Effect of small fluctuation on perceived length by static holding

Takashi Irie, Hideo Nakanishi, Hiroshi Uragaki, Naofumi Fujita

Research output: Contribution to journalArticlepeer-review


The perception models which explain perceived lengths of objects by static holding have two assumptions. One is strict rest of objects and the other is small fluctuation of them. In this paper, we measured the fluctuation of objects by using a 6 DOF (degrees of freedom) tracking system. It made clear firstly that the objects were certainly fluctuating. Secondly, the fluctuation was divided into the initial part just after the start of holding and the steady part after that. Thirdly, the fluctuation of the initial part was bigger than that of the steady part, but much smaller than that of wielded objects. We considered a muscle torque model, MTM, which consisted of a static moment and an inertia moment. The relation between angular acceleration and the coefficients of the MTM showed that subjects perceived lengths depending on dynamic characteristics of objects so much as angular acceleration increased.

Original languageEnglish
Pages (from-to)903-912
Number of pages10
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Issue number775
Publication statusPublished - 2011


  • Dynamic Touch
  • Emotion
  • Human Interface
  • Inertia Tensor
  • Kansei and Enbodiment
  • Length Perception
  • Measurement
  • Static Holding
  • Static Moment

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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