Position Control of Shape Memory Alloy Actuator Using Hysteresis Model

Kazuyuki Kodama; Tadahiro Hasegawa; Sumiko Majima

doi:10.1299/kikaic.65.4708

Position Control of Shape Memory Alloy Actuator Using Hysteresis Model

Kazuyuki Kodama, Tadahiro Hasegawa, Sumiko Majima

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The tracking control accuracy of shape memory alloy (SMA) actuator is limited due to inherent hysteresis nonlinearity. It has been said that a push-pull type mechanism and the insertion of a resistance feedback loop are useful to effects of the hysteresis. This paper presents a position control system for compensating the hysteresis without such constraints. It is composed of feedforward loop and PID feedback loop. In the feedforward loop, the desired input corresponding to the desired displacement is obtained from a model of hysteresis. The proposed control system is applied to a bias spring type SMA actuator that is more difficult to be controlled accurately than a push-pull type one. Experimental results show that tracking control performance is greatly improved.

Original language	English
Pages (from-to)	4708-4713
Number of pages	6
Journal	Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume	65
Issue number	640
DOIs	https://doi.org/10.1299/kikaic.65.4708
Publication status	Published - 1999 Jan 1
Externally published	Yes

Keywords

Actuator
Hysteresis
Nonlinear Control
Positioning
Shape Memory Alloy

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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AB - The tracking control accuracy of shape memory alloy (SMA) actuator is limited due to inherent hysteresis nonlinearity. It has been said that a push-pull type mechanism and the insertion of a resistance feedback loop are useful to effects of the hysteresis. This paper presents a position control system for compensating the hysteresis without such constraints. It is composed of feedforward loop and PID feedback loop. In the feedforward loop, the desired input corresponding to the desired displacement is obtained from a model of hysteresis. The proposed control system is applied to a bias spring type SMA actuator that is more difficult to be controlled accurately than a push-pull type one. Experimental results show that tracking control performance is greatly improved.

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