Guibert, Vincent (ENAC (French Civil Aviation University)), Condomines, Jean-Philippe (ENAC), Brunot, Mathieu (ONERA), BIANNIC, Jean-Marc (ONERA), Bronz, Murat (ENAC)

A Hybrid Polynomial Stall Model for the Longitudinal Dynamics of a UAV

Scheduled for presentation during the Regular Session "Reliability of UAS" (ThA3), Thursday, June 23, 2022, 11:30−11:50, Divona-1

2022 International Conference on Unmanned Aircraft Systems (ICUAS), June 21-24, 2022, Dubrovnik, Croatia

This information is tentative and subject to change. Compiled on April 18, 2024

Abstract

Modeling the longitudinal dynamics of a fixed-wing unmanned aerial vehicle (UAV) at high angles of attack is not an easy task. Indeed, when the airplane approaches stall, non-linear effects appear, including transient behaviors and an aerodynamic hysteresis. Although some models are present in the literature to address these aspects, they are usually aerodynamics-based and often too complex for analysis and control applications. Therefore, this paper presents a new hybrid polynomial formulation for the modeling of the aerodynamic coefficients. In addition, a Linearly Constrained Least Squares (LCLS) process guaranteeing continuity at the mode transitions is proposed for the identification of the model. The Hybrid Polynomial Stall Model (HPSM) is finally identified on experimental wind tunnel data, showcasing its ability to accurately predict a UAV's dynamics.