摘要
The vibration control in the frequency domain is significant.Therefore,an active vibration control in frequency domain is studied in this paper.It is generally known that piezo-intelligent structures possess satisfactory performances in the area of vibration control,and macro-fiber composites(MFCs)with high sensitivity and deformability are widely applied in engineering.So,this paper uses the MFC patches and designs a control method based on the pole placement method,and the natural frequency of the beam can be artificially designed.MFC patches are bonded on the top and bottom surfaces of the beam structure to act as the actuators and sensors.Then,the finite element method(FEM)is used to formulate the equation of motion,and the pole placement based on the out-put feedback method is used to design the active controller.Finally,the effectiveness of the active control method is verified.
基于频域的振动控制对于结构动力学十分重要,因此本文研究了一种基于极点配置法的频域振动主动控制理论。由于压电智能结构在振动控制领域具有令人满意的性能,并且宏观纤维复合材料(Macro-fiber composite,MFC)具有高灵敏度和可变形性,本文使用MFC片并基于极点配置法设计控制方法,可以人为地设计梁的固有频率。研究中MFC片被粘结在梁结构的顶面和底面分别作为作动器和传感器。然后采用有限元法建立了智能结构运动方程,并基于输出反馈的极点配置法设计了主动控制器。最后通过实验和仿真验证了本文主动控制方法的有效性。
基金
supported by the National Natural Science Foundation of China(Nos.11802069,11761131006)
the China Postdoctoral Science Foundation(No.3236310534)
the Heilongjiang Provincial Postdoctoral Science Foundation(Nos.002020830603,LBHTZ2008)
the China Fundamental Research Funds for the Central Universities(No.GK2020260225).
