Flight-Path Tracking Control of an Aircraft Using Backstepping Controller

Labane Chrif (University of Dr Moulay Tahar, Saida)
Zemalache Meguenni Kada (LDEE Laboratory USTO, MB Oran)
Tahar Mohamed (LDEE Laboratory USTO, MB Oran)

Indonesian Journal of Electrical Engineering and Computer Science
Vol 15, No 2: August 2015

For transportation aircraft, the primary control objective for an autopilot system engaged during approach and landing is relative to the flight path tracking on the basis of highly simplified linear models of flight dynamics. The dynamics governing the flight path of an aircraft are in general highly nonlinear and involve complex physics for which no accurate models are available. In this paper a nonlinear model describing the longitudinal equations of motion in strick feedback form is derived. Backstepping is utilized for the construction of a globally stabilizing controller with a number of free parameters. It is implemented a controller with an internal loop controls involving the pitch rate of the aircraft and an external loop which includes angle of attack, path angle and pitch angle. Finally, nonlinear simulation results for a longitudinal model of a transportation aircraft are displayed and discussed.