A Decentralized Force Controller Synthesis for Compliant Robots Driven by Series Elastic Actuators

Emre Sariyildiz, Rahim Mutlu, Takahiro Nozaki, Toshiyuki Murakami

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

This paper deals with the decentralized force control problem of compliant robots driven by Series Elastic Actuators (SEAs). The decentralized force control problem of a compliant robot manipulator is transformed into the robust position control problem of a servo system by using Hooke's law and lumping the nonlinear dynamics and unknown disturbances of the robot manipulator into a fictitious disturbance variable. In order to precisely follow the reference force trajectories at joint space, i.e., the position trajectories of the servo systems, the robust controller is synthesized by using Disturbance Observer (DOb) and Sliding Mode Control (SMC). Although the robust force controller can be synthesized by using only SMC, the force control signal may suffer from high control signal chattering as the force reference input is increased. In addition to improving the robustness of force control, DOb significantly suppresses the discontinuous control signal chattering by allowing to decrease the SMC gain. When the proposed decentralized robust force controller is implemented, the compliant robot can precisely track desired force trajectories and safely contact to different environments. The validity of the proposed force controller is verified by giving the simulation results of a redundant robot manipulator.

本文言語English
ホスト出版物のタイトルProceedings - 2019 IEEE International Conference on Mechatronics, ICM 2019
出版社Institute of Electrical and Electronics Engineers Inc.
ページ661-666
ページ数6
ISBN(電子版)9781538669594
DOI
出版ステータスPublished - 2019 5 24
イベント2019 IEEE International Conference on Mechatronics, ICM 2019 - Ilmenau, Germany
継続期間: 2019 3 182019 3 20

出版物シリーズ

名前Proceedings - 2019 IEEE International Conference on Mechatronics, ICM 2019

Conference

Conference2019 IEEE International Conference on Mechatronics, ICM 2019
CountryGermany
CityIlmenau
Period19/3/1819/3/20

ASJC Scopus subject areas

  • Artificial Intelligence
  • Human-Computer Interaction
  • Automotive Engineering
  • Mechanical Engineering
  • Control and Optimization
  • Industrial and Manufacturing Engineering

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