A measurement system for nonintrusive monitoring of rotating blade vibration in turbomachines based on fiber optic sensors is presented. The design of the whole system is discussed; the development of special purpose sensors, their interfacing to the data acquisition system, and the signal processing are outlined. The processing algorithms are tested by software simulation for several possible blade vibrations. Experimental tests performed on different bladed rotors are presented. Results are compared to simultaneous strain gage measurements.

Issue Section:
Gas Turbines: Structures and Dynamics
Topics:
Design, Experimental characterization, Measurement systems, Rotating blades, Vibration, Algorithms, Blades, Computer software, Data acquisition systems, Fiber optic sensors, Rotors, Sensors, Signal processing, Simulation, Strain gages, Turbomachinery
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Copyright © 1994
 by The American Society of Mechanical Engineers
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