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首页> 外文期刊>International Journal of Vehicle Noise and Vibration >Application of H-infinity hybrid active controller for acoustic duct noise cancellation
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Application of H-infinity hybrid active controller for acoustic duct noise cancellation

机译：H-Infinity混合有源控制器在消声管道噪声中的应用

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摘要

This paper describes the principle and application of a hybrid robust active noise controller (ANC) for reducing broadband noise in acoustic ducts. The proposed ANC system consists of an adaptive controller with filtered-x least mean square (FXLMS) algorithm and a feedback structure with robust synthesis theory for obtaining robust performance and stabilisation. In an active control structure, plant uncertainty is one of the major factors that may affect the performance as well as stability of a system and must be taken into account in controller design. In this study, the controller is designed by frequency domain method and implemented on a digital signal processor (DSP) platform for real time control. Experiments are carried out to evaluate the attenuation performance of the proposed control system for synthetic random noise in an acoustic duct. The experimental results indicate that the proposed hybrid controller is effective in suppressing the undesired broadband noise. Furthermore, characteristic analysis and experimental comparison of adaptive feedforward structure, pure feedback control structure and proposed hybrid structure for reducing the noise in a duct are also presented in this paper.
机译：本文介绍了一种混合鲁棒有源噪声控制器（ANC）的原理和应用，该控制器可降低声管中的宽带噪声。拟议中的ANC系统包括具有滤波x最小均方（FXLMS）算法的自适应控制器和具有鲁棒综合理论的反馈结构，用于获得鲁棒的性能和稳定性。在主动控制结构中，设备不确定性是可能影响系统性能和稳定性的主要因素之一，在控制器设计中必须考虑这些因素。在本研究中，控制器是通过频域方法设计的，并在用于实时控制的数字信号处理器（DSP）平台上实现。进行了实验，以评估所提出的控制系统对声导管中合成随机噪声的衰减性能。实验结果表明，提出的混合控制器在抑制不希望的宽带噪声方面是有效的。此外，本文还介绍了自适应前馈结构，纯反馈控制结构和拟议的混合结构以减少管道噪声的特性分析和实验比较。

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