining Open Questions
Original languageEnglish
Title of host publicationLecture Notes in Control and Information Sciences (Control of Uncertain Systems: Modelling, Approximation, and Design)
EditorsBruce A. Francis, Malcolm C. Smith, Jan C. Willems
PublisherSpringer
Pages183 - 202
ISBN (Print)3540317546
Publication statusPublished - 2006

Bibliographical note

Other identifier: DOI: 10.1007/11664550_10

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