Marcel Thevagt presented latest research results at the WCCM-ECCOMAS 2026 in Munich. The paper, titled “Pretension Control Architecture for Raised Krueger Flaps on Laminar Airfoils”, investigates the model-based development of a control system for applying pretension to the kinematics of raised Krueger flaps.
Krueger flaps are high-lift devices used during take-off and landing and retracted during cruise. For laminar airfoils, they protect the wing leading edge from contamination when deployed while enabling a seamless upper surface when retracted. These characteristics are essential for maintaining laminar airflow and reducing aerodynamic drag during cruise.
A virtual test environment was developed using a coupled co-simulation approach with MATLAB Simulink/Simscape and MSC Software Adams. The environment models the drive system, kinematics, and Krueger flap while addressing the challenge of unintended flap movement in the retracted position caused by aerodynamic suction forces.
The proposed control system combines position control for normal operation with torque control for pretensioning the kinematics. Simulation results demonstrate the ability to achieve the required preload and maintain a locked retracted position. Additionally, a simulation-based failure study confirmed reliable detection of the investigated failure scenarios.
The presentation was part of the Special Technology Sessions at WCCM-ECCOMAS 2026 and provided an opportunity for valuable discussions and exchange with researchers from the international community. The full paper will be published soon.
