DESIGN OF AIRCRAFT AUTOSTABILISATION SYSTEMS USING THE INVERSE NYQUIST ARRAY METHOD

Abstract

Rosenbrock's inverse Nyquist array design method for multivariable systems is used to determine controllers for the autostabilisation of a slender delta-winged aircraft. The inverse Nyquist array method is reviewed briefly and is applied to a linear model of an aircraft flying at a Mach number of 0.3, at sea level. The resulting multivariable compensators reduce the interaction between the aileron control and the sideslip angle and between the rudder control and the bank angle such that single-loop compensators can be designed to achieve satisfactory handling qualities at this flight condition.