抄録
There has been great demand for shape memory alloy (SMA) actuators within the field of micro-machines. However, the thermomechanical behavior of SMA actuators is too complicated to accurately predict their response. Moreover the tracking control accuracy of SMA actuators is limited due to the inherent hysteresis nonlinearity. This paper presents a model of SMA actuator for use in mechanical design and a control system for compensating the hysteresis. First, the model based on constitutive laws developed by Brinson et al. and our proposed hysteresis model is demonstrated. Next, we propose a control system composed of the proportional integral derivative (PID) feedback loop and a feedforward loop. In the feedforward loop, the desired control input corresponding to the desired displacement is obtained from a static SMA model derived by modifying the classic Preisach hysteresis model. We also propose a method for identifying parameters of the hysteresis model. This methods demands only measurement of the major loop. Application of the control system to our developed SMA actuator shows that the tracking control performance is improved.
本文言語 | English |
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ページ(範囲) | 54-59 |
ページ数 | 6 |
ジャーナル | IEEE Transactions on Control Systems Technology |
巻 | 9 |
号 | 1 |
DOI | |
出版ステータス | Published - 2001 1月 1 |
外部発表 | はい |
ASJC Scopus subject areas
- 制御およびシステム工学
- 電子工学および電気工学