A preliminary performance validation of a MEMS accelerometer for blade vibration monitoring

Andrea Rossi, Francesco Orsini, Andrea Scorza, Fabio Botta, Fabio Leccese, Enrico Silva, Kostiantyn Torokhtii, Ivan Bernabucci, Salvatore Andrea Sciuto

Abstract

Nowadays a large number of studies are being carried out on active vibration control, especially in the aeronautical gas turbine industry. Indeed, uncontrolled vibration in aeronautical engine blades can lead to fatigue failure with catastrophic consequences. For this reason, many efforts are made to implement an embedded active vibration control on rotors. Furthermore in this particular kind of application a compact, integrated and robust system, controlled by a wireless remote system, is necessary. Before designing the vibration active control it is mandatory to characterize the vibration monitoring system of the blade in order to develop a feedback system for active damping. To this regard a MEMS accelerometer for mobile applications (MEMSWMAA) may be considered a good choice, since the wireless features are relevant in a rotor vibration monitoring application, its cost is usually low and its size and weight allow to obtain a lower insertion effect. However, the metrological limits of this type of sensors are not well investigated. In this work a preliminary characterization of a MEMSWMAA for blade vibration monitoring application is proposed. In particular the authors evaluate the actual performance of MEMSWMAA by means of a direct and simultaneous comparison with a reference sensor. The frequency range of investigation (10 Hz up to 1080 Hz) includes the first three resonant frequencies of a cantilever beam that will be used in a future work to experimentally validate the vibration control algorithm.

Keywords

acceleration, measurements, MEMS, vibration, frequency,

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DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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