Tuning and testing of a minimax tracking controller for aircraft dynamics

The paper presents the tuning and testing of an LQ optimal minimax tracking controller which is capable of attenuating low frequency deterministic, and all frequency stochastic disturbances. The controller based on a multiple step solution is developed for discrete time, LTI systems affected by the above mentioned disturbances. Its capabilities are demonstrated in an unmanned aircraft application example. The tracking and disturbance rejection properties are compared with a previous baseline control solution in simulations with linear and nonlinear aircraft models. The advantages of the proposed scheme are highlighted against the baseline design.