Abdominal Movements in Insect Flight Reshape the Role of Non-Aerodynamic Structures for Flight Maneuverability I:...

Area of Science:

• Biomechanics
• Insect flight dynamics
• Robotics

Background:

• Insect flight control research traditionally emphasizes wing function.
• Abdominal deformations are recognized as potential contributors to flight dynamics and maneuverability.
• Understanding these non-wing contributions can advance bio-inspired aerial vehicle design.

Purpose of the Study:

• To investigate the role of airframe deformations, specifically abdominal deflections, in insect flight control.
• To quantify the contribution of the abdomen to flight maneuverability in the hawkmoth (Manduca sexta).
• To compare the performance of fully actuated versus underactuated flight control systems.

Main Methods:

• Utilized a Model Predictive Control (MPC)-inspired computational inertial dynamics model.
• Conducted free flight experiments on live hawkmoths (Manduca sexta).
• Assessed flight performance using metrics like non-dimensionalized tracking error and cost of transport.

Main Results:

• Fully actuated simulations demonstrated minimized tracking error and cost of transport.
• Hawkmoths with experimentally restricted abdominal movement exhibited impaired flight performance compared to controls.
• Abdominal motions were confirmed to be crucial for effective flight control and maneuverability.

Conclusions:

• Abdominal deflections play a significant role in insect flight control and maneuverability.
• The findings support the integration of non-aerodynamic structure movements for enhanced control in micro air vehicles.
• This research provides insights applicable to the design of multi-actuated aerial robots inspired by insect flight.