Nonlinear Flight Control Using Forebody Tangential Blowing

摘要

Forebody Tangential Blowing (FTB) is a pneumatic device that modifies the vortical flow over the forebody of an aircraft operating at high angles of attack. Modified vortical flow in turn creates roll and yaw moments for control. Consequently, it provides a mechanism that could greatly expand the flight envelope of future aircraft systems. One major factor that currently limits the use of FTB as a control effector is that it produces highly nonlinear and uncertain forces. In this work we develop a technique that will yield for the first time robust control at small levels of blowing thus enabling a new level of efficiency in the use of FTB as a device for flight control at high angles of attack.