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This paper describes the application of an indirect linear fractional transformation (LFT)–based state‐space adaptive control scheme to a transport aircraft, within the context of the European project REconfiguration of CONtrol in Flight for Integral Global Upset REcovery. The principle of the scheme is to design and validate off‐line a gain‐scheduled controller, depending on the plant parameters...
On-line parameter tracking is often an attractive option for advanced FDD/FTC systems that require a global monitoring in contrast with a local (component) one. This is the case for impaired aircraft, but also for under-equipped vehicles (UAVs, small airplanes), since an updated model is a prerequisite for many indirect adaptive or reconfigurable control algorithms. Many schemes have been proposed...
An adaptive gain-scheduled flight control law is designed for a transport aircraft, within the context of the European project RECONFIGURE. A primary concern being on-line implementation, a recursive frequency domain estimator of the linearized aerodynamic model is developed, with a low on-line computational burden and the capability to track time-varying parameters. Next, an LFT flight controller...
Introduction of fly-by-wire and increasing levels of automation significantly improve the safety of civil aircraft, and result in advanced capabilities for detecting, protecting and optimizing A/C guidance and control. However, this higher complexity requires the availability of some key flight parameters to be extended. Hence, the monitoring and consolidation of those signals is a significant issue,...
The works presented in this paper are a part of research studies which aim at evaluating new concepts for the control and guidance of future A/C, focusing on the augmentation of control laws' availability. The main purpose is to improve the monitoring and the consolidation of the key parameters used by these latter and by the flight envelope protections. Model-based FDD techniques, that make a global...
Introduction of Fly-By-Wire and increasing levels of automation improve the safety of civil aircraft significantly, and result in advanced capabilities for detecting, protecting and optimizing A/C guidance and control. However, this higher complexity requires the availability of some key flight parameters to be extended, to keep for a nominal behaviour of the flight control systems. Hence, the monitoring...
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