Control of the Aircraft Lateral-directional Motion during Landing Using the H-inf Control and the Dynamic Inversion

In this paper, the phase of aircraft landing associated to the lateral-directional plane is discussed and a new automatic control system is developed; it takes into consideration the crosswind and the sensor errors. H-inf control and the dynamic inversion concept are used because the first mentioned technique handles very well the system uncertainties providing robust stability, while the good precision tracking is assured by the dynamic inversion approach. The new automatic landing system for aircraft control in the lateral plane also includes two reference models and an observer for the estimation of the system state. To test the correctness of the theoretical control system, we software implemented the new designed controller for a light aircraft flight in lateral-directional plane and we analyzed the results as well as the controller robustness with respect to the lateral wind.