Development of a Holographic System for Avionics Durability Analysis and Validation Volume 1 - Text.
Abstract
This report documents the development of an Electro-Optic Holography (EOH) system for the measurement of mechanical displacements and strains on the microscale structures employed in current technology avionics. It begins with a description of the processes and mathematics of holography. This includes explanations of the illumination, observation, and sensitivity vectors as well as their relationships to the projection matrices. Next is a discussion and detailed mathematical development of the interpretation of holograms (both conventional and time-averaged) to extract displacement, rotation, and strain measurements. Experimental results illustrate the analysis. This is followed by a description of the EOH technique which includes a description of the experimental apparatus and measurement procedures, discussion of the computer based processing used to analyze the electronically captured interference images, procedures for the determination of three dimensional displacements, and a brief description of Electronic Shearography to contrast the two techniques. Experimental measurements of deformations in avionics are shown along with a discussion of how the EOH results can be merged with Finite Element Modeling (FEM) techniques during system design. This includes the description of a hybrid procedure to optimize the design for a specific target characteristic. Examples for the optimization of a cantilever plate are presented and discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1996
- Accession Number
- ADA320297
Entities
People
- Ryszard J. Pryputniewicz
Organizations
- Worcester Polytechnic Institute