音圈直线电机滑模变结构控制方法  

Sliding Mode Variable Structure Control for Voice Coil Linear Motor

作　　者：张鑫宇 吴忠实 周淼磊[1] ZHANG Xinyu;WU Zhongshi;ZHOU Miaolei(College of Communication Engineering,Jilin University,Changchun Jilin 130022)

机构地区：[1]吉林大学通信工程学院,吉林长春130022

出　　处：《东北电力大学学报》2023年第5期24-31,共8页Journal of Northeast Electric Power University

基　　金：吉林省中青年科技创新创业卓越人才(团队)项目(创新类)(20220508139RC)。

摘　　要：为了消除音圈直线电机的非线性摩擦特性对系统定位精度的影响,利用机理建模方法建立线性模型描述音圈直线电机系统的幅频及相频特性并采用最小二乘法辨识模型参数。此外,采用摩擦力测试和牛顿第二定律得到系统的等效非线性项参数,利用辨识得到的线性模型与等效非线性项参数,设计了一种含有等效非线性控制项的滑模变结构控制器。实验结果表明,提出的控制方法能够改善音圈直线电机的定位精度,并提升了系统的动态性能。In order to eliminate the influence of the nonlinear friction characteristics of the voice coil linear motor on the positioning accuracy of the system,a linear model is established to describe the amplitude-frequency and phase-frequency characteristics of the voice coil linear motor system by using the mechanism modeling method,and the least-squares method is used to identify the model parameters.In addition,the friction force test and Newton′s second law are used to obtain the equivalent nonlinear term parameters of the system,and a sliding-mode variable-structure controller containing the equivalent nonlinear control term is designed using the identified linear model and the equivalent nonlinear term parameters.Experimental results show that the proposed control method can improve the positioning accuracy of the voice coil linear motor and enhance the dynamic performance of the system.

关 键 词：音圈直线电机 最小二乘辨识 非线性摩擦 滑模变结构控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]