NDLI: The modelling and L/sub 2/-stability of a shape memory alloy position control system

Content Provider	IEEE Xplore Digital Library
Author	Madill, D.R. Wang, D.
Copyright Year	1994
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada (Madill, D.R.; Wang, D.)
Abstract	Shape memory alloys (SMAs) are inherently non-linear devices exhibiting significant hysteresis in their stress-strain-temperature characteristic. As a consequence most SMA actuator systems presented in the literature employ some form of PID or PWM controller. Unfortunately, due to the hysteresis of the SMA, the theoretical stability of these systems has been largely ignored. This paper extends the work of Ikuta et al. (1991) to arrive at a new model of an SMA actuator. The model is then used to prove the L/sub 2/-stability of a position control system. The key feature of the model is its ability to model minor hysteresis loops. The model is suitable for computer simulation and control system analysis. The stability result accounts for the complex non-linear behaviour of the SMA actuator, along with non-linear effects such as saturation.
Starting Page	293
Ending Page	299
File Size	660553
Page Count	7
File Format	PDF
ISBN	0818653302
DOI	10.1109/ROBOT.1994.350975
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-05-08
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Hysteresis Actuators Pulse width modulation Stability Shape memory alloys Three-term control Control systems Position control Computer simulation Control system analysis
Content Type	Text
Resource Type	Article

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