Various Trajectory Tracking Controllers for Piezoelectric Actuator Systems with Dominant Hysteresis

• Main Authors: Chau Jan, 詹超
• Other Authors: Chih-Lyang Hwang
• Format: Others
• Language: en_US
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/57159458999114536413

博士 === 大同大學 === 機械工程研究所 === 91 === In this thesis, the comparison of trajectory tracking controllers for piezoelectric actuator systems (PASs) with dominant hysteresis is presented. Recently, PASs are widely used in precision positioning and vibration suppression. However, piezoceramic materials are ferroelectric, they fundamentally exhibit hysteresis behavior in their response to an applied electric field. The tracking control accuracy of the PASs is probably not excellent because of their inherent nonlinearity and hysteresis. This thesis concentrates on the control issues involved in dealing with the nonlinear hysteresis behavior displayed by most PASs. The following three piezoelectric actuator systems are investigated: (a) high voltage piezoelectric actuator system (HVPAS), (b) large-displacement piezoelectric actuator system (LDPAS), and (c) multiplayer LVPZT (low voltage ) bender actuator system (MLBAS). We also present three methods of system analysis: (a) open-loop system response, (b) hysteresis characteristic, and (c) system modeling. In addition, the trajectory tracking of the PASs are accomplished by the following four controllers: (a) nonlinear observer-based sliding-mode control, (b) fuzzy observer-based robust variable structure control, (c) optimal and reinforced robustness designs of fuzzy variable structure tracking control, and (d) a reinforcement discrete neuro-adaptive control. The stability of the overall system is verified by Lyapunov stability theory. The experiments of PASs are carried out to confirm the usefulness of the proposed control scheme.