Research on the Design of Feedback Active Adaptive Sound Field Control Systems on Frequency Domain

基于频域模型匹配的自适应部分模型匹配控制方法利用了被控对象在有限个频点处的多个频率响应的知识。由于人的听觉也可以用频率特性来表征，因此这种设计技术有可能设计出反馈形式的声场控制系统。基于上述观点，我们得到了关于反馈自适应有源声场控制系统设计的下列结果。（1）基于频域局部模型匹配的声场控制研究了理想声场模型的选择准则、匹配频率的个数、匹配频域的范围。（2）反馈式有源声场控制系统的二自由度结构通过将匹配频域划分为两部分，提出了在不同的频域上采用不同的频率控制器。该方法对于非线性引起的具有复杂频率特性的声场系统是有效的。（3）音频伺服系统的设计（4）非线性对象的自适应控制算法和自适应振动控制系统的发展为了将来的应用，对基本的自适应控制算法和一般的主动振动控制概念进行了研究，上述结果已在几个国家和国际会议上发表，并提交（或准备提交）给几个期刊。关于内容（1），我们的一名研究生（合作研究员）获得了SICE青年研究员最佳演讲奖。

Adaptive Partial Model Matching Control method based on model matching on frequency domain utilizes the knowledge of several frequency responses of the controlled plant at finite number of frequency points. Hence this design technique has had the possibility to design sound field control systems in the feedback form because the human auditory sense can also be characterized by frequency characteristics.Based on the above stated view point, we have obtained following results concerning the design of feedback adaptive active sound field control systems.(1)Sound field control based on partial model matching on frequency domainThe criterion of the choice of the ideal sound field model, number of matching frequencies, a range of matching frequency domain are investigated.(2)2-degree-of-freedom construction of the feedback active sound field control systemsIt is proposed to use different frequency controllers which correspond to different frequency regions by dividing the matching frequency domain into 2-parts. This method is effective for sound field system having complex frequency characteristics caused by nonlinearities.(3)Design of audio servo system(4)Development of adaptive control algorithms for nonlinear plants and adaptive vibration control systemBasic adaptive control algorithms and general active vibration control concepts have been investigated for future application.Above stated results has been presented several national and international conferences and submitted (and prepare to submit) to several Journals. Concerning the content (1), one of our graduate students (co-researcher) obtained the best presentation award for young researchers from SICE.