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中文核心期刊

汽车路噪的自适应有源控制算法性能比较

Performance comparison of adaptive active control algorithms for automotive road noise

  • 摘要: 汽车路噪的有源控制通常采用前馈自适应有源噪声控制系统, 目前滤波参考最小均方算法及其衍生算法因结构简单、鲁棒性好在该场景中广泛应用, 此外也有频域算法和子带算法等应用研究, 但这些算法的综合性能尚未得到充分验证和比较。为此, 基于一辆电动汽车副驾驶位的有源降噪头枕系统的初级噪声和传递函数, 通过仿真全面比较了多种自适应有源控制算法的收敛速度、降噪量和计算复杂度。结果表明, 与时域滤波参考最小均方算法相比, 频域算法可大幅降低运算量, 但由于算法引入延时降低了收敛速度; 子带算法收敛速度快、降噪量大且计算复杂度较低; 频域分块滤波参考最小均方算法的收敛速度和降噪量与子带算法相仿, 其运算量高于频域算法, 与分块数相关。这些算法都难以在较短的时间内收敛至维纳解, 在实际应用中可根据硬件配置、系统复杂度和收敛性能之间的均衡选择不同的算法。

     

    Abstract: In automotive road noise control, feedforward adaptive active noise control systems are typically employed. Currently, the filtered-x least mean square (FxLMS) algorithm and its derivatives are widely adopted due to their simple structure and robustness. Additionally, the frequency-domain algorithms and subband algorithms have also been studied. However, the comprehensive performance of these algorithms in the complex scenario of automotive road noise control has not yet been fully validated and comparatively analyzed. This study conducts a simulation-based comparison of multiple adaptive active control algorithms, leveraging primary noise data and transfer functions from an active headrest system for the passenger seat of an electric vehicle. The evaluation focuses on their convergence speed, noise reduction level, and computational complexity. Results demonstrate that the frequency-domain algorithms can substantially reduce computational load compared to time-domain FxLMS, though the introduced delay may degrade the convergence speed. The subband algorithms exhibit rapid convergence, high noise reduction, and relatively low computational complexity. The frequency-domain block FxLMS algorithms can achieve convergence speed and noise reduction comparable to the subband algorithms. Its computational complexity is higher than that of the frequency-domain algorithms and related to the number of blocks. None of the algorithms converges to the Wiener solution within short timeframes, indicating that in practical implementations, different algorithms should be adopted based on the trade-offs among hardware configuration, system complexity and convergence performance.

     

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