Task description and control for redundant system by oblique coordinate control

Sho Sakaino, Tomoya Sato, Kouhei Ohnishi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


This paper proposes a novel task description for redundant systems as an extension of oblique coordinate control. Orthogonality of tasks are not necessary and interference between a task space and a null space is precisely described in off-diagonal parameters of "task mass matrix" in this method. Dynamics of the null space is also considered with its basic variables. In order to decouple the spaces, a null space regulator is proposed. Conventionally, this kind of decoupling is given by selecting a mass matrix as a weighting matrix of the pseudo inverse. On the other hand, arbitrary weighting matrices can be selected in our approach. Some comments for sub tasks are given. In a short word, " there is few need of sub tasks". Validity of the proposed method is analyzed and is confirmed by experiments.

Original languageEnglish
Pages (from-to)1015-1021+9
Journalieej transactions on industry applications
Issue number8
Publication statusPublished - 2010 Sep 28


  • Acceleration control
  • Bilateral control
  • Hybrid control
  • Oblique coordinate control
  • Redundant system

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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