基于辐射声压反馈的结构极点配置研究

Research on Structural Modal Pole Assignment by Sound Pressure Feedback

提出了基于声压反馈的结构振动声辐射主动控制的极点配置方法.该控制方法所使用的传声器不作为误差传感器,而是将所测得的声压信号作为反馈信号来对结构实施主动控制.以空气中平板结构为例,进行了数值仿真研究,结果表明,通过使用复数增益基于声压反馈可以配置结构的固有频率和阻尼比,从而实现基于声压反馈进行结构振动声辐射主动控制的目的.

An output feedback approach based on sound pressure measurement for pole placement is proposed. The active control of vibro-acoustic response using sound pressure feedback is numerically studied. The control performance is evaluated for the case of a baffled plate in air. This method does not use microphones as the error sensors, the acoustic pressures from the microphones are not sought to be minimized but to feedback for pole assignment for the active control of vibro-acoustic response. Numerical results show that the chosen poles may be assigned to predetermined values by the active control with complex gains.