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    • 3. 发明授权
    • Method for producing a composite structure including a piezoelectric
element
    • 一种制造包括压电元件的复合结构体的方法
    • US06162313A
    • 2000-12-19
    • US120588
    • 1998-07-22
    • Horst BansemirStefan Emmerling
    • Horst BansemirStefan Emmerling
    • B64C27/46B32B5/22B64C27/473B64C27/68H01L41/09H01L41/313H02N2/02B32B31/16
    • H01L41/313B64C2027/7283Y02T50/34
    • A composite structure (3) includes a piezoelectric element (1) sandwiched between fiber composite panels (2). The composite structure can be used as an actuator element. In a method for producing the composite structure, the fiber composite panels are pre-stressed and pre-strained by applying respective pre-stressing forces (F.sub.1, F.sub.2) in opposite directions along two substantially perpendicular axes in the plane of the panel. The pre-stressed and pre-strained condition of the fiber composite panels (2) is maintained, while the panels are adhesively bonded (5) surfacially onto the piezoelectric element (1). After the bonding is completed, the pre-stressing forces are removed from the fiber composite panels. As a result, in the finished composite structure (3), the fiber composite panels (2) are under internal tension, while the piezoelectric element (1) is under internal compression. The pre-stressing forces (F.sub.1, F.sub.2) are particularly selected in magnitude and direction to achieve the required resultant balance of tension and compression within the composite structure (3). The pre-compression of the piezoelectric element (1) should be sufficient so that operating loads on the composite structure do not result in tension loading of the piezoceramic element, while substantially maintaining the useful active strain range of the overall composite structure.
    • 复合结构(3)包括夹在纤维复合板(2)之间的压电元件(1)。 复合结构可用作致动器元件。 在复合结构的制造方法中,通过在面板的平面中沿两个基本垂直的轴线沿相反的方向施加各自的预应力(F1,F2),预应力和预应变纤维复合板。 保持纤维复合板(2)的预应力和预应变条件,同时将面板(5)表面粘合(5)粘合到压电元件(1)上。 在粘结完成之后,从纤维复合板中去除预应力。 结果,在成品复合结构(3)中,纤维复合板(2)处于内部张力下,而压电元件(1)处于内部压缩状态。 预应力(F1,F2)在大小和方向上特别选择,以实现复合结构(3)内所需的张力和压缩平衡。 压电元件(1)的预压缩应该是足够的,使得复合结构上的操作负载不会导致压电陶瓷元件的张力负载,同时基本上保持整个复合结构的有用的有效应变范围。
    • 5. 发明授权
    • Rod-shaped high-stress active connection element as well as rotorcraft having such a connection element
    • 杆状高应力主动连接元件以及具有这种连接元件的旋翼航空器
    • US07247974B2
    • 2007-07-24
    • US11009479
    • 2004-12-13
    • Horst BansemirStefan Emmerling
    • Horst BansemirStefan Emmerling
    • H01L41/08
    • F16F15/005B64C27/001B64C2027/002F16F2230/16H01L41/053H01L41/0536
    • Active connection element for connecting at least two structural components with a first end with a first connection area assigned to the first structural component and a second end with a second connection area assigned to the second structural component, a load-diminishing intermediate section through which intermediate section the flux of force between the first and second connection areas extends when the connection element is loaded, in which at least one controllable extension actuator having at least a piezo stack is arranged parallel to the intermediate section. When operated, the piezo stack extends the connection element at least in the area of the intermediate section in a controlled manner in order to actively suppress or insulate vibrations between the structural components. A prestressing device having a prestressing element exercises a compressive prestressing onto the piezo stack.
    • 主动连接元件,用于将至少两个结构部件与第一端连接,第一连接区域分配给第一结构部件,第二端部具有分配给第二结构部件的第二连接区域,负载递减中间部分,中间部件 当连接元件被加载时,第一和第二连接区域之间的力通量延伸,其中至少一个具有至少压电叠层的可控延伸致动器平行于中间部分布置。 当操作时,压电叠层至少在中间部分的区域中以可控的方式延伸连接元件,以便主动地抑制或隔离结构部件之间的振动。 具有预应力元件的预应力装置对压电叠层进行压缩预应力。