Dynamische Modellierung und Regelung des Auftriebs von realen Hochauftriebskonfigurationen mittels Strömungsbeeinflussung auf der Klappe

Active flow control by means of blowing valves is an established method to beneficially influence air flows. Based on numerous investigations of the effect of blowing at trailing edge flaps, investigations of flight-relevant configurations become more interesting. The aim of these is to improve the lift in certain flight situations, with the vision of a lighter and less maintenance-intensive wing. This work investigates the closed-loop control of lift at these configurations. This could help maintaining a desired level of lift or even set an -- within physical boundaries -- arbitrary level of lift. Three experiments with rising complexity are reported here: Beginning with a wind-tunnel model with roughly two-dimensional flow and a single-slotted flap, followed by a model of a real wing with single-slotted flap and eventually a test-plane, the dynamics of separation and reattachment were investigated and it is shown how this affects control concepts. The models to describe these processes are of low order and higher order models did not yield any benefits control-wise. The usability of linear robust controllers is demonstrated and topics of sensors and choice of control variables are discussed. An adaptive control algorithm based on an ARMA-model with Markov-parameters, will be tried and evaluated in a flight test. Finally, based on an analysis of the experiments outlined above, an easy-to-implement controller synthesis algorithm will be given and tested. This will enable users with only little knowledge in the field of control theory to synthesise a working controller.