Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/35527
Title: HIGH-BANDWIDTH IDENTIFICATION AND COMPENSATION OF HYSTERETIC DYNAMICS
Authors: LIU LEI
Keywords: Piezoelectric actuator, Preisach hysteresis, singapore value decomposition, hysteretic dynamics, high-bandwidth identification, precision motion.
Issue Date: 13-Jul-2012
Source: LIU LEI (2012-07-13). HIGH-BANDWIDTH IDENTIFICATION AND COMPENSATION OF HYSTERETIC DYNAMICS. ScholarBank@NUS Repository.
Abstract: Piezoelectric actuators (PAs) are increasingly used to enable precision engineering applications, but a factor which limits the precision in the motion control of PAs is the phenomenon of hysteresis. This thesis focuses on approaches for the identification and compensation of hysteresis as well as other dynamics to achieve a higher precision in the motion control over a broad range of frequencies. An approach striving in the low input frequency range is designed for the identification and compensation of Preisach hysteresis using singular value decomposition (SVD)-based least squares estimation. When the input frequency is increased, the electric and vibration dynamics of PAs are identified. At broadband frequencies, a comprehensive approach for the identification of hysteretic dynamics is developed. Based on the identified hysteretic dynamics, model-based compensators are designed to achieve precision motion over a high bandwidth. The effectiveness of the identification and compensation strategies is validated in the experimental studies.
URI: http://scholarbank.nus.edu.sg/handle/10635/35527
Appears in Collections:Ph.D Theses (Open)

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