Practices to identify and preclude adverse Aircraft-and-Rotorcraft-Pilot Couplings – A design perspective. (July 2015)

• Record Type: Journal Article
• Authors: Pavel, Marilena D.; Masarati, Pierangelo; Gennaretti, Massimo; Jump, Michael; Zaichik, Larisa; Dang-Vu, Binh; Lu, Linghai; Yilmaz, Deniz; Quaranta, Giuseppe; Ionita, Achim; Serafini, Jacopo
• Is Part Of: Progress in aerospace sciences. Volume 76(2015:Jul.)
• Page Start: 55
• Page End: 89
• Publication Date: 2015-07
• Subjects: AFCS automatic flight control system -- A/RPCs Aircraft-and-Rotorcraft-Pilot Couplings -- BA/BT/BAT boundary avoidance/boundary tracking/boundary avoidance tracking -- BDI/BDFT biodynamic interaction/biodynamic feedthrough -- DOF degree of freedom -- FBW fly-by-wire -- FCS flight control system -- HQs handling qualities -- LTI linear time invariant -- MTE mission task element -- OLOP open loop onset point -- PAC phase aggression criterion -- PRE–PAC prediction algorithm–phase aggression criterion -- PIO/PAO pilot induced oscillations/pilot assisted oscillations -- PIOR PIO rating -- PVS pilot-vehicle system -- RLEs/PLEs rate limiting element/position limiting element -- ROVER real-time oscillation verifier -- RMS root mean square -- RSA robust stability analysis -- SAS/SCAS stability augmentation system/stability and control augmentation system -- TCL thrust control lever; Aircraft-Pilot Couplings (APC) -- Rotorcraft-Pilot Coupling (RPC) -- Conceptual design -- Preliminary design -- Flight control system design -- Pilot induced oscillations (PIO) -- Pilot assisted oscillations (PAO) -- Automatic flight control system (AFCS); Aeronautics -- Periodicals; Astronautics -- Periodicals; Aéronautique -- Périodiques; Astronautique -- Périodiques; 629.1
• DOI: 10.1016/j.paerosci.2015.05.002
• Languages: English
• ISSNs: 0376-0421

Abstract

Abstract: Understanding, predicting and supressing the inadvertent aircraft oscillations caused by Aircraft/Rotorcraft Pilot Couplings (A/RPC) is a challenging problem for designers. These are potential instabilities that arise from the effort of controlling aircraft with high response actuation systems. The present paper reviews, updates and discusses desirable practices to be used during the design process for unmasking A/RPC phenomena. These practices are stemming from the European Commission project ARISTOTEL Aircraft and Rotorcraft Pilot Couplings – Tools and Techniques for Alleviation and Detection (2010–2013) and are mainly related to aerodynamic and structural modelling of the aircraft/rotorcraft, pilot modelling and A/RPC prediction criteria. The paper proposes new methodologies for precluding adverse A/RPCs events taking into account the aeroelasticity of the structure and pilot biodynamic interaction. It is demonstrated that high-frequency accelerations due to structural elasticity cause negative effects on pilot control, since they lead to involuntary body and limb-manipulator system displacements and interfere with pilot's deliberate control activity (biodynamic interaction) and, finally, worsen handling quality ratings.