Implementation of Variable RPM in Helicopter Flight Control Laws
A power command control system in the vertical axis was designed to incorporate variable rotor speed. The controller is open-loop, making it an inexpensive and reliable solution. A rotor speed optimization analysis defines a fixed non-linear mapping to find the combination of collective pitch and rotor speed based on the power command to optimize performance in level flight, climbing/descending flight, and steady turns. The optimal rotor speed schedule can take into account performance limits associated with the vertical axis such as power limits, torque limits, yaw control margins, and maximum rate of descent. A model following controller is implemented for the pitch, roll, and yaw axes. Rotor state feedback (RSF) control was used to address rotor-body coupling phenomena observed in previous simulation studies. The control system was demonstrated using the GENHEL simulation of a UH-60A helicopter. Piloted simulation was performed to confirm the benefits of using variable rotor speed on fuel efficiency.
Joseph F. Horn Wei Guo Gurbuz Taha Ozdemir
Department of Aerospace Engineering The Pennsylvania State University University Park, PA
国际会议
南京
英文
1-11
2009-10-14（万方平台首次上网日期，不代表论文的发表时间）