High path tracking control of an intelligent walking-support robot under time-varying friction and unknown parameters

Yina Wang*, Shuoyu Wang, Kenji Ishida, Yo Kobayashi, Masakatsu G. Fujie, Takeshi Ando

*この研究の対応する著者

研究成果: Article査読

4 被引用数 (Scopus)

抄録

Walking is the most fundamental requirement for independent living in daily life. An intelligent walking-support robot has been developed for use by people with walking disabilities. To appropriately assist the user, the robot must precisely track the user’s intentions. However, the robot’s tracking accuracy is severely compromised by time-varying friction, center-of-gravity (CoG) shifts, and load changes induced by the user. In a previous study, we proposed a digital acceleration controller with online inertial parameter identification. However, the tracking accuracy was still affected by CoG shifts introduced by the users. To address these issues, the current study investigated a novel dynamic model, wherein all the load and CoG information processed in the inertial matrix was derived and a new digital acceleration controller with parameter estimation was used to compensate for the time-varying friction, CoG shifts, and load changes. Experiments were conducted under different floor and load conditions to demonstrate the improved tracking accuracy of the proposed control method.

本文言語English
ページ(範囲)739-752
ページ数14
ジャーナルAdvanced Robotics
31
14
DOI
出版ステータスPublished - 2017 7月 18

ASJC Scopus subject areas

  • 制御およびシステム工学
  • ソフトウェア
  • 人間とコンピュータの相互作用
  • ハードウェアとアーキテクチャ
  • コンピュータ サイエンスの応用

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