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piezoelectric induced strain actuator
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    Piezoelectric Induced Strain Actuator and Its Application in Structures
    压电固体作动筒及其在结构中的应用
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Actuators are very important parts in modern self adaptive and intelligent control systems. Its property will greatly affect the system. Since traditional actuators have some insolvable difficulties for modern applications. The solid actuators have become a hot spot in research fields. In recent years, the PZT have attracted great attention for its application as actuators and sensors, but its many applications are based on small displacement control. For applications of large displacement actuators in structures,...

Actuators are very important parts in modern self adaptive and intelligent control systems. Its property will greatly affect the system. Since traditional actuators have some insolvable difficulties for modern applications. The solid actuators have become a hot spot in research fields. In recent years, the PZT have attracted great attention for its application as actuators and sensors, but its many applications are based on small displacement control. For applications of large displacement actuators in structures, a detailed investigation of large displacement solid PZT actuators is provided. Actuator model of the piezoelectric induced strain actuator (PZT ISA) and the matching property between the PZT ISA and the structure is studied. An optimized model of the PZT ISA and the structure is proposed, through which the maximum actuator force and the maximum induced strain can be obtained. This work provides a fundamental theoretical research for the application of the PZT ISA. At the end, a model of the stack driven helicopter servo flap and its mechanical amplifier are studied and discussed, which is used to replace the hydraulic actuator for the servo flap. At the same time, the actuator properties under different loads and different frequencies are surveyed. The results reveal that the PZT ISA could satisfy the need of the driven properties for active servo flap control.

建立了大位移压电固体作动筒(Piezoelectric induced strain actuator, PZT ISA)的动力学模型。探讨了压电固体作动筒在结构应用中的力学驱动模型,研究了压电作动筒和结构之间的驱动传递关系,以及在结构应用中获得最大输出位移和最大作用力的匹配关系;研究了利用压电作动筒驱动直升机伺服襟翼的一种初步构想以及机械放大机构,用于替代现有的液压装置,对旋翼进行主动减震降噪。同时在不同的频率及负载下,对压电作动筒的驱动性能进行了实验,并作了讨论。结论表明:利用压电作动筒作为直升机伺服襟翼控制的驱动器件,可以实现对伺服襟翼的主动变形及振动控制。

 
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