NDLI: An approach to reduction of hysteresis in smart materials

Content Provider	IEEE Xplore Digital Library
Author	Cruz-Hernandez, J.M. Hayward, V.
Copyright Year	1998
Description	Author affiliation: Dept. of Electr. Eng., McGill Univ., Montreal, Que., Canada (Cruz-Hernandez, J.M.)
Abstract	This paper addresses the problem of reducing the hysteresis found in the actuation of most smart materials. They are divided in two groups: systems with no saturation (e.g. piezoelectric actuators), and systems with saturation (e.g. shape memory actuators). For the control of the first group the concept of phaser is introduced, an operator which shifts the phase of a periodic signal but keeps its magnitude unchanged. Since it is possible to approximate phasers with linear filters, it is possible to design practical compensators. The design of a phaser requires the knowledge of one parameter /spl phi/, easily identified from experimental transfer function estimates. For the second group, two phasers are used in a tandem connection. One phaser is designed as described before, and the second is designed so as to vary with the input. This compensation reduces the hysteresis to a single saturation. To show its effectiveness, simulation results are provided using the hystery model, then the method is applied to an SMA actuator.
Starting Page	1510
Ending Page	1515
File Size	480605
Page Count	6
File Format	PDF
ISBN	078034300X
ISSN	10504729
DOI	10.1109/ROBOT.1998.677327
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-05-20
Publisher Place	Belgium
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Hysteresis Piezoelectric actuators Phase distortion Piezoelectric materials Shape memory alloys Frequency Machine intelligence Ear Filters Transfer functions
Content Type	Text
Resource Type	Article
Subject	Artificial Intelligence Control and Systems Engineering Electrical and Electronic Engineering Software

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