MULTIPLE-INPUT M ULTIPLE-OUTPUT LONGITUDINAL ROBUST CONTROL FOR AIRCRAFT

Abstract

This paper is dealt with the design of a multiple-input multiple-output robust controller for the longitudinal flight dynamics of an aircraft control system. The design objective is to achieve robust stability and good dynamic performance against the variation of aircraft parameters in which the aircraft forward speed is considered to be a real uncertainty. The controller synthesis is aimed at maintaining robust performance for frozen values of the aircraft forward speed in a specified operating range. The proposed robust controller is implemented using the robust control toolbox in Matlab. The obtained results verify the performance of the proposed controller for aircraft control system with respect to different values of the aircraft forward speeds.