Robotic bird helps uncover the mysteries of flight turbulence
A live kestrel and it’s robotic counterpart. A bio-inspired robotic bird capable of mimicking the key movements of kestrels is helping researchers unravel the mysteries behind the species’ exceptional hovering capabilities. With atmospheric turbulence expected to worsen due to climate change, understanding how birds naturally cope with rough air could help engineers design small unmanned aerial vehicles (sUAVs) that are safer, more efficient and fly more smoothly. sUAVs are commonly used for applications including aerial photography, search and rescue, agricultural monitoring and package delivery but are often grounded in turbulent conditions. The research, published across two papers in the Journal of the Royal Society Interface, is part of a multi-year collaboration between RMIT University and the University of Bristol, and has delivered significant outcomes in the field of bio-inspired flight and turbulence mitigation. Learning from the best Among the most stable fliers in the avian world is the nankeen kestrel, whose movements in gusty and turbulent conditions were tracked by researchers using motion capture technology in RMIT’s Industrial Wind Tunnel facility – one of the largest of its kind in Australia. RMIT researcher Matt Penn, who led part of the research into how birds handle turbulence, said birds have a range of strategies for enduring rough air, allowing them to fly in complex conditions that would typically ground sUAVs. “Birds don’t rely on a single response to wind gusts,” he said. “They constantly adjust their wings and tails to stay balanced, while the natural flexibility of their feathers and joints helps absorb sudden changes in airflow. They can also sense disruptions very quickly, which allows them to respond almost instantly and maintain control.” The robotic replica A robotic replica capable of imitating the movements most crucial to kestrels’ remarkably stable flight, has enabled further investigation into the subtle wing and body […]