A real-time monitoring method of wing bending moment based on fiber grating measured strain

Abstract

The invention provides a real-time monitoring method of the wing bending moment based on the fiber grating actual measurement strain. The method comprises following steps of 1, adhering a fiber grating sensor on a wing; 2, acquiring strain actually measured by the fiber grating sensor; 3, analyzing states of the wing bending moment; and 4, calculating the wing bending moment. In this way, by use of the strain data actually measured by the fiber grating on the wing, the bending moment of the wing is calculated, so an effect that the bending moment of the wing can be acquired only by use of the strain data actually measured by the fiber grating without other information like wing load and the wing structure; and an actual problem is solved that the bending moment is monitored in real time only based on the strain data actually measured by the fiber grating.

Description

Technical field: [0001] The invention provides a real-time monitoring method for wing bending moment based on the measured strain of fiber grating, specifically relates to using the measured strain measured by fiber grating to obtain the bending moment of the wing to realize real-time monitoring of the wing bending moment, which is suitable for use in service The invention relates to the real-time monitoring of the bending moment of the aircraft wing by using the measured strain measured by the optical fiber grating on the aircraft in the aircraft fatigue test, and belongs to the technical field of test and measurement. Background technique: [0002] The wing of an aircraft is one of the important structural components of the aircraft and a key factor to ensure the safe flight of the aircraft. During the entire life cycle of the aircraft, the aircraft wing will experience a specific load history, which is a key factor in determining the service life of the aircraft wing, and...

AI Technical Summary

Problems solved by technology

At present, my country has not yet realized the long-term, real-time online monitoring of the bending moment of the wing of the aircraft in service. The existing method of wing load research is based on the monitoring method of strain gauges, which can only realize individual aircraft Short-term monitoring, and the measurement equipment is complicated, the calibration process is cumbersome, and the reliability is low. It is impossible to calibrate every aircraft in service, and it is impossible to realize long-term, real-time online monitoring of the aircraft.

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