公开(公告)号：WO2021255469A1

公开(公告)日：2021-12-23

申请号：PCT/GB2021/051549

申请日：2021-06-17

Applicant: CAMBRIDGE MECHATRONICS LIMITED

Inventor： BROWN, Andrew Benjamin Simpson ,  HOWARTH, James ,  LANGHORNE, Robert ,  KIST, René

IPC: F03G7/06 ,  G02B7/00 ,  G02B7/02 ,  G02B7/04 ,  G03B3/10 ,  G03B5/00 ,  F03G7/06143 ,  F03G7/067 ,  G02B7/08 ,  G03B2205/0007 ,  G03B2205/0046 ,  G03B2205/0076 ,  G03B30/00

Abstract: A shape memory alloy (SMA) actuator comprising: a support structure (10); a moveable part (20) movable relative to the support structure; plural SMA components (30) connecting the support structure and the movable part, the SMA components are operable to controllably change the position and/or orientation of the moveable part in two or more degrees of freedom; a controller (12) for controlling the operation of the SMA components in a first operating mode during normal operation and a second operating mode in response to an event; and means configured to, during the second operating mode, maintain at least partial control of the moveable part with a subset of the plural SMA components.

公开(公告)号：WO2022208066A1

公开(公告)日：2022-10-06

申请号：PCT/GB2022/050775

申请日：2022-03-29

Applicant: CAMBRIDGE MECHATRONICS LIMITED

Inventor： HEIJNE, Nicolas ,  BROWN, Andrew Benjamin Simpson ,  HOWARTH, James ,  SOUTH, Adam

IPC: F03G7/06 ,  G02B7/02 ,  G03B3/10 ,  F03G7/06143 ,  F03G7/067 ,  G02B27/646 ,  G03B13/36 ,  G03B15/05 ,  G03B2205/0007 ,  G03B2205/0046 ,  G03B2205/0076

Abstract: A shape memory alloy (SMA) actuator assembly (1) comprising: a movable part (100); a support structure (3); one or more SMA wires arranged, on contraction, to tilt the movable part relative to the support structure about two orthogonal axes that are perpendicular to a primary axis (O) of the support structure; and axial translation constrainers (16) configured to limit axial translation of the movable part relative to the support structure along the primary axis of the support structure, wherein the axial translation constrainers are arranged to prevent all points of the movable part from simultaneously reaching their most extreme position along the primary axis of the support structure allowed by the range of possible tilt of the movable part relative to the support structure.