Stability Based Modeling of Double Dihedral and Double Sweep Wing UAV
by HAVADER Editör Ekibi
Watch a bird's wing closely and you'll notice it's not a single straight line — it changes angle at multiple points, a natural design that boosts both maneuverability and stability. This study tests a similar idea for unmanned aerial vehicles: what difference does it make to angle the wing at two points instead of one?
The longitudinal and lateral stability parameters of fixed-wing UAVs are shaped by changes in wing sweep and dihedral angle. Most literature examines these angles at a single point on the wing; this study's goal was to apply both dihedral and sweep at two different positions on the wing and examine the effect on stability — something no prior study had explored in this form.
The researchers simultaneously analyzed 16 different cases with initial angles of 5° and 15°, determining the damping ratios and natural frequencies of the lateral and longitudinal stability modes. The results revealed that double dihedral (DD) and double sweep (DS) angles have a previously undocumented effect on these parameters.
What this study contributes is opening a new design freedom in UAV wing design, moving past the convention of angling at a single point. An everyday analogy: it's similar to a sailor adjusting a sail at multiple points rather than a single angle, to strike a finer balance against the wind — extra adjustment points allow for more precise control, but also make the design more complex.
In the end, this research shows UAV designers a new way to improve stability by playing with wing geometry — a contribution that could make future designs more robust and predictable, particularly for small UAVs that need to fly in windy or variable weather conditions.
The longitudinal and lateral stability parameters of fixed-wing UAVs are shaped by changes in wing sweep and dihedral angle. Most literature examines these angles at a single point on the wing; this study's goal was to apply both dihedral and sweep at two different positions on the wing and examine the effect on stability — something no prior study had explored in this form.
The researchers simultaneously analyzed 16 different cases with initial angles of 5° and 15°, determining the damping ratios and natural frequencies of the lateral and longitudinal stability modes. The results revealed that double dihedral (DD) and double sweep (DS) angles have a previously undocumented effect on these parameters.
What this study contributes is opening a new design freedom in UAV wing design, moving past the convention of angling at a single point. An everyday analogy: it's similar to a sailor adjusting a sail at multiple points rather than a single angle, to strike a finer balance against the wind — extra adjustment points allow for more precise control, but also make the design more complex.
In the end, this research shows UAV designers a new way to improve stability by playing with wing geometry — a contribution that could make future designs more robust and predictable, particularly for small UAVs that need to fly in windy or variable weather conditions.