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4 October 1994 Challenges to design and demonstrate fiber optic sensors on an aircraft engine
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Fiber optic sensing techniques for measuring temperature, position, speed, and flame presence were passively demonstrated on the F404-400 augmented turbofan engine for the NASA FOCSI (Fiber Optic Control System Integration) program. From early definition through detail design, fabrication, and testing, these components began to meet requirements as candidates for future engine product applications. In this paper we describe a number of issues that were considered leading to engine ground and flight testing for FOCSI, and some issues that surfaced as a result of the program. Functionality of the FOCSI sensor set is described. Emphasis is placed on setting goals of fully meeting performance requirements over the entire range of service conditions. Some fundamental mechanical design ground rules are presented, and issues associated with using fiber optic cables and electro-optic circuitry are exposed. Finally, some methods of installing demonstrational sensor hardware and acquiring the sensor measurements while minimizing interference with normal engine operation are described.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gary L. Poppel and Kiyoung Chung "Challenges to design and demonstrate fiber optic sensors on an aircraft engine", Proc. SPIE 2295, Fly-by-Light, (4 October 1994); doi: 10.1117/12.188844;

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