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首页> 外文期刊>Mechanical systems and signal processing >A new design of unsymmetrical shunt circuit with negative capacitance for enhanced vibration control
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A new design of unsymmetrical shunt circuit with negative capacitance for enhanced vibration control

机译：增强振动控制具有负电容的非对称分流电路的新设计

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摘要

Piezoelectric elements are widely used in structural vibration suppression. The applicable bipolar voltage of a piezoelectric element is unsymmetrical, but in most control systems, the voltage on the piezoelectric actuator is applied symmetrically, which greatly wastes the driving capability. In synchronized switching damping (SSD) approaches for structural vibration control, the damping effect depends on the effective voltage range on the piezoelectric actuator. A novel method of realizing unsymmetrical bipolar voltage with SSD method based on negative capacitance shunt circuit for vibration control is proposed for improvement of the control performance in this study. A resistance and a diode that added into constructed negative capacitance circuit are used to realize unsymmetrical bipolar voltage. The general expression of the switched voltage on the piezoelectric actuator is derived. The stability of negative capacitance shunt circuit is addressed. The added offset resistance in the negative capacitance circuit plays an important role in system stability. The simulation analysis results agree very well with the theoretical results, both of which reveal that the unsymmetrical voltage ratio depends on the resistance in the negative capacitance circuit. Finally, experiments are carried out to verify the designed circuit and the excellent damping performance.
机译：压电元件广泛用于结构振动抑制。压电元件的适用双极电压是非对称的，但在大多数控制系统中，压电致动器上的电压对称地应用，这极大地浪费了驱动能力。在同步开关阻尼（SSD）接近结构振动控制的方法中，阻尼效果取决于压电致动器的有效电压范围。提出了一种利用基于负电容分流电路实现振动控制的SSD法实现非对称双极电压的新方法，用于提高该研究的控制性能。添加到构造的负电容电路中的电阻和二极管用于实现非对称双极电压。推导出压电致动器上的开关电压的一般表达。处理负电容分流电路的稳定性。负电容电路中的额外偏移电阻在系统稳定性中起重要作用。仿真分析结果与理论结果非常吻合，这两者都揭示了非对称电压比取决于负电容电路中的电阻。最后，进行实验以验证设计的电路和出色的阻尼性能。

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  • 来源
    《Mechanical systems and signal processing》 |2021年第6期|107576.1-107576.14|共14页
  • 作者

    Hongli Ji; Yufei Guo; Jinhao Qiu; Yipeng Wu; Chao Zhang; Chongcong Tao;

  • 作者单位

    State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics & Astronautics Yudao Street 29 Nanjing 210016 China;

    State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics & Astronautics Yudao Street 29 Nanjing 210016 China;

    State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics & Astronautics Yudao Street 29 Nanjing 210016 China;

    State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics & Astronautics Yudao Street 29 Nanjing 210016 China;

    State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics & Astronautics Yudao Street 29 Nanjing 210016 China;

    State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics & Astronautics Yudao Street 29 Nanjing 210016 China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Negative capacitance; Synchronized switching damping; Piezoelectric element; Semi-active vibration control;

    机译：负电容;同步开关阻尼;压电元件;半主动振动控制;

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