Abstract: According to the features of radiation modes, four groups of forces are presented. Based on this arrangement method, four independent controllers are designed by using theΗ∞algorithm. And the controllers can be uesd to control the first four acoustic radiation adjoint coefficients to minimize acoustic power. The method converts the complicated control system of four inputs/outputs into four simple independent systems of single input/output, thus each group of controlling forces can independently control the corresponding adjoint coefficient. The simulation result indicates that this method can realize decoupling control and decrease acoustic power obviously.

Key words: radiation modes, active structure acoustic control, robustΗ∞control, decoupling control, controller

摘要： 根据声辐射模态的特点提出四组控制力布置方法。在此基础上采用Η∞算法设计了四个独立的控制器，控制前四阶声辐射模态的伴随系数使辐射声功率最小化。该方法能够将复杂的四输入/四输出控制系统转化为四个独立的单输入/单输出系统，从而使得每组控制力可以单独控制对应阶声辐射模态的伴随系数。模拟仿真结果表明，该方法能够实现系统解耦控制，使辐射声功率明显降低。

关键词: 声辐射模态, 有源结构声学控制, 鲁棒Η∞控制Η, 解耦控制, 控制器