Optimizing control of a compound rotorcraft in quasi-steady maneuvers

Adam T. Thorsen, Joseph F. Horn, Gurbuz T. Ozdemir

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

6 Scopus citations

Abstract

This study investigates control allocation for a compound rotorcraft to optimize performance in acceleration, pull-up, and turning maneuvers. Simulations of a hypothetical compound rotorcraft based on a UH-60A airframe and main rotor with a wing and pusher propeller are used. The study presents general background on the simulated compound rotorcraft's performance in trim and the trim methodology employed. In addition to the four traditional controls, this study explores two additional control effectors: propeller pitch and symmetric wing flap deflection, which can be optimized for performance in trim or maneuvering flight. Trim analysis of quasi-steady maneuvers is used to gain an understanding of the control allocation that minimizes power required. The results of the optimization are incorporated into a g-command model inversion controller to regulate longitudinal and vertical load factor. A combined longitudinal and vertical load factor command controller is used to ensure optimal control allocation with regards to the propulsive force distribution between the main rotor and propeller, and the lift force distribution between the main rotor and wing.

Original languageEnglish (US)
Title of host publicationAmerican Helicopter Society International - 5th Decennial AHS Aeromechanics Specialists' Conference 2014
Subtitle of host publicationCurrent Challenges and Future Directions in Rotorcraft Aeromechanics
PublisherAmerican Helicopter Society International
Pages434-449
Number of pages16
ISBN (Electronic)9781634391788
StatePublished - 2014
Event5th Decennial AHS Aeromechanics Specialists' Conference 2014: Current Challenges and Future Directions in Rotorcraft Aeromechanics - San Francisco, United States
Duration: Jan 22 2014Jan 24 2014

Publication series

NameAmerican Helicopter Society International - 5th Decennial AHS Aeromechanics Specialists' Conference 2014: Current Challenges and Future Directions in Rotorcraft Aeromechanics

Other

Other5th Decennial AHS Aeromechanics Specialists' Conference 2014: Current Challenges and Future Directions in Rotorcraft Aeromechanics
CountryUnited States
CitySan Francisco
Period1/22/141/24/14

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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  • Cite this

    Thorsen, A. T., Horn, J. F., & Ozdemir, G. T. (2014). Optimizing control of a compound rotorcraft in quasi-steady maneuvers. In American Helicopter Society International - 5th Decennial AHS Aeromechanics Specialists' Conference 2014: Current Challenges and Future Directions in Rotorcraft Aeromechanics (pp. 434-449). (American Helicopter Society International - 5th Decennial AHS Aeromechanics Specialists' Conference 2014: Current Challenges and Future Directions in Rotorcraft Aeromechanics). American Helicopter Society International.