机械与电子2023，Vol.41Issue(12)：3-9,7.
基于高斯过程的压电驱动系统磁滞特性建模
Modeling of Hysteresis in Piezoelectric-actuated Systems Based on Gaussian Process
摘要
Abstract
In current research on modeling of the hysteresis nonlinear relationship between output dis-placement and control voltage of a piezoelectric-actuated system,the complexity of modeling process and generality of model can not be guaranteed at the same time.To solve the problem,a new system modeling method is proposed.Firstly,based on the rate-independent characteristics of the hysteresis in piezoelectric actuators,a Hammerstein model which decouples the hysteresis and the linear dynamics is established to simplify the modeling process.On this basis,a statistical description about the control voltage,the output displacement and their first-order derivative is built with a Gaussian process(GP).And the hysteresis characteristic model is derived accordingly.Meanwhile,the linear dynamics of the system is modeled with the auto-regressive with extra inputs(ARX)method and the parameter identification process is given.The complete model are universal so that it is applicable to input with different features.The system out-put prediction experiment shows that the proposed method can effectively characterize the system proper-ties while the output prediction error is lower than about 2％.The comparison with existing method dem-onstrates the advantages of the proposed method in parameter identification efficiency and system modeling accuracy.关键词
压电驱动器/磁滞非线性/系统建模/高斯过程/有源自回归模型Key words
piezoelectric actuator/hysteresis nonlinearity/system modeling/Gaussian process/auto-re-gressive with extra inputs分类
信息技术与安全科学引用本文复制引用
黄鹏升,丁烨..基于高斯过程的压电驱动系统磁滞特性建模[J].机械与电子,2023,41(12):3-9,7.基金项目
国家自然科学基金资助项目(52275501) （52275501）
