engleski

Active structural acoustic control of gear-box systems using a pair of piezo-based rotating inertial actuators

In this paper, two Piezo-Based Rotating Inertial Actuators (PBRIAs) are considered for the suppression of the structure-borne noise radiated from gearbox systems. As add-on devices, they can be directly mounted on a rotational shaft, in order to intervene as early as possible in the transfer path between disturbance source and the noise radiators. A feedforward control strategy similar to the FxLMS control algorithm is proposed to generate the appropriate actuation signals. Since the add-on devices rotate along with the shaft, the strategy aims to limit the influence of the secondary plant variation over the course of the shaft revolution on the control performance. The proposed active vibration control approach is tested on an experimental test bed comprising a rotating shaft mounted in a frame to which a noise-radiating plate is attached. The disturbance force is introduced by an electrodynamic shaker. The experimental results show that when the shaft rotates below 180 rpm, more than a 15 dB reduction can be achieved in terms of plate vibrations, along with a reduction in the same order of magnitude in terms of noise radiation.

Piezoelectric element, rotating inertial actuator, FxLMS, active structural acoustic control

nije evidentirano