GMM-based hysteresis modeling and high-performance disturbance rejection tracking control of a piezoelectric actuator

被引：0
|
作者：
Huang P. [1 ]
Li J. [1 ]
Ding Y. [1 ]
机构：
[1] School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai
来源：
Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica | 2024年 / 54卷 / 03期
关键词：
disturbance-rejection; extended state observer; Gaussian mixture model; hysteresis nonlinearity; piezoelectric actuator;
D O I：
10.1360/SST-2023-0160
中图分类号：
学科分类号：
摘要：
The piezoactuated nanopositioning stage eliminates low-frequency errors in fly-cutting. Herein, a novel system modeling strategy is proposed for piezo-actuating units in the stage, and a disturbance rejection tracking control scheme is designed accordingly. First, a Gaussian mixture model (GMM) is used for modeling the inherent hysteresis characteristics of a piezoelectric actuator. Based on this model, a feedforward compensation is performed to eliminate the influence of hysteresis nonlinearity on control accuracy. Second, an extended state observer is established to observe and compensate for all external disturbances and unmodeled errors to enhance the robustness of the control system. For improving the tracking performance and increasing the control bandwidth, state feedback and zero-phase tracking error control strategy are implemented to optimize the characteristics of a closed-loop system. The experimental results confirmed the effectiveness of the disturbance rejection tracking control method based on the proposed system model. While the input signal frequency ranges between 0–50 Hz, this strategy attains a system tracking error of less than 2.2%, thereby satisfying the requirements of high-precision tracking within the desired control bandwidth. © 2024 Chinese Academy of Sciences. All rights reserved.
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页码：443 / 458
页数：15
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