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Variable stiffness control and implementation of hydraulic SEA based on virtual spring leg

  • Harbin Institute of Technology

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

SLIP model with compliance describes human locomotion very well. A Legged robot's variable stiffness joint could produce an equivalent virtual spring leg, which is the foundation for SLIP model's physical implementation. This paper presents a single leg with knee joint actuated by hydraulic SEA and proposes a variable stiffness control method that is applied to the virtual spring leg. The experiment results prove the effectiveness of proposed control method and also present that the designed hydraulic SEA could realize virtual spring leg with stiffness adjustable from 5KN/m to 20KN/m, which is the stiffness needed in human's normal walking. The robot's single leg weighs about 6kg and could burden at least 60kg load, which provides a way to realize the heavy load legged robot with variable stiffness joint.

Original languageEnglish
Title of host publication2016 IEEE International Conference on Mechatronics and Automation, IEEE ICMA 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages677-682
Number of pages6
ISBN (Electronic)9781509023943
DOIs
StatePublished - 1 Sep 2016
Event13th IEEE International Conference on Mechatronics and Automation, IEEE ICMA 2016 - Harbin, Heilongjiang, China
Duration: 7 Aug 201610 Aug 2016

Publication series

Name2016 IEEE International Conference on Mechatronics and Automation, IEEE ICMA 2016

Conference

Conference13th IEEE International Conference on Mechatronics and Automation, IEEE ICMA 2016
Country/TerritoryChina
CityHarbin, Heilongjiang
Period7/08/1610/08/16

Keywords

  • Hydraulic SEA
  • Variable stiffness control
  • Virtual spring leg

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