Publications

Version: 1.0 Approved

LDO-ID 2022PUB00060

Title "High-Fidelity Modelling of Actuation Systems for Nonlinear Aeroservoelastic Analysis of Tiltrotor"

Abstract

Recent evolutions in regulatory practices place an increasing emphasis on nonlinear aeroservoelastic analysis to prevent adverse phenomena like Limit Cycle Oscillations (LCO). Due to enhanced computational capabilities, this field is set to take an even more important role in the certification process of new aircraft, and in particular of tiltrotor, together exploiting the increasing ability to build multidisciplinary and high-fidelity modelling of complex aeronautical systems. In this paper, a comprehensive model of a tiltrotor control surface actuation system is introduced, capable of accurately representing the main nonlinear features and helping to shed light on their origin. The model includes the entire control chain, starting from the Flight Control System (FCS) logic and getting to the control surface structure, passing through the hydraulic servo-actuator and the related mechanical linkages. The model is tested, when possible, at the subsystem level, and is compared to experimental data gathered on the actual control surface. Finally, a simplified nonlinear aeroservoelastic simulation shows the potential effects of the nonlinearities present in the system.

Authors Quaranta, Giuseppe; Trezzini, Alberto Angelo; Pellegrino, Federico

Type Paper for Seminar/Symposium/Conference

Media Vertical Flight Society - Annual Forum & Technology Display (10-12 May 2022, Fort Worth, TX, USA)

Web site

https://vtol.org/annual-forum/forum-78-proceedings?paperSort=techSession#Dynamics%20I

Anno 2022