The aim of the paper is the assessment of a methodology for the identification of a helicopter rotor aeroelastic operator in state-space form relating airframe motion and blade controls perturbations to corresponding hub loads, as extracted from a high-fidelity rotor aeroelastic solver. It is suited for helicopter flight dynamics stability and real-time commands response analyses, as well as for control laws synthesis.The identification method consists of a three-step process, starting with evaluation of responses to small perturbation harmonic inputs, followed by their spectral analysis and rational form approximation of corresponding transfer functions. Considering a Bo-105-type helicopter, numerical investigation is focused on: analysis of critical parameters affecting accuracy and efficiency of transfer functions identification, interpretation of the additional states introduced by rational approximation, validation of rotor finite-state aeroelastic representation.

Gori, R., Serafini, J., Molica Colella, M., Gennaretti, M. (2016). Assessment of a state-space aeroelastic rotor model for rotorcraft flight dynamics. CEAS AERONAUTICAL JOURNAL, 7(3), 405-418 [10.1007/s13272-016-0196-1].

Assessment of a state-space aeroelastic rotor model for rotorcraft flight dynamics

GORI, RICCARDO;SERAFINI, JACOPO;GENNARETTI, MASSIMO
2016-01-01

Abstract

The aim of the paper is the assessment of a methodology for the identification of a helicopter rotor aeroelastic operator in state-space form relating airframe motion and blade controls perturbations to corresponding hub loads, as extracted from a high-fidelity rotor aeroelastic solver. It is suited for helicopter flight dynamics stability and real-time commands response analyses, as well as for control laws synthesis.The identification method consists of a three-step process, starting with evaluation of responses to small perturbation harmonic inputs, followed by their spectral analysis and rational form approximation of corresponding transfer functions. Considering a Bo-105-type helicopter, numerical investigation is focused on: analysis of critical parameters affecting accuracy and efficiency of transfer functions identification, interpretation of the additional states introduced by rational approximation, validation of rotor finite-state aeroelastic representation.
2016
Gori, R., Serafini, J., Molica Colella, M., Gennaretti, M. (2016). Assessment of a state-space aeroelastic rotor model for rotorcraft flight dynamics. CEAS AERONAUTICAL JOURNAL, 7(3), 405-418 [10.1007/s13272-016-0196-1].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/306058
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