Abstract. In this work an alternative beam finite element for rapid time-domain flutter analysis of wings equipped with trailing edge control surfaces, generally distributed along the span, is presented. The aeroelastic proposed based on Euler-Bernoulli theory, De St. Venant torsion theory and two-dimensional unsteady aerodynamics. developed model attractive preliminary aero-servo-elastic analy...

This paper focuses on the dynamic effects of flexible propellers F2 class aircraft models. An oscillating propeller affects an engine’s mechanical performance, and this combination has a huge influence model’s flight performance. In first second sections paper, two physical tests that were performed according to test results obtained using CFX numerical model are discussed. The studies for mode...

Surface pressure data from the National Renewable Energy Laboratory’s “Unsteady Aerodynamics Experiment” were analyzed to characterize the impact of threedimensionality, unsteadiness, and flow separation effects observed to occur on downwind horizontal axis wind turbines (HAWT). Surface pressure and strain gage data were collected from two rectangular planform blades with S809 airfoil crosssect...

When a plane crosses the wake generated by a preceding aircraft, large dynamical loads in the order of the design loads may be induced. Loads analysis models for such wake vortex encounters need to consider aspects important for manoeuvre, as well as gust type responses. If the angle between the path and the trailing vortices is small, the encounter is manoeuvre like due to large induced roll m...

This paper deploys a recently proposed, biologically inspired, on-line, search-based optimization technique called Selective Evolutionary Generation Systems (SEGS) for control purposes; here, to evolve Micro Air Vehicle (MAV) flapping wing gaits in changing flight conditions to maintain hovering flight and track trajectories in unsteady airflow. The SEGS technique has several advantages, includ...

HIGH altitude, long endurance (HALE) aircraft offer capabilities found nowhere else in the spectrum of machine flight, but their design and analysis offers unique challenges. From their observation altitude above 50,000 ft, HALE systems can relay telecommunication signals, perform intelligence, surveillance, and reconnaissance (ISR) functions covering large swaths of land for extended periods o...

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