基于超螺旋滑模观测器的电磁直线执行器位移估计与分析  

Displacement Estimation and Analysis of Electromagnetic Linear Actuator Based on Superhelical Sliding Mode Observer

作　　者：房金石 李德同 任浩鑫 葛文庆[1] 谭草 FANG Jinshi;LI Detong;REN Haoxin;GE Wenqing;TAN Cao(School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo Shandong 255049,China)

机构地区：[1]山东理工大学交通与车辆工程学院,山东淄博255049

出　　处：《机床与液压》2025年第6期64-68,共5页Machine Tool & Hydraulics

基　　金：国家自然科学基金项目(52305265,52375105);山东省自然科学基金项目(ZR2023ME178);山东省优秀青年人才基金项目(ZR2022YQ51);山东省重大科技创新工程项目(2021CXGC010703)。

摘　　要：常规滑模观测器在电磁直线执行器位移估计过程中存在剧烈的抖振现象。针对此,提出一种基于超螺旋滑模观测器的位移估计方法。建立电磁直线执行器数学模型,根据高阶滑模原理,将切换项放入积分项中并设计了超螺旋滑模观测器;在观测器后设计低通滤波器,消除等效反电动势中开关函数带来的高频干扰。基于李雅普诺夫原理证明了系统是渐进稳定的。仿真与实验结果表明:相对于滑模观测器,所提基于超螺旋滑模观测器的电磁直线执行器位移估计方法有效减弱了抖振现象,提高了位移估计的准确度与鲁棒性。The drastic vibration jitter phenomenon occurs during the displacement estimation process of electromagnetic linear actuators using conventional sliding mode observers.In order to address the problem,a method for estimating displacement based on a superhelical sliding mode observer was proposed.A mathematical model of electromagnetic linear actuators was established.A superhelical sliding mode observer was designed by incorporating the switching term into the integral term based on the principle of higher-order sliding mode.A low-pass filter was designed after the observer to eliminate high-frequency interference caused by the switching function in the equivalent inverse electromotive force.Simulations and experiments results demonstrate that in contrast to the sliding mode observer,the proposed displacement estimation method for electromagnetic linear actuators based on the superhelical sliding mode observer effectively reduces the resultant jitter phenomenon,and improves the accuracy and robustness of the displacement estimation.

关 键 词：电磁直线执行器 超螺旋滑模观测器 位移估计 高阶滑模 

分 类 号：TH137[机械工程—机械制造及自动化]