Modeling of Hysteresis in Piezoelectric Actuator Using Linear Play Operator Adaptive Filter

Abstract:

Piezoelectric actuator (PEA) is widely applied in micro/nanopositioning system. However, its inherent hysteresis limits its application. Modeling of hysteresis plays an important role in solving this problem. Linear play operators (LPO) adaptive hysteresis model is introduced in this paper. LPO operators are used to replace delay operators of adaptive transversal filter to compose a new serial structure of adaptive transversal filter model, and LMS (Least Mean Square) algorithm is used to adjust the weight values. As hysteresis loop of piezoelectric actuator is asymmetric and LPO operator is symmetric, a modified LPO (MLPO) adaptive filter is proposed for asymmetric hysteresis effect. At last, the two LPO filters are applied to model hysteresis characteristic of Piezoelectric actuator, and the modeling effect is verified via a micro-positioning system experiment platform based on Piezoelectric actuator. Experimental results show that the modified LPO filters can achieve better accurate hysteresis modeling.

• Periodical: Key Engineering Materials (Volumes 645-646)
• Pages: 957-962
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.645-646.957
• Online since: May 2015
• Authors: Rui Xiong*, Xiang Dong Liu, Feng Min Shan
• Keywords: Adaptive Filter, Hysteresis, LPO, Modeling, Piezoelectric Actuator

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