Active flutter suppression: non-structured and structured H∞ design

Sergio Waitman Filho, Andres Marcos

Research output: Contribution to journalArticle (Academic Journal)peer-review

7 Citations (Scopus)
77 Downloads (Pure)


In this article a comparison of two controllers for the active suppression of flutter of a flexible remotely-piloted aerial vehicle is presented. The H∞ technique is used for both, but the first relies on the standard (non-structured) approach and the second on the structured synthesis. High-fidelity models derived from finite element modeling are used to verify the performance of the obtained controllers. Reduced-order models are used for the control synthesis, which are obtained from applying a combination of balanced and modal reduction techniques on the high-fidelity models. The results show that both controllers are similar in performance and robustness, and both are capable of suppressing flutter and extending the flight envelope well beyond the open-loop flutter speed.
Original languageEnglish
Pages (from-to)146-151
Number of pages6
Issue number12
Publication statusPublished - 25 Nov 2019
Event21st IFAC Symposium on Automatic Control in Aerospace -
Duration: 27 Aug 201929 Aug 2019


  • Aerospace
  • aircraft control
  • H∞ control
  • robust control


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