Nonlinear and fault-tolerant flight control using multivariate splines

Nonlinear and fault-tolerant flight control using multivariate splines

Tol, H.J.
De Visser, C.C.
Van Kampen, E.J.
Chu, Q.P.

Aerospace Engineering

Control & Operations

2015-04-13

This paper presents a study on fault tolerant flight control of a high performance aircraft using multivariate splines. The controller is implemented by making use of spline model based adaptive nonlinear dynamic inversion (NDI). This method, indicated as SANDI, combines NDI control with nonlinear control allocation based on an onboard aerodynamic spline model and a real-time identification routine. The controller is tested for an aileron hardover failure and structural damages which change the global aerodynamic properties of the aircraft. It is shown that the controller can quickly tune itself in failure conditions without the need of failure detection and monitoring algorithms. Instead, self-tuning innovation based forgetting is applied to reconfigure the onboard aerodynamicmodel. The controller is able to tune itself each time a model error is detected and does not require any external triggers for re-identification. Multivariate splines have a high local approximation power and are able to accuratelymodel nonlinear aerodynamics over the entire flight envelope of an aircraft. As a result the identification routine gives a robust adaption of the aerodynamic model in case of a failure.

http://resolver.tudelft.nl/uuid:43816887-0dfa-4a8e-80dc-40ce5596e07e

3rd CEAS Specialist Conference on Guidance, Navigation and Control, Toulouse, France, 13-15 April 2015; Authors version

https://doi.org/10.1007/978-3-319-17518-8_12

Institutional Repository

conference paper

(c) 2015 The Author(s)