Drag Minimization of an Active Flexible Wing with Multiple Control Surfaces
(English)Article in journal (Other academic) Submitted
In this study, the performance of a highly flexible wing with multiplecontrol surfaces is optimized for different flight conditions. A windtunnel model with 20 independent control surfaces is used as the testobject. The problem is posed as a nonlinear optimization problem withthe measured drag as the objective. Constraints include keeping the liftconstant, as well as having bounds on the control surface deflections. Nocomputational estimation of the drag is performed. Instead, experimentalmeasurements of the drag are used to perform the optimization in realtime using a generating set search method (GSS). The algorithm makesthe wing adapt to the current flight condition to improve performanceand the experimental evaluation of the method shows that the drag issignificantly reduced within a wide range of flight conditions. A study onthe number of control surfaces needed is also included, and the resultsshow that, if chosen properly, only three control surfaces distributed overthe wing are needed to reduce drag significantly.
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-7269OAI: oai:DiVA.org:kth-7269DiVA: diva2:12228
QS 201203272007-06-012007-06-012012-03-27Bibliographically approved