复杂结构振动控制设计与仿真方法研究

Vibration control design and simulation method for complex structures

为了避免在建立结构数学模型过程中因简化和降阶引起的模型误差,解决复杂结构建模难的问题,提高控制器设计的准确性,提出了一种新的基于有限元法(FEM)的结构振动控制设计方法.该方法可借助于商用结构有限元分析软件来实现,简便易行,在PAT-RAN/NASTRAN环境中利用PATRAN命令语言PCL(Patran Command Language)建立了通用结构控制仿真平台.通过对压电自适应桁架结构的振动控制进行控制设计仿真和实验验证,证明了新方法的有效性;与Simulink使用简化模型的仿真结果相比,新方法的结果与实验结果更为接近,表明其准确性更高.该方法适用于对处在设计阶段的复杂结构进行控制设计与仿真评估.

A new vibration control design method based on FEM （finite element method） was proposed for structures to avoid the model error due to simplification and model reduction, in order to solve the difficulty of complex structures modeling and to improve the accuracy of the control design. The method could be implemented easily with the help of commercial FEM analysis softwares. A universal control simulation interface was established in structure analysis package PATRAN/NASTRAN environment with the programmable PCL （patran command language）. The effectiveness of the method was demonstrated through the PCL simulation and experimental validation of the vibration control of a piezoelectric adaptive truss structure. The numerical result of the new technology agrees better with the experimental data when compared with Simulink simulation using simplified model. The new FEM method is proved to be more accurate and suitable for the control design simulation and evaluation of complex structures in design stage.