The transport and civil industry research has been aiming at improving vibro-acoustic performance of panel-like structures such as trim panels, glazing windows or separating walls. Focusing on the airborne path, the application of an active control for optimizing the plate acoustic isolation performance is here investigated. A transmission model of an acoustically excited plate is derived in the time domain predicting the plate velocity and its acoustic radiation. The dynamic system is modelled together with the control loop in MATLAB where a suitable control algorithm for enhancing the panel transmission loss performance is developed.
The spread of smart structures has recorded a significant increase during the last decades. Nowadays these solutions are
applied in various fields such as aerospace, automotive and civil constructions. This kind of structures was born in the
past in order to cope with the high vibrations that every lightweight structure has to face. In order to reduce weight
designers usually decide to use very thin and lightweight structures. In the automotive field, for example, a reduced fuel
consumption is obtained employing lightweight materials. However, in general a worsening of the vibroacoustic
comfort is obtained with undesired vibrations that can be really annoying for passengers and dangerous for the structure
itself. This work presents an innovative smart plate that is able to actively vary its dynamic properties, by means of an
IMSC control logic, in order to improve the acoustic performances. An investigation about the system response in the
high frequency range allowed to assess the behavior in terms of absorption, reflection coefficient and transmission loss.
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