Numerical and Experimental UAV Structure Investigation by Pre-Flight Load Test.

Area of Science:

• Aerospace Engineering
• Materials Science

Background:

• Structural modifications were made to the HORNET composite unmanned aerial vehicle (UAV).
• Pre-flight verification of structural integrity and operational safety is crucial for modified aerial systems.

Purpose of the Study:

• To present the preparation and execution of on-ground static and engine load tests for the composite UAV.
• To verify the structural strength and operational safety of the modified HORNET aerial target.

Main Methods:

• Numerical evaluation using panel method and Computer Aided Design (CAD) for aerodynamic and inertial forces.
• Multi-stage airframe static test using a modular test rig, artificial masses, and wireless strain measurement.
• Engine ground test stand evaluation for strain, vibration, data link reliability, and wireless control interference.

Main Results:

• The UAV structure was investigated under 150% of the typical load spectrum.
• Strain and vibration levels were verified against engine speed.
• Data link reliability and wireless control interference were assessed.

Conclusions:

• Ground tests confirmed the structural strength and operational safety of the modified composite UAV.
• Numerical and experimental data provided a comprehensive assessment of the UAV's performance under various load conditions.