Abstract
A dual-stage servo system consists of a primary coarse actuator for facilitating large motion and a secondary micro-actuator for small but precise motion to improve tracking performance. Piezoelectric micro-actuator made from lead zirconate titanate (PZT) has been a popular choice for the secondary stage. However, the advantage gained by the resolution of the secondary PZT actuator is reduced by its inherent hysteresis nonlinearity. Model based hysteresis compensation techniques are preferred due to their simplicity and fast response. Identification and modeling are two substantial parts in such model-based techniques. This paper presents a rigorous analysis and modeling of the hysteresis of PZT micro-actuator. Modified Generalized Prandtl-Ishlinskii and Coleman-Hodgdon models are studied. Identification of the model through nonlinear least square and particle swarm optimization are examined and compared. Several analyses are done through tuning of the model parameters and identification techniques. Experimental analysis and simulation results underscore the effectiveness of this modeling approach. Finally as a design example, a dual-stage simulation analysis is done to show the effectiveness of systematic modeling on hysteresis compensation.
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This work was supported by the Singapore National Research Foundation (NRF) under CRP Award (Nos. NRF-CRP-4-2008-06, IMRE/10-1C0107).
Md. Arifur RAHMAN received his BSc degree in Electrical and Electronic Engineering from Bangladesh University of Engineering and Technology, Dhaka, Bangladesh in October2009. Currently he is working toward the Ph.D. degree at the department of Electrical and Computer Engineering, National University of Singapore, Singapore. He is attached with the Mechatronics and Automation Lab. His current research includes the design and control of high precision servo system with the application to hard disk drive. His areas of focus are resonance compensation and hysteresis control of high precision servo systems.
Abdullah Al MAMUN is currently an Associate Professor in the Department of Electricala nd Computer Engineering, National University of Singapore. He graduated from I.I.T. Kharagpur, India in 1985 and obtained Ph.D. from National University of Singapore in 1997. He has published 50 journal papers and about 60 papers in conference proceedings; he has co-authored one book. His research interests are in the areas of precision servomechanism, intelligent control and mobile robots.
Kui YAO received his bachelor degree in E.E. and Ph.D in electronic materials and devices, both from **’an Jiaotong University, China, in 1989 and 1995, respectively, and his master degree in technical physics from **dian University, China, in 1992. Currently, he is a principal scientist, and the manager of Sensor and Transducer Program, in Institute of Materials Research and Engineering (IMRE), A*STAR, Singapore. During 1998 - 1999, he worked in the Materials Research Laboratory, The Pennsylvania State University,USA. Previously, he was a postdoctoral research fellow in the Microelectronics Center at Nanyang Technological University (NTU),Singapore, during 1995-1997. His research interests cover smart materials with signal and energy conversion and storage functions, including ferroic, piezoelectric, photovoltaic, and biochemical sensing materials, material-critical sensors, actuators, transducers, and their applications.
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Rahman, M.A., Mamun, A.A. & Yao, K. Analysis and modeling of hysteresis of piezoelectric micro-actuator used in high precision dual-stage servo system. Control Theory Technol. 13, 184–203 (2015). https://doi.org/10.1007/s11768-015-4150-2
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DOI: https://doi.org/10.1007/s11768-015-4150-2