Inverse-feedforward control can substantially improve the performance of piezoelectric positioners (piezopositioners). The feedforward-input is found by modeling and inverting the piezopositioner dynamics. The primary challenge in such an approach is the complexity of modeling and inverting the hysteresis nonlinearity in the piezopositioner dynamics. The main contribution of this work is to alleviate this complexity by using charge control to linearize the overall dynamics and then model and invert the simplified (linearized) dynamics. The proposed approach is applied to an experimental piezopositioner and results are presented to contrast the feedforward-based positioning performance with and without the use of charge control to linearize the dynamics.
|Number of pages||9|
|Publication status||Published - 2008 Jun 1|
All Science Journal Classification (ASJC) codes
- Mechanical Engineering
- Computer Science Applications
- Electrical and Electronic Engineering