Alexander Werner, Bernd Henze, F. Loeffl, S. Leyendecker, C. Ott
{"title":"Optimal and robust walking using intrinsic properties of a series-elastic robot","authors":"Alexander Werner, Bernd Henze, F. Loeffl, S. Leyendecker, C. Ott","doi":"10.1109/HUMANOIDS.2017.8239549","DOIUrl":null,"url":null,"abstract":"Series-Elastic Actuators (SEA) have been proposed as a technology to build robust humanoid robots. The aim of this work is to generate efficient and robust walking for such robots. We present a combined approach which exploits the system dynamics through optimization based trajectory generation and a robust control scheme. The compliant actuator dynamics are explicitly modeled in the optimal control problem. For local stabilization, a passivity based tracking controller distributes the required control forces onto the available contacts. Additionally, a predictive control scheme for step adaptation is presented, which provides feasible contact points in the future. Using a reduced model, this combines efficient walking with robustness against model or environment uncertainties and external disturbances.","PeriodicalId":143992,"journal":{"name":"2017 IEEE-RAS 17th International Conference on Humanoid Robotics (Humanoids)","volume":"127 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2017-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2017 IEEE-RAS 17th International Conference on Humanoid Robotics (Humanoids)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/HUMANOIDS.2017.8239549","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 6
Abstract
Series-Elastic Actuators (SEA) have been proposed as a technology to build robust humanoid robots. The aim of this work is to generate efficient and robust walking for such robots. We present a combined approach which exploits the system dynamics through optimization based trajectory generation and a robust control scheme. The compliant actuator dynamics are explicitly modeled in the optimal control problem. For local stabilization, a passivity based tracking controller distributes the required control forces onto the available contacts. Additionally, a predictive control scheme for step adaptation is presented, which provides feasible contact points in the future. Using a reduced model, this combines efficient walking with robustness against model or environment uncertainties and external disturbances.