Abstract

In this paper, a method of linear quadratic Gaussian (LQG) control with an H/sub /spl infin// performance bound is modified for a robust active noise control design of an acoustic duct system. This H/sub /spl infin//-constraint LQG (LQG/H/sub /spl infin//) method is incorporated with an internal model principle to design robust internal model-based active noise controllers to attenuate a narrow-band disturbance noise in a duct. Computer simulation results show an enhanced robust control performance of this internal model-based LQG/H/sub /spl infin// design with respect to the variation of the disturbance noise frequency and demonstrate a global control performance along the duct. Experimental results further demonstrate its global performance robustness capability and support the feasibility of the proposed internal model-based LQG/H/sub /spl infin// design method.

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