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1. 发明申请

WO2017212262A1 CENTRING CONTROL OF AN SMA ACTUATION ASSEMBLY 审中-公开
标题翻译：一个SMA促动组件的中心控制
公开(公告)号：WO2017212262A1
公开(公告)日：2017-12-14
申请号：PCT/GB2017/051651
申请日：2017-06-07
申请人： CAMBRIDGE MECHATRONICS LIMITED
发明人： BROWN, Andrew Benjamin David , BURBRIDGE, Daniel John , GRAYLEY, John , GOTLIBOVYCH, Igor , GREGORY, Thomas Matthew
IPC分类号： F03G7/06 , G03B3/02 , H04N5/225
摘要： An SMA actuation assembly comprising SMA actuator wires connected in tension between a support structure and a movable element is controlled to drive movement of the movable element with respect to the support structure by supplying drive signals to the SMA actuator wire. Target signals representing desired positions of the movable element are set, varying within a predetermined spatial envelope. Measures of resistance of the SMA actuator wires are derived and the power of the drive signals is controlled under closed loop control on the basis of the target signals and feedback signals obtained from the measures of resistance. Electrical characteristics of the SMA actuator wires are monitored and used to detect when a motion limit of the movement is reached. In response thereto, the spatial envelope is adjusted to restrict the movement to be within the detected motion limit.
摘要翻译：控制SMA致动组件，该SMA致动组件包括在支撑结构与可移动元件之间张紧连接的SMA致动器线，以通过向SMA致动器供应驱动信号来驱动可移动元件相对于支撑结构的移动线。表示可移动元件的期望位置的目标信号被设定，在预定的空间包络内变化。导出SMA执行器导线的电阻测量值，并根据从电阻测量值获得的目标信号和反馈信号，在闭环控制下控制驱动信号的功率。监控SMA执行器电线的电气特性，并用于检测运动的运动极限何时达到。响应于此，调整空间包络以将移动限制在检测到的运动限制内。

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