Hysteresis compensation of piezoelectric actuator for open-loop control

作者：Wang Geng; Guan Chunlin; Zhou Hong; Zhang Xiaojun; Rao Changhui^*

来源：Chinese Optics Letters, 2013, 11(SUPPL.2): S21202.

DOI：10.3788/COL201311.S21202

• Adaptive optics systems
• Deformable mirrors
• Hysteresis compensation
• Hysteresis non linearities
• Open loop operation
• Positioning precision
• Prandtl-Ishlinskii model
• Trajectory tracking

Received January 21, 2013;accepted March 5, 2013;posted online July 30, 2013 The hysteresis nonlinearity of piezoelectric actuator is one of the main defects in the control of deformable mirror which is widely used as a key component in adaptive optics system. This letter put forward a modified Prandtl-Ishlinskii (PI) model in order to precisely describe the hysteresis nonlinearity of piezoelectric actuator. With this proposed model, an inverse-model based controller used for trajectory tracking in open-loop operation is designed to compensate the hysteresis nonlinearity effect. Then, some tracking control experiments for the desired triangle trajectory are performed. From the experimental results, we can see that the positioning precision in open loop operation is significantly improved with this inverse-model based controller.

• 出版日期2013
• 单位中国科学院大学