An inertial actuator, also known as a proof mass actuator (PMA), applies structural forces by reacting against an inertial mass. A class of recently developed piezoceramic PMAs is introduced and is applied to reduce vibration and structure-borne noise. The design incorporates displacement amplification to efficiently achieve low resonant frequency. A method is presented for assessing the efficiency of a piezoceramic PMA and comparing the power density of competing PMA technologies (i.e. voice-coil vs. piezoceramic vs. magnetostrictive). The performance of the PMA is demonstrated by measuring the force generated against an infinite impedance and by measurements on a structure representative of a turbo-prop fuselage. The experimental testing demonstrates the validity of a simple vibration absorber model in understanding PMA performance on complex structures.
Interial piezoceramic actuators for smart structures
Piezokeramische Trägheitsaktoren für smarte Strukturen
1995
12 Seiten, 12 Bilder, 9 Quellen
Conference paper
English
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