Applications of H-infinity loop shaping design procedure in UAV Flight Control Systems

Document Type : Original Article

Authors

1 Karary University, Khartoum, Sudan.

2 Military Technical College, Cairo, Egypt.

3 Science Valley Academy, Cairo, Egypt.

Abstract

Abstract:
The UAV flight control system is rich with attractive and challenging design problems
to achieve robust stability and acceptable performance across specified flight envelope
in the presence of uncertainties. Therefore, this paper is devoted to design an adequate
flight control system for stabilizing a fixed wing (Aerosonde) UAV under exogenous
inputs. This UAV is modeled and it is utilized with the   loop-shaping design
procedure (LSDP) to design the necessary flight control system such that the
performance requirements are achieved. This work is compared with a previous one
using the classical controllers in terms of performance and stability robustness including
disturbance rejection, noise attenuation, unmodeled dynamics, and control effort. The
obtained results clarify the ability of the designed system using  H to cope with the
specified levels of uncertainty including unmodeled dynamics, disturbances and
measurement noise. In addition, it reveals its superior capabilities upon the classical
techniques.

Keywords