发明申请
- 专利标题: METHOD FOR OVERLOAD PROTECTION OF SMA DEVICE
- 专利标题(中): SMA器件过载保护方法
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申请号: US12797911申请日: 2010-06-10
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公开(公告)号: US20100332151A1公开(公告)日: 2010-12-30
- 发明人: Lei Hao , Xiujie Gao , Sanjeev M. Naik
- 申请人: Lei Hao , Xiujie Gao , Sanjeev M. Naik
- 申请人地址: US MI DETROIT
- 专利权人: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
- 当前专利权人: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
- 当前专利权人地址: US MI DETROIT
- 主分类号: G01L1/00
- IPC分类号: G01L1/00 ; G06F19/00
摘要:
A method for detecting a mechanical overload condition of an energized linear actuator to prevent commanding an activation signal to the linear actuator that may mechanically overload the linear actuator includes monitoring feedback variation of a movable element associated with the linear actuator including monitoring a present feedback signal of the movable element, monitoring a previous feedback signal of the movable element, comparing the present feedback signal and the previous feedback signal and determining the feedback variation based on the comparing. The feedback variation is compared to a feedback variation threshold. An input signal associated with the activation signal for controlling the linear actuator is monitored and the input signal compared to an input signal threshold. The electrical overload condition is detected when the feedback variation is less than the feedback variation threshold and the input signal is greater than the input signal threshold.
公开/授权文献
- US08972032B2 Method for overload protection of SMA device 公开/授权日:2015-03-03