摘要
分析了常规有限元方法在智能结构振动主动控制中的局限性,介绍了刚性有限元的基本理论和梁结构的刚性有限元方程的建立。采用运动参考系方法,结合Kane方程推导出了运动弹性结构的刚性有限元动力方程以及闭环控制方程。采用了分段线性化的思想对运动弹性结构振动实施主动控制。对附着在运动的中心刚体上的压电柔性结构的振动主动控制进行了计算机模拟,得到了很好的结果。
The limitations of classic Finite Element Method are discussed first in this paper.The rigid finite element method is introduced simply and the equation of beams is establised by using rigid finite element.By using rigid finite elements to disperse the elastic body,based on Kane’s equation,The dynamic equation of a moving elastic body and the control ing equation are devel-oped.By using local linear ideal,The active vibration control was applied to a moving elastic body.The simulation of the active vibration control of a piezoelectric elastic structure attached to a moving rigid body has been done,the result is very good.
出处
《机床与液压》
北大核心
2013年第18期83-87,共5页
Machine Tool & Hydraulics
基金
Substantially Supported by the Fund of Traction Power National Laboratory(TPL1108)
关键词
运动结构
柔性梁
振动主动控制
刚性有限元法
moving structure
elastic beam
active vibration control
The rigid finite element method
