27th Congress of International Council of the Aeronautical Sciences, 19 - 24 September 2010, Nice, France
Paper ICAS 2010-5.3.1

MATHEMATICAL STUDY OF LINEAR AND NONLINEAR ROTORCRAFT PILOT-INDUCED OSCILLATIONS

S. Kolb, M. Menet*
French Air Force Research Centre, France; *French Air Force Academy, France

Keywords: pilot-induced oscillations, rotorcraft

Several mathematical criteria allows to analyse the pilot-induced oscillation proneness of rotorcraft flight control systems and to design them adequately. The linear behaviour is evaluated by means of bandwidth/phase delay and Neal-Smith criteria. Nonlinear events (rate limiting) are examined thanks to the describing function method and the OLOP criterion.

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