AMD结构主动控制系统的建模研究

RESEARCH ON MODELING OF STRUCTURAL CONTROL SYSTEM WITH ACTIVE MASS DAMPER

为了给主动质量阻尼(Active Mass Driver,AMD)系统的控制策略研究提供一个精确的数学模型,采用了Ansys有限元分析方法和系统辨识的方法分别对AMD受控结构系统进行了建模。通过对比和分析两种方法得到的数学模型,最终选择了将所有的结构子系统,包括传感器和作动器等作为一个整体进行处理的系统辨识方法得到的模型作为控制系统设计模型。

For providing an accurate mathematical model to control strategy research of the AMD benchmark system, finite element method and system identification method are respectively applied. Having compared the two kinds of methods, the identification model is finally chosen as control-oriented model, which can regard all the sub-structure systems including sensors and actuator as a whole to be dealt with. To obtain control-oriented transfer matrix of structural system, least square fitting technique and balanced truncation procedure are applied in the system identification process modal information as a consequence of finite element analysis indirectly proves that the results of system identification are correct.