Mohammad Reza Behjameh - Department of Electrical and Electronic Engineering Malek Ashtar University of Technology Tehran, Iran
hadi Delavari - Department of Electrical and Electronic Engineering Hamedan University of Technology Hamedan, Iran

In this article an optimal robust control approachfor a multi-input multi-output aircraft system is presented.Some more introductions about the fundamental aspects of theLQG/LTR control theory are addressed, and it shows anapplication option through simulation in MATLAB. Themovement of an aircraft can be modeled with a linear timeinvariant dynamic system, which must be controlled by a flightcontroller. This method is used to reject interactions betweenstates of aircraft and minimize error magnitude. This articlecontains the synthesis and analysis of the stability and otherqualitative control parameters of the flight control using anoptimal robust controller. The performance of the controller isevaluated in simulations and show that the proposed controllerrejects persistent disturbances, which is quantized by a verysmall magnitude of the mean error.

Robust control; optimal control; LQG/LTR controller; uncertainty; DNA controller; aircaf systemt