Design of analog and digital aircraft flight controllers based on dynamic contraction method

Abstract

In the paper the feasibility of the Dynamic Contraction Method for the design of the aircraft motion analog and digital controllers is studied. The control task is formulated as a tracing problem for Euler angles, where decoupled output transients are accomplished in spite of incomplete information about varying parameters of the system and external disturbances. A resulting output feedback continuous-time controller has a simple form of a combination of three low-order linear dynamical systems and a matrix whose entries depend nonlinearly on certain known process variables. The resulting continuous-time controller is then digitally redesigned. The pseudo - continuous - time model of a control loop with a pure time delay is used to calculate parameters of a digital controller.