Wing deformation measurement using the stereo-vision …
2021年12月1日 · For flight testing of a new aircraft, wing deformation measurement is both vital in terms of checking aerodynamic characteristics and verifying the theoretically predicted wing bending and torsion [1]. Commonly wing deformation is measured by bonding fiber optic or conventional strain gauges and/or accelerometers on the structure [2], [3], [4 ...
What is needed is a way to compute the deflected shape of an entire three dimensional structure using strain measurements from discrete locations. This would vastly improve the ability to monitor the health and behavior of a complex three dimensional structure such …
surface strain measurements along the wing, and measurement of the wing’s actual deformation under load. These requirements were met by implementing a fiber optic strain-sensing (FOSS) system on a full-scale ground loads test of a large span wing from an unmanned aerial vehicle, the Global Observer
This paper presents a new method to measure wing deflections in flight for small UAVs. It employs a pair of high resolution stereo cameras and LED wing markers, as well as a small form factor computer for control and storage. Post-processing of all the data is done off-line. Accuracy benchmark tests are conducted.
Strain transfer characteristics of surface-attached FBGs in …
2020年4月1日 · The test results show that the strain measurement method based on the surface-attached FBGs is simple and reliable, and this method can be used to calibrate the surface-attached FBGs before use, and improve the accuracy …
deformation as a substitute to strain gages may yield lower testing costs while improving aircraft performance through reduced instrumentation weight. This technique was examined using a reliable strain and structural deformation measurement system. The objective of …
Measurement of aircraft wing deformation using fiber Bragg gratings
A feasible method of measuring the aircraft wing deformation based on fiber Bragg grating (FBG) is introduced. The strains of the wing can be obtained by means of FBGs attached on the surface of the model airfoil. A finite element model (FEM) is established to obtain the numerical analysis results of strain and deformation of the wing.
IPCT is an optical, non-intrusive measurement technique based on photogrammetry in combination with modern correlation algorithms developed for the Particle Image Velocimetry (PIV). The simplest IPCT set-up consists of one monochrome camera observing an object covered with a random dot pattern.
Strain transfer characteristics of surface-attached FBGs in …
2020年4月1日 · Dynamic deformations of aircraft wing can lead to changes in baseline length, which seriously affects the performance of ground height measurement and multi-phase central array imaging. It is very important to measure the deformation of aircraft wing with high accuracy in dynamic environment.
In order to provide higher accuracy for transfer alignment on aircraft, a surface-attached FBGs is designed for distributed deformation measurement of aircraft wing. To verify the measurement accuracy of the surface-attached FBGs, a strain calibration method of the surface-attached FBGs applied with the wing strain measurement is proposed.