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首页> 外文期刊>International journal of applied mechanics >Active Vibration Control for a Large Annular Flexible Structure via a Macro-Fiber Composite Strain Sensor and Voice Coil Actuator
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Active Vibration Control for a Large Annular Flexible Structure via a Macro-Fiber Composite Strain Sensor and Voice Coil Actuator

机译：通过宏观纤维复合应变传感器和音圈驱动器对大型环形柔性结构进行主动振动控制

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摘要

Large annular flexible structures (LAFS) are typical antenna structures for satellites. This structure can significantly increase antenna aperture and effectively improve communication accuracy with minimum addition of mass. LAFS have become mainstream for large aperture antenna structures. However, they have disadvantages, such as low natural frequencies, low damping ratio, and low stiffness. They easily suffer from low frequency, longtime and modal responses. Therefore, the vibration control of LAFS is very important. This study proposes a novel active vibration control method using macrofiber composite (MFC) as a sensing unit, a voice coil actuator and a PD-fuzzy control algorithm. The MFC sensor can measure a minimum strain of 10(-8) m/m. The voice coil actuator generates a displacement and driving force. Based on the feedback signal from the MFC sensor, the PD-fuzzy control algorithm controls the voice coil actuator. A dynamic model of LAFS was established, and its characteristics analyzed. A theoretical model for the voice coil actuator and MFC sensor were established, and the corresponding governing equations derived. An experimental system was set up. The results demonstrated that the novel active vibration control method has good performance. This active vibration control method can control vibration at ultralow frequencies and requires no additional stiffness.
机译：大型环形挠性结构（LAFS）是卫星的典型天线结构。这种结构可以以最小的质量增加来显着增加天线孔径并有效地提高通信精度。 LAFS已成为大孔径天线结构的主流。但是，它们具有诸如固有频率低，阻尼比低和刚度低的缺点。他们容易遭受低频，长时间和模态响应的困扰。因此，LAFS的振动控制非常重要。这项研究提出了一种新的主​​动振动控制方法，该方法使用大纤维复合材料（MFC）作为传感单元，音圈致动器和PD模糊控制算法。 MFC传感器可测量的最小应变为10（-8）m / m。音圈致动器产生位移和驱动力。基于MFC传感器的反馈信号，PD模糊控制算法控制音圈致动器。建立了LAFS的动态模型，并对其特性进行了分析。建立了音圈致动器和MFC传感器的理论模型，并推导了相应的控制方程。建立了实验系统。结果表明，该新型主动振动控制方法具有良好的性能。这种主动的振动控制方法可以控制超低频振动，并且不需要额外的刚度。

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