Investigation on flight load calibration of aircraft composite wing base on strain gauge measurement

Abstract

A computational and test method for calibrating the flight loads carried by aircraft wings is proposed. The wing load is measured in real-time based on the resistance and fiber Bragg grating strain gauges. The linear stepwise regression method is used to construct the load equations. The mean impact value algorithm is employed to select suitable bridges. In the ground calibration experiment, the wing load calculation equations in both forward and reverse installation states are calibrated. The correctness of the load equations was verified through equation error and inspection error analysis. Finally, the actual flight load of the wing was obtained through flight tests.

Keywords

• Aircraft wing load
• Linear stepwise regression method
• Strain measurement
• MIV algorithm
• Load equation