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Various sensors exist for measuring torsional vibrations in rotating machinery. When acquiring torsional vibration measurements on a physical system, it is important that the noise floor of the measurement system be lower than that of the response. The goal of this work is to develop an experiment to compare the noise floor of various torsional vibration sensors. A test fixture has been designed and...
Experimental modal analysis is used to measure the dynamic characteristics of a structure. Traditionally, excitation is provided with either a shaker or an impulse hammer. An alternative approach is to use power electronics for powering the generator; generating a torque impulse. This torque excitation replicates much of the engine's excitation, emphasizing the vibrational modes that are assorted...
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