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In this paper, a multiple model approach is utilised to improve the transient performance of an adaptive resonant controller. The proposed controller, Multiple Model Adaptive Resonant Controller (MMARC), is applied to attenuate vibrations in a cantilever beam structure with large varying parameters. On-line estimation of the structure’s natural frequencies is used to up-date the adaptive resonant controller’s parameters. A very simple supervisor scheme based on the system’s vibration frequency measurement is proposed to reduce the computation burden of the multiple model strategy. Simulation results show that the proposed MMARC strategy can achieve better transient response than a single adaptive controller.