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Control Law Design and Handling Qualities for a Coaxial Rotorcraft

Barzin Hosseini, Juergen Rauleder, Michael Bachfischer, Florian Holzapfel, Georgia Institute of Technology Derek Bridges, Grey Hagwood, Doug Miller, Piasecki Aircraft Corporation

https://doi.org/10.4050/F-0081-2025-0403

Abstract:
A robust velocity stability augmentation system was developed for the CoAX 600/2D coaxial-rotor helicopter to enable safe testing of a fly-by-wire system on an optionally piloted variant of the aircraft, developed by Piasecki Aircraft Corporation. The control law design and subsequent stability analysis were based on a validated nonlinear model of the CoAX 600 rotorcraft. A subset of helicopter handling qualities were evaluated through both analytical methods and piloted simulations, conducted with and without the stability augmentation system. Additionally, flight test data contributed to the analysis, albeit to a limited extent.


Control Law Design and Handling Qualities for a Coaxial Rotorcraft

  • Presented at Forum 81
  • 12 pages
  • SKU # : F-0081-2025-0403
    • Handling Qualities

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Control Law Design and Handling Qualities for a Coaxial Rotorcraft

Authors / Details: Barzin Hosseini, Juergen Rauleder, Michael Bachfischer, Florian Holzapfel, Georgia Institute of Technology Derek Bridges, Grey Hagwood, Doug Miller, Piasecki Aircraft Corporation