An experimental and analytical study of structural identification /
| Main Author: | |
|---|---|
| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1989.
|
| Subjects: | |
| Online Access: | ProQuest, Abstract Link to OAKTrust copy |
| Abstract: | A start to finish study of structural identification was performed. All phases of the problem (mathematical modeling, testing, modal identification, and structural identification) were studied. A unique optical sensor system and conventional strain gauges were used to generate a data set from both free and forced response tests. An expanded version of the Creamer/Junkins method was used to upgrade the model using both types of data from both types of sensors. A unique monolithic grid, instrumented with fiber optic targets, strain gauges, and reaction wheels was used as the test article. Resection techniques with planar control points were developed for static calibration of cameras. The efficiency of the optical data reduction was increased through the use of a non-real time video processor. Statistical information was propagated through the resection and triangulation processes. The System Equivalent Reduction and Expansion Process (SER EP) was used to estimate unmeasured degrees of freedom. The Eigensystem Realization Algorithm (ERA) was used as the primary means of modal identification. Real and imaginary parts of the frequency response function were used in the forced response analysis based on a proportional dam ping model. |
|---|---|
| Item Description: | Typescript (photocopy). Vita. "Major subject: Aerospace engineering." |
| Physical Description: | xiii, 162 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references. |