Modeling and control of lift offset coaxial and tiltrotor rotorcraft

Tom Berger, Ondrej Juhasz, Mark J.S. Lopez, Mark B. Tischler, Joseph Francis Horn

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Scopus citations


The US Department of Defense has established an initiative to develop a family of next-generation vertical lift aircraft that will fly farther, faster, and more efficiently than the current fleet of rotorcraft. To accomplish these goals, advanced rotorcraft configurations beyond the single main rotor/tail rotor design must be considered. Two advanced configurations currently being flight tested are a lift offset coaxial rotorcraft with a pusher propeller and a tiltrotor. The US Army Aviation Development Directorate has developed generic high-fidelity flight-dynamics models of these two configurations to provide the government with independent control-system design, handling-qualities analysis, and simulation research capabilities for these types of aircraft. This paper describes the modeling approach used and provides model trim data, linearized stability and control derivatives, and eigenvalues as a function of airspeed. In addition, control allocation for both configurations is discussed.

Original languageEnglish (US)
Title of host publication44th European Rotorcraft Forum 2018, ERF 2018
PublisherNetherlands Association of Aeronautical Engineers
Number of pages27
ISBN (Electronic)9781510879645
StatePublished - Jan 1 2018
Event44th European Rotorcraft Forum 2018, ERF 2018 - Delft, Netherlands
Duration: Sep 18 2018Sep 21 2018

Publication series

Name44th European Rotorcraft Forum 2018, ERF 2018


Conference44th European Rotorcraft Forum 2018, ERF 2018

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Instrumentation
  • Aerospace Engineering


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