Multirate-Based Composite Controller Design of Piezoelectric Actuators for High-Bandwidth and Precision Tracking

Author

Lei Liu ; Kok Kiong Tan ; Tong Heng Lee

Author_Institution

NUS Grad. Sch. for Integrative Sci. & Eng., Nat. Univ. of Singapore, Singapore, Singapore

Volume

22

Issue

2

fYear

2014

fDate

Mar-14

Firstpage

816

Lastpage

821

Abstract

To track trajectories at rates higher than the resonant frequencies of piezoelectric actuators, this brief presents a comprehensive design method of a multirate-based composite controller consisting of a robust H∞ feedback controller and an inversion-based feedforward controller. The feedback controller is designed for stability and robustness in the presence of disturbances and modeling errors. It is designed for high-bandwidth tracking by reducing phase-lag and gain distortion to overcome the feedback limitation. The proposed composite controller is realized in a piezoelectric stage based on a DSPACE 1104 board. Finally, high-bandwidth and precision tracking are validated in the experimental studies.

Keywords

H^∞ control; control system synthesis; feedback; feedforward; piezoelectric actuators; position control; robust control; comprehensive design method; gain distortion reduction; high-bandwidth tracking; inversion-based feedforward controller; multirate-based composite controller design; phase-lag reduction; piezoelectric actuators; precision tracking; resonant frequencies; robust H∞ feedback controller; stability; High bandwidth; hysteretic dynamics; piezoelectric actuator (PA); resonant frequency;

fLanguage

English

Journal_Title

Control Systems Technology, IEEE Transactions on

Publisher

ieee

ISSN

1063-6536

Type

jour

DOI

10.1109/TCST.2013.2256135

Filename

6515629