An Uncertainty Propagation Approach to Collective Bounce Rotorcraft-Pilot Couplings Analysis

Andrea Zanoni; Gianni Cassoni; Carmen Talamo; Davide Marchesoli; Pierangelo Masarati; Michele Zilletti; Francesca Colombo

doi:10.4050/F-0080-2024-1321

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An Uncertainty Propagation Approach to Collective Bounce Rotorcraft-Pilot Couplings Analysis

Andrea Zanoni, Gianni Cassoni, Carmen Talamo, Davide Marchesoli, Pierangelo Masarati, Politecnico di Milano

Michele Zilletti, Francesca Colombo, Leonardo Helicopters

May 7, 2024

https://doi.org/10.4050/F-0080-2024-1321

Abstract:
In the context of Rotorcraft Pilot Couplings, the biomechanics of the pilot body play a fundamental role in determining the stability of the pilot-vehicle closed loop system. The response of the pilot body is, in turn, inherently stochastic, being a function of pilot biometrics and muscular activation. Coupling the statistical distribution of pilot biomechanical behavior determined in specialized experimental campaign with linear models of the helicopter heave dynamics, an uncertainty propagation procedure is developed, with the aim of estimating the statistical distribution of the stability margins of the closed loop pilot-vehicle system. Results obtained varying the collective lever characteristics, as well as the helicopter model parameters, align well with results obtained previously in deterministic settings. However, the new scheme allows to define quantitative robustness indices.