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    • 4. 发明公开
    • DEFORMABLE STRUCTURAL ARRANGEMENT
    • 可变形的结构布置
    • EP0830244A1
    • 1998-03-25
    • EP96914815.0
    • 1996-05-17
    • McGILL UNIVERSITY
    • HAYWARD, VincentGRANT, Danny
    • B25J9B25J18F03G7F16F15
    • B25J9/1085B25J18/06F03G7/065F16F15/005F16F2224/0258
    • An actuator (10) develops a displacement from a force; the actuator employs active tension elements (20) which comprise a fiber or fibers which shorten under activation, for example, shape memory alloy fibers; the fiber or fibers are entrained between opposed, spaced apart support members (12, 26), typically a stack of spaced apart disks; the entrained fiber or fibers define a cage of crossing lengths of fiber in symmetrical array, typically a helicoidal array. Activation of the fibers shortens the fiber lengths producing a relative displacement of the support members which can be translated to a component which is to be displaced, and to which the actuator is operably connected, in another embodiment the active tension elements stretch under stress so that instead of an actuator there is formed a shock absorber which eliminates displacement with a force.
    • 致动器(10)从力产生位移; 该致动器采用主动张紧元件(20),该主动张紧元件(20)包括在激活时缩短的一个或多个纤维,例如形状记忆合金纤维; 纤维或纤维被夹带在相对的,间隔开的支撑构件(12,26)之间,典型地是间隔开的盘的堆叠; 夹带的纤维或纤维限定了对称阵列中通常为螺旋阵列的交叉长度的纤维笼。 纤维的激活缩短了纤维长度,从而产生支撑构件的相对位移,该支撑构件可以被平移到待移位的部件上,并且致动器可操作地连接到该部件上。在另一个实施例中,主动拉伸元件在应力下拉伸, 代替致动器,形成了消除力的位移的减震器。