Near-field sensing strategies for the active control of the sound radiated from a plate
Near-field sensing strategies for the active control of the sound radiated from a plate
复制标题
DOI：
10.1121/1.428193
复制
发表时间：
1999-11
影响因子：
2.4
通讯作者：
A. Berry;X. Qiu;C. Hansen
中科院分区：
文献类型：
--
作者：
A. Berry;X. Qiu;C. Hansen
当设计主动控制系统来全局控制来自振动表面的远场声辐射时，一个具有挑战性的问题是正确定义近场声学传感策略和控制器要最小化的成本函数类型。本文研究了振动板自由场辐射主动控制中离散位置近场主动强度的传感和最小化策略。针对这个问题，导出了使用声学控制源在误差传感器位置处的近场、正常有源声强之和的最佳最小化，并将获得的结果与近场平方压力之和的最小化进行了比较。指出了与声音强度最小化相关的一些困难。
When designing an active control system to globally control the far-field sound radiation from a vibrating surface, a challenging problem is to properly define the near-field acoustic sensing strategy and the type of cost function to be minimized by the controller. The strategy of sensing and minimizing the near-field active intensity at discrete locations in the active control of free field radiation from a vibrating plate is investigated in this paper. The optimal minimization of the sum of the near-field, normal active sound intensities at the error sensor locations using acoustic control sources is derived for this problem, and the results obtained are compared to the minimization of the sum of the near-field squared pressures. Some of the difficulties associated with sound intensity minimization are pointed out.