中国机械工程2018，Vol.29Issue(7)：835-841,7.DOI:10.3969/j.issn.1004-132X.2018.07.013
基于最小二乘支持向量机的压电作动器迟滞非线性建模及参数辨识
Nonlinear Modeling and Parameter Identification of Hysteresis Characteristics on Piezoelectric Actuator Based on LS-SVM
摘要
Abstract
In order to identify hysteresis characteristics of piezoelectric actuators in the processes of applications,the hybrid modeling method of Preisach model and LS-SVM was adopted.Initial weigh-ted coefficients in α-β plane were calculated based on Preisach model through first order reverse curves.Centroid of hysteresis units and initial weighted coefficients were used as inputs and outputs of the LS-SVM which optimized by genetic algorithm.The finer weighted coefficients were calculated based on the optimized model and desired hysteric model was set up.Through the contrast between results of simulated model and the experimental results,errors stay between 0.12%~2.01%.Results show that the established model may accurately describe the hysteresis non-linearity of piezoelectric actuators and the proposed method is a practicable method.关键词
压电作动器/迟滞特性/参数辨识/最小二乘支持向量机Key words
piezoelectric actuator/hysteresis characteristics/parameter identification/least squares support vector machine(LS-SVM)分类
信息技术与安全科学引用本文复制引用
钱承,胡红生..基于最小二乘支持向量机的压电作动器迟滞非线性建模及参数辨识[J].中国机械工程,2018,29(7):835-841,7.基金项目
浙江省自然科学基金资助项目 (Y1110313, LQ17E050010) （Y1110313, LQ17E050010）
浙江省公益性技术项目(2016C31051) （2016C31051）
嘉兴市科技计划资助项目(2016AY13003) （2016AY13003）
