Gorbet & Wang : Stability of an Sma Position Control System
نویسندگان
چکیده
| This paper deals with the L 2 stability of a shape memory alloy (SMA) actuated position control system , based on a single SMA wire under constant axial load. It is shown that system stability can be guaranteed for a large class of controllers having certain dissipativity characteristics. In particular, the results can be used to show stability under approximated PID, PI and PD control. Experimental step responses are given for two diierent PI controllers. The rst controller guarantees a stable response, based on the work presented. While the second system displays superior performance and seems stable, it does not satisfy the stability criterion of the paper. This comparison underscores the conservative nature of the stability result.
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تاریخ انتشار 1998