| 摘要 |
<p>A technique for controlling output of a shape memory alloy (SMA) actuator in the presence of fatigue involves a control system for selectively controlling a heater in dependence on a desired actuation of the SMA element, a monitored stress on the SMA actuator, and a monitored resistance of the SMA element, wherein the control system is adapted to compare an electrical resistance exhibited by the SMA element in an austenitic phase during a first actuation of the SMA actuator, with an electrical resistance of the SMA element in a recent austenitic phase to estimate a degree of fatigue. This estimate may be used to improve actuator replacement schedules, and may further be used to compensate for the effect of fatigue.</p> |
