摘要
在声辐射模态有源噪声控制策略框架下,选择压电陶瓷片作为控制作动器。根据前四阶声辐射模态形状特点提出了四种压电作动器位置布置方法。理论分析及数值计算表明,以这种方式布放的压电作动器不仅能有效地降低结构辐射的声功率,而且控制过程中这四组作动器分工明确,从而将控制方程解耦。在控制前几阶声辐射模态声功率时可以将复杂的多输入/多输出控制系统转变为几个简单的、互相独立的单输入/单输出控制系统。
With the theory of radiation modes, piezoceramics are used as control actuators in the system of active control of sound radiation. According to the characteristics of the first four radiation mocle shapes, four groups of actuators are presented. Theoretical analysis and numerical calculation demonstrate that the four groups of actuators can not only reduce the sound power effectively, but also make the decoupling of the control equations. While controlling of the sound power of the first four radiation modes, these actuators can convert the complicated control system of multiple input/output into several simple and each independent systems of single input/output.
出处
《声学学报》
EI
CSCD
北大核心
2009年第5期453-461,共9页
Acta Acustica
基金
国家自然科学基金资助项目(50475120)
