Disturbance-Observer-Based Hysteresis Compensation for Piezoelectric Actuators

作者：Yi Jingang^*; Chang Steven; Shen Yantao

来源：IEEE/ASME Transactions on Mechatronics, 2009, 14(4): 456-464.

DOI：10.1109/TMECH.2009.2023986

• Compensation
• disturbance observer (DOB)
• hysteresis
• piezoelectric actuator
• smart materials

We present a novel hysteresis compensation method for piezoelectric actuators. We consider the hysteresis nonlinearity of the actuator as a disturbance over a linear system. A disturbance observer (DOB) is then utilized to estimate and compensate for the hysteresis nonlinearity. In contrast to the existing inverse-model-based approach, the DOB-based hysteresis compensation does not rely on any particular hysteresis model, and therefore provides a simple and effective compensation mechanism. We design and fabricate a lead magnesium niobate-lead titanate (PMN-PT) piezoelectric actuator for microscale tip-based power sintering process. Experimental validation of the proposed hysteresis compensation is performed on the PMN-PT cantilever piezoelectric actuator. The experimental results demonstrate the effectiveness and efficiency of the approach.

• 出版日期2009-8