合成阻抗在振动噪声控制中的应用  

Application of synthetic impedance in vibration and noise control

作　　者：刘汝寿[1] 季宏丽[1] 裘进浩[1] 朱孔军[1] 马小陆[1] 

机构地区：[1]南京航空航天大学智能材料与结构航空科技重点实验室,江苏南京210016

出　　处：《传感器与微系统》2010年第2期114-116,120,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(50775110);江苏省博士学位论文创优基金资助项目(CX08B_048Z)

摘　　要：用改进的DSP合成阻抗电路替代传统的压电分流阻尼电路进行振动噪声控制。详细分析了该DSP合成阻抗电路的工作原理和实现方法。在一个声学圆管上进行了并联DSP合成阻抗的压电阻尼的减振降噪实验,给出了单模态被动减振和降噪的实验结果,并将其结果与传统阻尼电路进行比较。实验结果表明:这种被动控制系统能获得更好的振动控制效果。The improved digital signal processor DSP circuit of synthetic impedance is adopted instead of traditional piezoelectric shunting damping circuit in vibration control. The principle and implementation of the DSP circuit of synthetic impedance are analyzed in detail. The shock absorption and noise reduction by piezoelectric damping with the DSP circuit of synthetic impedance is tested in an acoustic tunnel, and the single mode result of vibration damping is given and compared with that of traditional piezoelectric shunting damping circuits. The experimental result shows that this passive control scheme can achieve much better performance in vibration control. The further study on the development of the multiple mode and adaptive passive vibration control with DSP circuit of synthetic impedance is proposed.

关 键 词：压电元件 数字信号处理器 合成阻抗 振动噪声控制 

分 类 号：O327[理学—一般力学与力学基础] TB123[理学—力学]