Modern techniques for active modification of the aircraft dynamic behaviour

In the paper an attempt has been made to show crucial ideas of modification theory. This theory, though just in statu nascendi, provides the flight dynamics engineer with a very valuable design tool, because it covers the diverse topics that have attracted utmost attention in current researches. This paper considers the problem of improving the aircraft dynamic characteristics using feedback control. The starting point is a linear quadratic problem. Next, several applications of control theory to aircraft control law developments are described. The applications include solutions to the artificial stabilization and wing rock control problems. Finally, some issues to be explored are shown.