基于声辐射模态的作动器对称位置的研究

在汽车噪声优化控制领域中,作动器位置布置会影响噪声控制效果。以简支板为例,根据声辐射模态的解耦主动控制的控制方法已经取得了良好的降噪效果,但作动器的不同对称位置布置对降噪产生的效果以及所需电压值是不同的。提出将分别对前四阶声辐射模态建立电压模型,对前八阶声辐射模态建立声功率模型,通过在MATLAB上进行仿真,结果确定能使所需电压最小,控制效果最好的理想降噪对称位置。

Research of Symmetry Position of Actuator Based on Theory of Radiation Modes

Research the location layout of actuator effects control in automobile noise control.With an example of simply supported panel,based on the theories of Active Structural Acoustic Control and radiation modes,this control method has achieved good effect of noise reduction,and the control equation can be decoupled.Different symmetry positions of actuator brings different influence on radiation modes and voltage value.This paper established the model of the minimum voltage to the first four radiation modes.For the first eight radiation modes,it established the model of the most whispered power.The ideal symmetry position was found with simulation calculation by MATLAB.