Optical System for Dynamic Analysis of Rotating Structures.
Final technical rept. 20 Jan 75-20 Jan 77,
UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CONN
Pagination or Media Count:
It has been demonstrated that interferometric holograms can be recorded, of objects rotating at high speeds, in a manner sufficiently practical to permit test stand application. This was shown with the successful pictorial acquisition of the vibration characteristics of a TS22 fan stage, operated at speeds up to approximately 8000 rpm, at an outdoor Pratt and Whitney Aircraft test facility located near Bradley Field. The theoretical and experimental work leading up to, and including, these tests was performed during a two-year study, which is reviewed herein. The work included 1 a design study to Select a practical image derotation scheme 2 development of the hardware to complement the chosen method 3 laboratory tests of the system to illustrate its application to the optical analysis of rotating structures 4 consideration of the modifications and additions required for adaptation to an actual test stand environment 5 design, fabrication, and assembly of hardware suitable for test stand installation and 6 evaluation of the system at a Pratt and Whitney Aircraft test facility.
- Test Facilities, Equipment and Methods