电工技术学报2017，Vol.32Issue(9)：1-9,9.
基于组合继电反馈的永磁同步直线电机力波动辨识方法
An Identification Method of Force Ripple in Permanent Magnet Synchronous Linear Motors Based on the Combined Relay Apparatus
摘要
Abstract
Force ripples,caused by slot force and end force,are the significant factor which restricts the dynamic performance of linear motors.As a consequence,a new identification method based on the relay feedback was proposed to model and compensate for the force ripples in linear notors.Taking the direct feed platform as a researching object,the dynamic of the system was modeled and a signal source which included an ideal relay component and a hysteresis relay component along with dead zone was designed firstly.Hence,dual input description functions were obtained by implementing the method of describe function to linearize the designed relay components.Furthermore,the analytical expressions of the identified parameters in the nonlinear system were solved according to the requirement for oscillation.Finally,simulation study has been carried out for validating the feasibility and accuracy of the method while relevant experiments were conducted on the platform.Experiment results have shown that the thrust current fluctuation was reduced 46.3％ while the RMSE of the tracking error can be reduced from 34.1 μm to 19.3 μm.关键词
直线电机/极限环/参数辨识/继电反馈/推力波动Key words
Linear motors/oscillation/parameter identification/relay feedback/force ripple分类
信息技术与安全科学引用本文复制引用
张翔,叶佩青,张辉..基于组合继电反馈的永磁同步直线电机力波动辨识方法[J].电工技术学报,2017,32(9):1-9,9.基金项目
国家科技支撑计划项目(2015BAI03B00)、清华大学摩擦学国家重点实验室重点项目(SKLT12A03)及北京市科技计划项目(Z141100000514015)资助. （2015BAI03B00）
