Adaptive-passive control of structure-borne noise of rotating machinery using a pair of shunted inertial actuators. (July 2016)

• Record Type: Journal Article
• Authors: Zhao, Guoying; Alujević, Neven; Depraetere, Bruno; Pinte, Gregory; Sas, Paul
• Is Part Of: Journal of intelligent material systems and structures. Volume 27:Number 12(2016)
• Page Start: 1584
• Page End: 1599
• Publication Date: 2016-07
• Subjects: Piezoelectric element -- rotating inertial actuator -- shunting -- adaptive-passive control -- structure-borne noise; Smart materials -- Periodicals; Intelligent control systems -- Periodicals; Artificial intelligence -- Periodicals; Matériaux intelligents -- Périodiques; Commande intelligente -- Périodiques; Intelligence artificielle -- Périodiques; 620.11
• DOI: 10.1177/1045389X15600080
• Languages: English
• ISSNs: 1045-389X

Abstract

In this article, two piezo-based rotating inertial actuators are considered for the suppression of the structure-borne noise radiated from rotating machinery. Each inertial actuator comprises a piezoelectric stack element shunted with the Antoniou's gyrator circuit. This type of electrical circuit can be used to emulate a variable inductance. By varying the shunt inductance it is possible to realise two tuneable vibration neutralisers to suppress tonal frequency vibrations of a slowly rotating machine. Also, reductions in the noise radiated from the machine housing can be achieved. First, a theoretical study is performed using a simplified lumped parameter model of the system at hand. The simplified model consists of a rotating shaft and two perpendicularly mounted shunted piezo-based rotating inertial actuators. Second, the shunted piezo-based rotating inertial actuators are tested on an experimental test bed comprising a rotating shaft mounted in a frame. The noise is radiated by a plate that is attached to the frame. The experimental results show that a reduction of 11 dB on the disturbance force transmitted from the rotating shaft through the bearing to the housing can be achieved. This also generates a reduction of 9 dB for the plate vibration and the radiated noise.