基于压电元件的被动振动控制的优化设计与实现

【作者】 刘莹；

【导师】 卜雄洙；

【作者基本信息】 南京理工大学 ， 测试计量技术及仪器， 2006， 硕士

【摘要】 本文研究了基于压电元件的被动振动控制方法。通过以根部粘贴有压电陶瓷片的悬臂梁系统为例，对被动振动控制进行了详细的理论分析和大量的实验研究。文中首先根据压电元件的特性，采用极点配置法，确定了减振电路中的参数最优值，并采用了模拟电感技术解决了电路参数中大电感值的问题。之后，对压电分流阻尼电路进行了单模态和多模态减振的实验研究，并获得了较好的单模态减振实验效果。而在多模态减振时，压电分流阻尼电路存在体积大、参数难以调谐等缺点，以至不易达到最佳的实验效果。为了更好的实现多模态减振，本文采用了一种新型的减振电路——利用DSP构建“合成阻抗(synthetic impedance)”电路来代替传统的压电分流阻尼电路。并通过对DSP减振电路的实验研究，论证了DSP减振电路在单模态和多模态减振时，都较之压电分流阻尼电路具有更好的减振效果，尤其是在多模态减振时，DSP减振电路的优势更加明显。最后，对同步开关减振技术进行了理论分析，并利用DSP进行了初步实验研究和探讨。更多还原

【Abstract】 In this paper, the techniques of passive vibration control based on piezoelectric ceramic are studied. A particular analysis of the theory and a lot of experiments are designed and implemented for a simply supported cantilever beam. Firstly, according to the characteristics of piezoceramics, the optimal values of electric component are determined. Because of the high value of inductors, the simulated inductor circuits are adopted. Then, the shunt damping circuit, is studied on both single mode and multimode vibration damping. When multimode vibration damping of shunt damping ciruit is done, not only the cubage of the circuit is large, but also the parameters of the circuit are not easy to tune. So it is not easy to get. the optimal result. In order to get better result of multimode vibration damping, a new approach is introduced in this paper. A synthetic impedance, consisting of a voltage controlled current source DSP system, is used to synthesize the terminal impedance of a shunt network. And also by experiment, the better vibration damping result is proved, especially when it is applied on the multimode vibration damping. At last, another passive damping method, SSD(Synchronized Switch Damping), is preliminarily discussed on both theory and experimentation.更多还原