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Nonlinear Observer for Estimating Gravity Vector and Flight Path Angles of a High-Performance Aircraft
ISSN: 1946-3855, e-ISSN: 1946-3901
Published August 14, 2023 by SAE International in United States
Citation: Chandrasekaran, K. and Jain, S., "Nonlinear Observer for Estimating Gravity Vector and Flight Path Angles of a High-Performance Aircraft," SAE Int. J. Aerosp. 17(1):2024, https://doi.org/10.4271/01-17-01-0007.
This paper proposes a nonlinear observer for the estimation of gravity vector and angles with respect to velocity vector (flight path angle, bank angle) of a high-performance aircraft. The technique is computationally simpler than the extended Kalman filter (EKF) and hence is suitable for onboard implementations when the digital flight control computer (DFCC) has computational burdens. Flight test data of a highly maneuvering flight such as wind-up turns and full rolls have been used to validate the technique.