A novel fiber optic system for measuring the dynamic structural behavior of parachutes


El-Sherif M., Fidanboylu K. , El-Sherif D., Gafsi R., Yuan J., Richards K., ...More

JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES, vol.11, no.5, pp.351-359, 2000 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 5
  • Publication Date: 2000
  • Doi Number: 10.1177/104538900772664693
  • Title of Journal : JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
  • Page Numbers: pp.351-359

Abstract

A novel approach has been developed for real-time characterization of a parachute during inflation. Two techniques were applied to measure static and dynamic stresses in a parachute canopy fabric material and suspension lines: the modal power distribution (MPD) technique and the fiber Bragg grating (FBG) technique. Several tests were conducted under various loading conditions, using a bi-axial tensile tester. The MPD technique was used to measure the transverse stresses in the parachute canopy fabric material and was applied using two experimental set-ups: one using a CCD camera and the other using a photo-detector. The FBG technique was used to measure the axial stresses in the parachute canopy fabric material. The tests were performed using the spectrum analyzer set-up with the bi-axial machine. Finally, a drop test was performed on the parachute canopy fabric material using the MPD technique with the photo-detector set-up.