{"title":"Variable-Structure Disturbance Observers for Harmonic Drive Actuators","authors":"Yu-Sheng Lu, Chi-Sheng Hwang","doi":"10.1109/IECON.2007.4460289","DOIUrl":null,"url":null,"abstract":"This paper presents the design of a high-order variable-structure disturbance observer (VSDO) that yields asymptotic estimation of unknown disturbances described by polynomial functions of time with arbitrary degrees. In comparison with conventional VSDO, the high-order VSDO requires a small switching gain for ensuring the existence of a sliding mode, thus diminishing the chattering phenomenon further. Two high-order VSDOs were implemented to simultaneously observing the motor-side and the load-side disturbances in a harmonic drive actuator. Experimental results show that the compensation provided by the high-order VSDOs effectively deals with the disturbances due to harmonic drive gearing.","PeriodicalId":199609,"journal":{"name":"IECON 2007 - 33rd Annual Conference of the IEEE Industrial Electronics Society","volume":"76 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IECON 2007 - 33rd Annual Conference of the IEEE Industrial Electronics Society","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IECON.2007.4460289","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
This paper presents the design of a high-order variable-structure disturbance observer (VSDO) that yields asymptotic estimation of unknown disturbances described by polynomial functions of time with arbitrary degrees. In comparison with conventional VSDO, the high-order VSDO requires a small switching gain for ensuring the existence of a sliding mode, thus diminishing the chattering phenomenon further. Two high-order VSDOs were implemented to simultaneously observing the motor-side and the load-side disturbances in a harmonic drive actuator. Experimental results show that the compensation provided by the high-order VSDOs effectively deals with the disturbances due to harmonic drive gearing.