Robust-adaptive magnetic bearing control of flexible matrix composite rotorcraft driveline

Hans A. DeSmidt, K. W. Wang, Edward Smith

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Recent studies demonstrate that a key advantage of flexible matrix composite (FMC) shaft technology is the ability to accommodate misalignments without need for segmenting or flexible couplings as required by conventional alloy and graphite/epoxy composite shafts. While this is indeed a very promising technology for rotorcraft driveshafts, the high-damping loss-factor, and thermal stiffness and damping sensitivities of the urethane matrix, makes FMC shafting more prone to self-heating and whirl instabilities. Furthermore, the relatively low-bending stiffness and critical speeds of FMC shafts make imbalance vibration a significant challenge to supercritical operation. To address these issues and advance the state of the art, this research explores active magnetic bearing (AMB) technology together with a robust-adaptive hybrid H∞ feedback/synchronous adaptive vibration control law designed to ensure stable supercritical operation of a prototype FMC rotorcraft driveline. The effectiveness of the proposed new approach is demonstrated through analysis of a helicopter driveline testbed.

Original languageEnglish (US)
Pages (from-to)115-124
Number of pages10
JournalJournal of the American Helicopter Society
Volume53
Issue number2
DOIs
StatePublished - Apr 1 2008

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Magnetic bearings
Composite materials
Damping
Stiffness
Flexible couplings
Graphite epoxy composites
Urethane
Vibration control
Testbeds
Helicopters
Feedback
Heating

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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Robust-adaptive magnetic bearing control of flexible matrix composite rotorcraft driveline. / DeSmidt, Hans A.; Wang, K. W.; Smith, Edward.

In: Journal of the American Helicopter Society, Vol. 53, No. 2, 01.04.2008, p. 115-124.

Research output: Contribution to journalArticle

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