选频有源噪声控制系统控制算法的理论与实验研究
文献类型：学位论文
| 作者 | 赵洪亮 |
| 学位类别 | 博士 |
| 答辩日期 | 2004 |
| 授予单位 | 中国科学院声学研究所 |
| 授予地点 | 中国科学院声学研究所 |
| 关键词 | 有源噪声控制 自适应滤波器 次级通道 系统辨识 选频滤波器 |
| 中文摘要 | 本文以实际问题中常见的以若干谱线成分为主的有色噪声的有源控制问题为应用背景，对选频有源噪声控制（FSFANC）系统进行了系统性的研究。现有的有源噪声控制（ANC）系统难以有效地处理这种噪声。本文在Meurers等人提出的FSFANC算法（Meurers算法）的基础上，对FSFANC系统进行了全面、深入的研究工作，提出了多种FSFANC方案，进行了详细的理论分析、计算机仿真和实验工作。本文的主要创新之处为：（1）提出了一种改进的正交分解结构。该结构是一个只有两个系数的FIR型数字滤波器，两个系数分别为系统频率响应的实部和虚部。与标准正交分解结构相比，该结构的优点是不需要进行希尔伯特变换，不但大大简化了计算，还给系统的严格理论分析带来了方便。它把对信号的时域处理与频域处理有机地结合在了一起。（2）把改进正交分解结构用于FSFANC系统的研究，提出了基于正交分解结构的FSFANC算法，进行了严格的理论分析。该算法不但解决了现有FSFANC算法对频率误差过度敏感以致对频率估计精度要求过高的局限性，还具有结构简单、稳定性高、收敛速度快、计算量少等优点。（3）针对PSFANC系统的特点，提出了采用附加正弦信号方法进行次级通道在线辨识的方法，并给出了基于正交分解结构的辨识系统和算法，该方法可以获得较高的辨识精度。（4）提出了一种不需要次级通道辨识的FSFANC算法，该算法把单纯形寻优方法引入ANC问题的研究，给出了一条解决ANC次级通道问题的新途径。论文的研究成果完善了FSFANC系统的控制算法理论，丰富和发展了ANC系统的研究成果。对于解决常见的以若干谱线成分为主的有色噪声的有源控制问题有具有重要的指导意义。 |
| 英文摘要 | In practical applications, the noise to be controlled is often dominated by several major frequency components, and a common active noise control system would be less effective in this case because of the divergence of the eigenvalues. This thesis presents a study on the active noise control system based on the frequency-selective filter (FSFANC) that is implemented by introducing a frequency-selective filter (FSF) in the reference signal input channel. Theoretical analysis, computer simulations, and laboratory experiments are systematically conducted. The main original contributions can be highlighted as follows. (1) A new system structure based on the modified notch filter is suggested as a FIR filter with only two coefficients, the real and imaginary part of the frequency response of the system. Compared with a standard notch filter, it doesn't need Hilbert transform, which not only simplifies the computational complexity but also makes the accurate theoretical analysis possible. (2) A new FSFANC algorithm based on the modified notch filter is proposed. It gets rid of the dependence of the existing FSFANC algorithm on accurate frequency estimations, and has some important advantages including simple structure, robust stability, fast convergence rate, and less computation. (3) A new on-line secondary path identification algorithm based on the modified notch filter is proposed, it can get the accurate identification results by addition of sinusoidal signals into the FSFANC system. (4) A new FSFANC algorithm using the simplex search method and without the secondary path identification is proposed. The theoretical analysis, computer simulations and experimental results in the thesis give a comprehensive understanding to the FSFANC system. The progress is important to the noise control practice in such cases. |
| 语种 | 中文 |
| 公开日期 | 2011-05-07 |
| 页码 | 132 |
| 源URL | [http://159.226.59.140/handle/311008/820]  |
| 专题 | 声学研究所_声学所博硕士学位论文_1981-2009博硕士学位论文 |
| 推荐引用方式 GB/T 7714 | 赵洪亮. 选频有源噪声控制系统控制算法的理论与实验研究[D]. 中国科学院声学研究所. 中国科学院声学研究所. 2004. |
入库方式： OAI收割
来源：声学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。