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    MODEL BASED CONTROL OF SHAPE MEMORY ALLOY DEVICE
    1.
    发明申请
    MODEL BASED CONTROL OF SHAPE MEMORY ALLOY DEVICE 审中-公开
    形状记忆合金装置的模型控制

    公开(公告)号：US20120065744A1

    公开(公告)日：2012-03-15

    申请号：US12878265

    申请日：2010-09-09

    申请人： Ravindra Brammajyosula ,  Vidyashankar R. Buravalla ,  Ashish Khandelwal

    发明人： Ravindra Brammajyosula ,  Vidyashankar R. Buravalla ,  Ashish Khandelwal

    IPC分类号： G05B13/02 ,  G06G7/48 ,  G06F17/10

    CPC分类号： F03G7/065

    摘要： A method of modeling a Shape Memory Alloy (SMA) element to predict a response of the SMA element includes obtaining the resistivity of the SMA element over a range of a physical property of the SMA element; correlating variations in the obtained resistivity with respect to the physical property of the SMA element to identify behavioral differences in the resistivity for the different phases of the SMA element; calculating a rate of change of the resistivity of the SMA element over a period of time; calculating the derivative of the rate of change in the resistivity of the SMA element over the period of time; and comparing real time data of the physical property to the derivative of the rate of change to predict the response of the shape memory alloy element.

    摘要翻译： 对形状记忆合金（SMA）元件建模以预测SMA元件的响应的方法包括在SMA元件的物理性质的范围内获得SMA元件的电阻率; 将获得的电阻率相对于SMA元件的物理性质的变化相关联，以识别SMA元件的不同相的电阻率的行为差异; 计算SMA元件在一段时间内的电阻率变化率; 计算SMA元素在一段时间内的电阻率变化率的导数; 并将物理特性的实时数据与变化率的导数进行比较，以预测形状记忆合金元素的响应。

    TUNABLE STIFFNESS ACTUATOR
    2.
    发明申请
    TUNABLE STIFFNESS ACTUATOR 审中-公开
    可调节致动器

    公开(公告)号：US20130014501A1

    公开(公告)日：2013-01-17

    申请号：US13471784

    申请日：2012-05-15

    申请人： Ravindra Brammajyosula ,  Vidyashankar R. Buravalla

    发明人： Ravindra Brammajyosula ,  Vidyashankar R. Buravalla

    IPC分类号： F03G7/06

    CPC分类号： F03G7/06

    摘要： An actuator configured for tunable stiffness control and method is provided. The actuator includes a plurality of stiffness elements, one or more of the stiffness elements including a shape memory alloy (SMA). At least one of the elements has a stiffness characteristic different from another of the stiffness elements. The stiffness elements are actuable individually or in combination to provide an intermediate actuation output, which may be provided by partially transforming the smart material of one or more stiffness elements during actuation. Two or more of the stiffness elements may be actuable in combination to provide a combined output which may be non-linear, or may be functionally substitutional for an individual output of another stiffness element. The actuator may be actuable to provide a first and second output for the substantially same input, or may be selectively actuable to offset degradation of one or more of the stiffness elements.

    摘要翻译： 提供了一种可调谐刚度控制器和方法的致动器。 致动器包括多个刚度元件，一个或多个刚度元件包括形状记忆合金（SMA）。 至少一个元件具有与另一个刚度元件不同的刚度特性。 刚度元件可以单独致动或组合起来以提供中间致动输出，其可以通过在致动期间部分地转换一个或多个刚度元件的智能材料来提供。 两个或更多个刚度元件可以组合起来以提供可以是非线性的组合输出，或者可以在功能上替代另一个刚度元件的单独输出。 致动器可以是致动的，以为基本相同的输入提供第一和第二输出，或者可以选择性地致动以抵消一个或多个刚度元件的劣化。