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    Dielectric elastomer actuator
    31.
    发明授权
    Dielectric elastomer actuator 有权

    公开(公告)号：US10170682B2

    公开(公告)日：2019-01-01

    申请号：US15061575

    申请日：2016-03-04

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  The Regents of the University of Michigan

    Inventor： Paul W. Alexander ,  Nancy L. Johnson ,  Tizoc Cruz Gonzalez ,  Jonathan E. Luntz ,  Diann Brei

    IPC: H01L41/047 ,  H01L41/053 ,  H01L41/09 ,  H01L41/25 ,  H01L41/04

    Abstract: A dielectric elastomer actuator includes an elastomeric film and an electrode material layer on opposing sides of the film. The elastomeric film includes a first section, a second section, and a transition section disposed between the first section and the second section. The electrode material layers are disposed on the transition section and the first and second sections. The first and second sections are restrained in a pre-stretched configuration in an axial and a lateral direction, while the transition section is not restrained in the axial direction. The transition section elongates in response to the application of a voltage to the electrode material layers, such that the first and second sections move apart, in the axial direction. Likewise, the transition section is configured to contract in an absence of a voltage applied to the electrode material layers, such that the first and second sections move apart, in the axial direction.

    System with damper-controlled switch for shape memory alloy actuator motion control
    36.
    发明授权
    System with damper-controlled switch for shape memory alloy actuator motion control 有权
    具有阻尼控制开关的系统，用于形状记忆合金致动器运动控制

    公开(公告)号：US09394888B2

    公开(公告)日：2016-07-19

    申请号：US14632583

    申请日：2015-02-26

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  The Regents of the University of Michigan

    Inventor： Paul W. Alexander ,  Nancy L. Johnson ,  Jonathan E. Luntz ,  Diann Brei ,  Clover Thebolt ,  Brent Utter

    IPC: H02K7/10 ,  F03G7/06

    CPC classification number: F03G7/065

    Abstract: A system for controlling motion of a shape memory alloy (SMA) actuator includes a damper operatively connectable to the SMA actuator and having a movable portion that moves with the SMA actuator when the SMA actuator contracts during electrical activation. An electronic switch is operatively connectable to the SMA actuator and to the damper. The electronic switch has an open position preventing electrical power flow to the SMA actuator, and a closed position permitting electrical power flow to the SMA actuator. A biasing element applies a biasing force that urges the electronic switch to the closed position. The damper overcomes the biasing element to move the switch to the open position only when velocity of the movable portion equals or exceeds a predetermined threshold velocity, and to return to the closed position when the velocity of the movable portion falls below the predetermined threshold velocity.

    Abstract translation: 用于控制形状记忆合金（SMA）致动器的运动的系统包括可操作地连接到SMA致动器并且当SMA致动器在电激活期间收缩时与SMA致动器一起移动的可动部分的阻尼器。 电子开关可操作地连接到SMA致动器和阻尼器。 电子开关具有防止电力流向SMA致动器的打开位置，以及允许电力流向SMA致动器的关闭位置。 偏置元件施加将电子开关推向关闭位置的偏压力。 仅当可移动部分的速度等于或超过预定阈值速度时，阻尼器克服偏置元件才将开关移动到打开位置，并且当可移动部分的速度降到预定阈值速度以下时返回到关闭位置。

    Joining or fastening components containing a shape memory polymer
    37.
    发明授权
    Joining or fastening components containing a shape memory polymer 有权
    连接或紧固包含形状记忆聚合物的组件

    公开(公告)号：US08864403B2

    公开(公告)日：2014-10-21

    申请号：US13859003

    申请日：2013-04-09

    Applicant: GM Global Technology Operations LLC

    Inventor： Nilesh D. Mankame ,  Paul W. Alexander ,  Alan L. Browne ,  Nancy L. Johnson ,  Xiujie Gao

    IPC: F01D15/02 ,  B23P11/02 ,  F16B17/00 ,  F16B1/00

    CPC classification number: F16B17/00 ,  B29C65/66 ,  B29C65/76 ,  B29C66/54 ,  B29C66/73715 ,  F16B1/0014 ,  Y10T29/49865 ,  Y10T29/49908 ,  Y10T403/21

    Abstract: A releasable connection connects a first component to a second component. The second component includes and is manufactured from a Shape Memory Polymer (SMP), and defines a pocket. The first component includes a portion disposed within the pocket. The pocket is deformed from an initial shape permitting insertion of the portion into the pocket to assembly the releasable connection into a connected shape wherein the pocket is deformed to secure the first component relative to the second component. The pocket is transformed from the initial shape into the connected shape by heating the SMP material of the second component to a switching temperature. Re-heating the SMP second component to the switching temperature returns the pocket back to the initial shape from the connected shape to disassembly the releasable connection.

    Abstract translation: 可释放的连接将第一部件连接到第二部件。 第二组件包括并由形状记忆聚合物（SMP）制成，并且定义了一个口袋。 第一部件包括设置在口袋内的部分。 口袋从初始形状变形，允许将该部分插入口袋中以将可释放连接件组装成连接形状，其中口袋变形以相对于第二部件固定第一部件。 通过将第二组分的SMP材料加热到开关温度，将口袋从初始形状转变为连接形状。 将SMP第二部件重新加热至开关温度，将口袋从连接形状返回到初始形状，以拆卸可拆卸连接。

    SYSTEM AND METHOD FOR CONTROLLING AN ACTIVE MATERIAL ACTUATOR
    38.
    发明申请
    SYSTEM AND METHOD FOR CONTROLLING AN ACTIVE MATERIAL ACTUATOR 有权
    用于控制活性材料致动器的系统和方法

    公开(公告)号：US20140306624A1

    公开(公告)日：2014-10-16

    申请号：US14226875

    申请日：2014-03-27

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Chandra S. Namuduri ,  Lei Hao ,  Paul W. Alexander ,  Xiujie Gao

    IPC: H02P31/00 ,  H01L41/04 ,  F03G7/06

    CPC classification number: F03G7/065 ,  H02N2/0075

    Abstract: A system for controlling an active material actuator includes an active material actuator configured to actuate when energized, a power supply configured to supply electrical power, and a control circuitry including a plurality of circuits and configured to selectively establish an electrical connection between the active material actuator and the power supply upon receipt of an activation signal. The control circuitry is configured to de-energize at least one of the circuits when no activation signal is received by the control circuitry in order to minimize parasitic current drawn from the power supply.

    Abstract translation: 用于控制活性材料致动器的系统包括被配置为在被激励时致动的活性材料致动器，被配置为提供电力的电源，以及包括多个电路的控制电路，并且被配置为选择性地建立所述活性材料致动器 以及在接收到激活信号时的电源。 控制电路被配置为当控制电路没有接收到激活信号时，使至少一个电路断电，以便最小化从电源吸取的寄生电流。

    Cushion member having variable stiffness
    40.
    发明授权
    Cushion member having variable stiffness 有权

    公开(公告)号：US12115891B2

    公开(公告)日：2024-10-15

    申请号：US18058501

    申请日：2022-11-23

    Applicant: GM Global Technology Operations LLC

    Inventor： Nilesh D. Mankame ,  Wonhee M. Kim ,  Paul W. Alexander

    IPC: B60N2/72

    CPC classification number: B60N2/72

    Abstract: A cushion member having improved variable stiffness for a target is provided. The cushion member comprises a cushion housing having an interior with a variable internal pressure and an exterior surface for receiving the target. The cushion housing is arranged to be deformable and comprises granular particles disposed in the interior of the cushion housing. The cushion housing further comprises hollow particles disposed therein with the granular particles. Each hollow particle is compressible and hollow to define a void therein. The hollow particles have a size, a wall thickness, a material, and a bulk modulus defining infill properties thereof. The hollow particles and the granular particles are arranged to allow the cushion housing to be deformed upon contact with the target. The hollow particles and granular particles define a cushion infill having a variable stiffness based on the infill properties and the variable internal pressure of the interior.

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