Affiliations: [a] School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan, Hubei, China | [b] School of Mechanical and Electrical Engineering, Central South University, Changsha, Hunan, China | [c] State Key Laboratory of High-Performance Complex Manufacturing, Central South University, Changsha, Hunan, China
Correspondence:
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Corresponding author: Guoliang Zhong, School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, Hunan, China. E-mail:zhonggl2010@163.com
Abstract: In this paper, a controller based on error and the inverse segmented model,
is used to control the position of an SMA actuator. First an inverse model
using three segments for both heating and cooling processes is built and
experiments are used to validate the model and to identify the parameters.
Then a controller, which is based on inverse segmented model and the value
of error between the reference and actual displacement, is proposed in the
position control process. Furthermore, experimental results demonstrate that
the proposed controller performs better than both traditional PID controller
and inverse segmented model controller.
Keywords: SMA actuator, inverse hysteresis compensation, tracking control
