The Structural Design and Optimization of a Novel Independently Driven Bionic Ornithopter.

Area of Science:

• Robotics and Mechanical Engineering
• Aerospace Engineering
• Bio-inspired Design

Background:

• Traditional single-motor bionic ornithopters face limitations in environmental adaptability and lift capacity.
• Asymmetric flapping is crucial for enhanced maneuverability in dynamic airflow conditions.

Purpose of the Study:

• To develop and validate a dual-motor independently driven system for bionic ornithopters.
• To enhance environmental adaptability and lift capacity through adjustable flap speed and wing frequency.

Main Methods:

• Implementation of a cross-shaft single-gear crank mechanism for independent dual-motor control.
• Integration of a two-stage reduction gear group for optimized torque transmission.
• Utilization of a high-lift S1223 airfoil for improved aerodynamic efficiency.
• Multiphysics simulations combining computational fluid dynamics (CFD) and finite element analysis (FEA).

Main Results:

• Achieved 50% and 60% improvements in lift and thrust coefficients, respectively, compared to the baseline model.
• Reduced peak stress in critical components by 37% (to 41 MPa) with improved stress uniformity.
• Demonstrated dynamic adaptation to turbulent airflow via precise control of wing kinematics.

Conclusions:

• The dual-motor system significantly enhances bionic ornithopter performance in terms of lift, thrust, and structural integrity.
• The proposed design offers a viable solution for applications requiring high maneuverability and adaptability in complex environments.
• Validated the effectiveness of independent dual-motor control for achieving asymmetric flapping and superior flight characteristics.