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An adaptive method for designing a robust IMC structured feedback active noise controller

机译：一种设计鲁棒IMC结构反馈有源噪声控制器的自适应方法

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In this paper, a method for designing a robust internal model control (IMC) structured feedback active noise controller is considered. For feedback active noise control (ANC) systems, the IMC structure is preferred because of the possibility of applying an adaptive filter in the controller and the simplicity of satisfying the stability if an accurate secondary path model is available. In practice, however, model uncertainties exist so that the robust stability of the controller must be considered during the controller design process. Moreover, the waterbed effect for feedback control of a time-delayed system will cause noise amplification (NA) at some frequencies out of the target band of control. Against these problems, this paper proposes a controller design method in which a constraint for the control filter coefficients is found to ensure the robust stability and limit the NA caused by the waterbed effect to within a given value. In comparison with the design process in the frequency domain, this method can use an adaptive algorithm to obtain a robust controller solution in the time domain. Once the time domain constraint has been obtained, it can also be used in the online IMC feedback ANC system. Computer simulations and experiments in an anechoic chamber are performed to validate the method. The results indicate that this method is effective for the design of a robust controller with constrained NA. (C) 2015 Institute of Noise Control Engineering.
机译：在本文中，考虑了一种用于设计鲁棒内部模型控制（IMC）结构的反馈有源噪声控制器的方法。对于反馈有源噪声控制（ANC）系统，IMC结构是首选的，因为可以在控制器中应用自适应滤波器，并且如果可以使用精确的次级路径模型，则可以轻松满足稳定性。但是，实际上存在模型不确定性，因此在控制器设计过程中必须考虑控制器的鲁棒稳定性。此外，用于时滞系统的反馈控制的水床效应将导致超出目标控制频带的某些频率处的噪声放大（NA）。针对这些问题，本文提出了一种控制器设计方法，其中找到控制滤波器系数的约束条件，以确保鲁棒稳定性并将水床效应引起的NA限制在给定值内。与频域中的设计过程相比，该方法可以使用自适应算法在时域中获得鲁棒的控制器解决方案。一旦获得了时域约束，它也可以在在线IMC反馈ANC系统中使用。在消声室内进行计算机模拟和实验以验证该方法。结果表明，该方法对于设计具有约束NA的鲁棒控制器是有效的。 （C）2015噪声控制工程学院。

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