Noise barrier using hybrid ANC system (Proposal and application of an adaptive robust feedback ANC system)
Noise barrier using hybrid ANC system (Proposal and application of an adaptive robust feedback ANC system)
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DOI：
10.1299/transjsme.15-00532
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发表时间：
2016
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影响因子：
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通讯作者：
Xun Wang;Yosuke Koba;S. Ishikawa;S. Kijimoto
中科院分区：
文献类型：
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作者：
Xun Wang;Yosuke Koba;S. Ishikawa;S. Kijimoto
本文提出了一种自适应鲁棒反馈（FB）主动噪声控制（ANC）系统，并将其应用于先前开发的采用混合（HB）ANC系统的主动声屏障（ANB），旨在缓解室内噪声问题。对于这种小型ANB应用，FB控制是优选的，因为FB控制系统仅需要误差传感器，从而可以容易地实现紧凑的控制器。然而，在实践中，FB控制器的鲁棒稳定性必须加以考虑。此外，FB控制的水床效应将导致目标控制频带之外的某些频率处的噪声增强。为了在实时控制中设计具有有限噪声增强的鲁棒控制器，（modified FDB-LMS，MFDB-LMS）算法，该算法与传统的FDB-LMS算法相比，在保持稳态性能的同时，降低了算法复杂度，由于频域自适应过程中的鲁棒稳定性和噪声增强约束易于验证。然后，内模控制（IMC）型FB-ANC系统利用MFDB-LMS算法，其中的约束，以保证鲁棒稳定性和限制噪声增强到一个给定的值内，已被集成，提出并应用于ANB。仿真结果验证了所提出的FB-ANC系统的有效性和使用该系统的ANB的噪声衰减性能。
In this paper, an adaptive robust feedback (FB) active noise control (ANC) system is proposed and applied to the previously developed active noise barrier (ANB) using a hybrid (HB) ANC system, which aims to relieve the indoor noise problem. The FB control is preferred for this small-typed ANB application because only error sensor is required for the FB control system so that a compact controller can be easily realized. In practice, however, the robust stability of the FB controller must be considered. Moreover, the waterbed effect of the FB control will cause noise enhancement at some frequencies out of the target band of control. In order to design a robust controller with limited noise enhancement in real-time control, a modified frequency domain block LMS (modified FDB-LMS, MFDB-LMS) algorithm, which has the reduced computation complexity and the same steady-state performance comparing with the conventional FDB-LMS algorithm, is proposed in this paper, firstly, owing to the easiness to verify the robust stability and the noise enhancement constraints in the frequency domain adaptive process. Then, an internal model control (IMC) typed FB-ANC system exploiting the MFDB-LMS algorithm, into which the constraints to guarantee the robust stability and limit the noise enhancement to within a given value has been integrated, is proposed and applied to the ANB. The effectiveness of the proposed FB-ANC system and the noise attenuation performance of the ANB using the proposed system have been validated by simulations.