Analysis and Testing of a Flyable Micro Flapping-Wing Rotor with a Highly Efficient Elastic Mechanism

Area of Science:

• Bio-inspired robotics and micro aerial vehicles.
• Aerodynamics and flight dynamics.
• Mechanical engineering and system design.

Background:

• Flapping-Wing Rotors (FWRs) are novel bio-inspired micro aerial vehicles.
• Achieving high power efficiency is crucial for FWR development.
• Existing FWR designs face challenges in optimizing lift and energy consumption.

Purpose of the Study:

• To investigate the use of an elastic flapping mechanism to enhance FWR power efficiency.
• To analyze the impact of spring stiffness on aerodynamic performance and power consumption.
• To develop and validate a dynamic model for elastic flapping mechanisms in FWRs.

Main Methods:

• Development of a dynamic model simulating FWR wing kinematics and elastic mechanism.
• Inclusion of coupled aerodynamic, inertial, elastic, and driven forces in the model.
• Experimental verification of the dynamic model and investigation of spring stiffness effects.

Main Results:

• Incorporating an elastic flapping mechanism increased power efficiency by 16% at near-resonance stiffness.
• The optimized elastic mechanism achieved greater lift and lower power consumption.
• A 27.79 g FWR prototype with onboard power successfully demonstrated vertical take-off flight.

Conclusions:

• Elastic flapping mechanisms significantly improve power efficiency in Flapping-Wing Rotors.
• The developed dynamic model accurately predicts FWR performance with elastic components.
• This research paves the way for more efficient and capable bio-inspired micro aerial vehicles.