Experimental demonstration of active broadband vibration suppression of a rectangular plate using gain-weighted, shaped distributed transducers
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This paper discusses the experimental implementation of an array of gain-weighted, shaped transducers applied to a rectangular plate. The transducer distribution, equivalent for both sensor and actuator, was designed to be colocated and couple evenly into all modes within a given control bandwidth. Active broadband vibration control was achieved in the presence of both transient and continuous disturbances. The control bandwidth chosen for this experiment included the first 15 modes of the plate. Both colocation and balanced modal coupling were demonstrated. The settling time of the system was reduced by more than fifty percent using velocity feedback. Additionally, a sensitivity of the sensor distribution to low frequency acoustic disturbances was observed but was not destabilizing. This sensitivity was experimentally attributed to the hydrostatic response mode of the sensor.
