| 考虑电感特性的扬声器线性参数辨识 |
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| 引用本文： | 朱志鹏,沈勇,刘紫赟.考虑电感特性的扬声器线性参数辨识[J].应用声学,2017,36(1):9-15. |
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| 作者姓名： | 朱志鹏 沈勇 刘紫赟 |
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| 作者单位： | 南京大学声学研究所 近代声学教育部重点实验室,南京大学声学研究所 近代声学教育部重点实验室,南京大学声学研究所 近代声学教育部重点实验室 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 当扬声器单元在其有效频率范围内所体现出的电感特性不可忽略时,采用纯电阻模型进行线性参数辨识得到的直流电阻辨识结果会与测量值产生较大偏差。根据对单元电感特性的讨论,建立了考虑等效电感的离散时间系统模型,推导了基于IIR自适应滤波器实现对直流电阻和等效电感辨识的迭代公式,并通过实验给出了与采用纯电阻模型进行参数辨识的结果对比,结果对比表明考虑电感的模型可以更为有效和稳定地实现对扬声器单元直流电阻的实时辨识。
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| 关 键 词： | 智能功放，电感特性，直流电阻，参数辨识 |
| 收稿时间： | 2016/4/25 0:00:00 |
| 修稿时间： | 2016/12/22 0:00:00 |
Loudspeaker linear parameters identification considering electrical inductance |
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| ZHU Zhipeng,SHEN Yong and LIU Ziyun.Loudspeaker linear parameters identification considering electrical inductance[J].Applied Acoustics,2017,36(1):9-15. |
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| Authors: | ZHU Zhipeng SHEN Yong and LIU Ziyun |
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| Institution: | Key Laboratory of Modern Acoustics, MOE, and Institute of Acoustics, Nanjing University,Key Laboratory of Modern Acoustics, MOE, and Institute of Acoustics, Nanjing University,Key Laboratory of Modern Acoustics, MOE, and Institute of Acoustics, Nanjing University |
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| Abstract: | The identified DC resistance results under pure resistance model may lead to significant biases when the tested units embody non-ignorable electrical inductance at midrange and high frequency part. With brief discussion of such effect, we derive the difference equation of the electrical part considering electrical inductance and further derive the iterative formula for the electrical part linear parameters identification based on adaptive IIR filter. The following experiment shows the DC resistance identification results under model considering electrical inductance are much more effective and stabilized than that under the pure resistance model. |
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| Keywords: | Smart power amplifier Loudspeaker electrical inductance DC resistance Parameter identification |
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