Ground Strength Test Technique of Variable-Camber Wing Leading Edge

Area of Science:

• Aerospace Engineering
• Mechanical Engineering
• Materials Science

Background:

• Morphing wing technology is vital for improving aircraft flight performance.
• Monitoring full-scale variable-camber leading edges under flight conditions presents significant challenges.
• Accurate evaluation of deformation and structural strength is essential for operational integrity.

Purpose of the Study:

• To introduce and validate a novel ground-based strength testing technique for variable-camber leading edges.
• To precisely evaluate deformation patterns and structural strength during simulated actual operation.
• To provide scientific evidence and technical support for testing and evaluating morphing wing components.

Main Methods:

• Kinematic theory-based numerical simulation to analyze motion characteristics.
• Design and construction of a tracking loading test rig for simulating deformation and aerodynamic loads.
• Multi-point coordinated control system and multi-sensor iterative method for accurate experimental control and loading precision.

Main Results:

• The developed technique achieved an average deflection angle error of 4.59% in motion tests.
• Strength tests showed average errors of 0.54% in load magnitude and 0.24% in load direction.
• The method accurately simulates flight conditions, capturing leading edge shape, deformation, and strain curves.

Conclusions:

• The proposed ground-based strength testing technique effectively simulates flight conditions for deforming wings.
• The technique provides accurate data on leading edge shape changes and structural responses.
• This study offers a reliable method for testing and evaluating variable-camber leading edges, supporting future aerospace advancements.