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Integrated Propulsion and Controls for Rotorcraft – Phase 1
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2023-10-01
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[PDF-11.81 MB]
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Edition:Final Report (August 2021 – December 2022)
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Abstract:This technical report documents research conducted by Embry-Riddle Aeronautical University’s Eagle Flight Research Center team in the Integrated Flight and Propulsion Control for Rotorcraft Performance under contract 692M15-19-R-00016. The purpose of the research was to evaluate the performance of various control strategies multi-rotor VTOL aircraft could employ for both nominal and degraded modes of flight. The lessons developed herein are beneficial to Urban and Advanced Air mobility vehicle developers by promoting increased awareness of flight safety through the benefits a collective-cyclic pitch mixed (CCPM) capable rotor system can offer. A large, unmanned quadcopter was built with unique distributed electric propulsion (DEP) units and proved that sustained flight with one rotor disabled is possible. Dynamic simulation models were developed for individual rotor systems and the entire vehicle to predict in-flight behavior of both nominal and motor-out modes of quadrotor, hexarotor, and octorotor flight. Traditional thrust differential-based control logic did not provide adequate control for sustained flight in any failure mode.
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