Imaginary motor control for the table of machine tools with 3 linear servo motors

Yasuhiro Kakinuma, Seiichiro Katsura, Kouhei Ohnishi, Tojiro Aoyama, Junya Isogai, Katsuhiko Yokoi

Research output: Contribution to journalArticle

5 Citations (Scopus)


The linear motor driving mechanism is adopted for positioning mechanism of the machine tools to realize high speed and precise positioning, because of frictionless and no backlash. When the table of machine tools is driven at high speed, two or more linear motors are used for the same axis to obtain the high thrust power. In case of using more linear motors, however, the position of the table changes because the thrust force of each linear motor doesn't become the same. In addition, this causes to generate micro vibration and to change the velocity of each linear motor due to yawing around the center of gravity. In this study, the imaginary motor control method was proposed with three linear motors for driving table to control the position of the gravity, the vibration and yawing. From the results of simulation and the experiments, it is confirmed that the proposed method can control the position of the gravity, the vibration and yawing independently.

Original languageEnglish
Pages (from-to)150-155
Number of pages6
JournalSeimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering
Issue number1
Publication statusPublished - 2007 Jan 1



  • Acceleration control
  • Disturbance observer
  • Driving table
  • Imaginary motor control
  • Linear motor
  • Machine tool
  • Motion control
  • Position control

ASJC Scopus subject areas

  • Mechanical Engineering

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