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Flight Dynamics and Control of the Butterfly eVTOL Aircraft in Hover

Puneet Singh, Overair Inc.

https://doi.org/10.4050/F-0079-2023-18062

Abstract:
The Butterfly eVTOL aircraft configuration includes four tilting propellers based on Optimum Speed Tilt Rotor technology. The propellers have the ability to operate over a wide range of rotor speeds and therefore generate thrust efficiently in all design flight conditions. Individual blade control actuators are used to provide cyclic inputs and generate hub mast moments. The combined features of variable RPM and mast moment control gives the Butterfly the unique ability to operate with sufficient control margins even with two operational propellers. This paper describes the control methodology to stabilize and operate the aircraft in both the normal and multiple failed propeller conditions. The propeller performance and control response is validated with experiments. The effect of the control methodology and propeller performance on the center of gravity envelope is analyzed. A simple feedback control scheme is applied to demonstrate the efficacy of the control methodology in normal and failure modes.


Flight Dynamics and Control of the Butterfly eVTOL Aircraft in Hover

  • Presented at Forum 79
  • 17 pages
  • SKU # : F-0079-2023-18062
  • Electric VTOL

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Flight Dynamics and Control of the Butterfly eVTOL Aircraft in Hover

Authors / Details:
Puneet Singh, Overair Inc.