文章摘要
韦峻峰,冯海泓,张平.前馈型低频非线性失真补偿器的仿真与实验[J].声学技术,2011,(5):432~437
前馈型低频非线性失真补偿器的仿真与实验
Computational and experimental study of low frequency nonlinear distortion compensator with feed-forward structure
投稿时间:2011-05-05  修订日期:2011-07-27
DOI:
中文关键词: 扬声器  非线性失真  反馈线性化  前馈补偿器
英文关键词: loudspeaker  nonlinear distortion  feedback linearization  feedforward compensator
基金项目:
作者单位E-mail
韦峻峰  wjfs@163.com 
冯海泓   
张平   
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中文摘要:
      扬声器工作在大振幅时声信号中存在显著的非线性失真,该失真可通过常规非线性失真补偿技术减少。对一种基于反馈线性化理论的前馈型非线性失真补偿器进行了分析讨论,通过仿真得到了单个扬声器参数变化对补偿器性能的影响情况,并通过对扬声器样品的实验评估了补偿器的实际性能。实验结果表明,使用补偿器后扬声器声响应的低频部分谐波失真减少约10dB,而基频响应未发生改变。前馈型非线性失真补偿器可有效减小扬声器的常规非线性失真,可应用于多种扬声器系统中。
英文摘要:
      When a loudspeaker works with large displacement,nonlinear distortion can be found obviously in sound response signal.The distortion can be reduced by compensation techniques for regular nonlinear distortion.A feed-forward compensator for this purpose,which is based on the theory of feedback linearization,is discussed in this paper.The effects of the variation of loudspeaker parameters on the performance of the compensator are evaluated by simulation.The actual performance of the compensator is evaluated by experiments on loudspeaker samples.Results show that harmonic distortions at low frequency are reduced by about 10dB after compensation,while the fundamental response has no change.Therefore,the regular nonlinear distortion of loudspeaker response can be effectively reduced by the feedforward compensator,and the compensator can be applied to various loudspeaker systems.
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