Abstract
A multi-channel global control method is proposed in combination with active isolators to suppress tonal vibration transmission in structures. This method is built on a modified adaptive control algorithm and the mutual interferences in control channels are compensated. The efficacy of the global control method is investigated by using a mechanical system, which consists of a hull structure, a controllable vibration source and four active mounts. A dynamic model of the mechanical system is established and the results of numerical simulation indicate that the global control method is more effective as the channel interferences are compensated and the convergence rate of it is faster than the local control method, which considers the local vibration feedback only. Experimental results also demonstrate that the global control method is able to suppress tonal vibration transmission effectively, even in the circumstance of strong mutual interferences in control channels.
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