Abstract
Considering the influence of hysteresis non-linearity characteristics of piezoelectric actuators on positioning control accuracy, a fuzzy adaptive sliding mode control strategy based on an extended state observer (ESOFASMC)is proposed. An improved Bouc-Wen model combined with a linear dynamic model is used to establish the mathematical model of the piezoelectric actuator. Based on this model, the extended state observer and fuzzy adaptive sliding mode controller are designed, along with the corresponding parameter design process. A simulation platform built using MATLAB/Simulink to compare the performance of different control strategies. The ESOFASMC strategy was also tested experimentally on a prototype of a piezoelectric linear motor. Simulation and experimental results verify the effectiveness and superiority of the ESOFASMC control strategy. The maximum root mean square tracking error is 0. 014 9 μm, and the maximum positioning error is 0. 381 μm. Compared with other control strategies, ESOFASMC offers a wider frequency response, better tracking performance, faster convergence speed, and higher positioning accuracy.
| Translated title of the contribution | Sliding Mode Control of Piezoelectric Linear Motors Based on an Extended State Observer |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 1124-1131 |
| Number of pages | 8 |
| Journal | Yadian Yu Shengguang/Piezoelectrics and Acoustooptics |
| Volume | 47 |
| Issue number | 6 |
| DOIs | |
| State | Published - Dec 2025 |
| Externally published | Yes |
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