自由声场中集群式有源控制系统降噪性能的影响因素研究

发布时间：2018-04-26 15:25

  本文选题：有源噪声控制 + 自由声场　； 参考：《西北工业大学学报》2017年04期

【摘要】：与集中式有源控制系统相比,集群式系统具有实现成本低、扩展灵活的优点,因此其降噪性能的影响因素研究对工程应用有指导意义。首先对集群式系统进行建模,并用最小二乘法求解出最优次级源强度;然后推导得出集群式系统与集中式系统等效的充分条件;最后,分析了不满足等效条件时,自由空间中控制单元划分和布局方式对降噪性能的影响。结果表明,集群式系统与集中式系统等效的充分条件是:系统误差传感器数小于或等于次级源数,并且控制单元声阻抗矩阵与系统声阻抗矩阵都满秩。在不满足上述条件时,只要满足以下2个条件,集群式系统的性能损失很小:a)各控制单元内误差传感器数要不都大于等于次级源数,要不都小于等于次级源数;b)各控制单元子阻抗矩阵满秩。
[Abstract]:Compared with the centralized active control system, the cluster control system has the advantages of low cost and flexible expansion, so the research on the influencing factors of its noise reduction performance has guiding significance for engineering application. First, the cluster system is modeled, and the optimal secondary source strength is solved by the least square method. Then the sufficient conditions for the cluster system to be equivalent to the centralized system are derived. Finally, when the equivalent condition is not satisfied, The effect of control unit partition and layout on noise reduction in free space. The results show that the sufficient condition that the cluster system is equivalent to the centralized system is that the number of system error sensors is less than or equal to the number of secondary sources, and the acoustic impedance matrix of the control unit and the acoustic impedance matrix of the system have full rank. When the above conditions are not satisfied, as long as the following two conditions are satisfied, the performance loss of the cluster system is very small: a) the number of error sensors in each control unit is either greater than or equal to the number of secondary sources. Either the subimpedance matrix of each control unit is less than or equal to the number of secondary sources.
【作者单位】： 西北工业大学航海学院;中航工业陕西飞机工业(集团)有限公司;
【基金】：民用飞机专项科研项目(MJ-2015-F-044)资助
【分类号】：TB535
，

本文编号：1806589