An active control strategy for achieving general cluster control in structural-acoustic systems (original) (raw)
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The demands for improvement in sound quality and reduction of noise generated by vehicles are constantly increasing, as well as the penalties for space and weight of the control solutions. A promising approach to cope with this challenge is the use of active structural-acoustic control. Usually, the low frequency noise is transmitted into the vehicle’s cabin through structural paths, which raises the necessity of dealing with vibro-acoustic models. This kind of models should allow the inclusion of sensors and actuators models, if accurate performance indexes are to be accessed. The challenge thus resides in deriving reasonable sized models that integrate structural, acoustic, electrical components and the controller algorithm. The advantages of adequate active control simulation strategies relies on the cost and time reduction in the development phase. Therefore, the aim of this paper is to present a methodology for simulating vibro-acoustic systems including this coupled model in a...
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This paper introduces a method to control structural sound radiation using multiple structural sensors. Tonal radiation from a vibrating arbitrary structure is considered in this paper. Based on the estimation of the vibration profile of a noise radiating structure, spatial signals that represents radiated pressure field can be generated. These spatial signals can also be spatially weighted to control radiated noise at some far-field regions more than at others. Numerical studies on a simply-supported plate were performed which demonstrate the ability of the proposed method to control sound radiation that is spatially weighted over certain regions in the far-field.
The work describes the experimental implementation of a spatial vibration control strategy using multiple structural sensors distributed over the structure. The control strategy incorporates the spatially weighted vibration objective/ performance function that needs to be minimised for achieving vibration control at certain spatial regions. Experiments have been undertaken which were focused on a rectangular panel structure with a number of accelerometers attached. An filtered-X least mean squared (FX-LMS)-based adaptive algorithm has been employed to achieve vibration control at spatial regions of interest by utilising a continuous spatial weighting function. The experimental results demonstrate the effectiveness of the spatial control strategy that can be used for controlling vibration at certain regions that are caused by tonal or broadband excitation.