RESEARCH THEME  

・Application of Wave Control to Mechanical Systems

     Researches on the application of Wave Control, a new method of vibration control, for the practical mechanical systems have been conducted. The controlled system becomes virtually an infinitive structure and has no natural frequencies. Besides the disappearance of the resonance peak the amplitude becomes extremely small theoretically. The problem is the control algorithm. I have developed the control method using the psudo-infinitive structure in a computer which is applicable to almost arbitrary mechanical systems.
     The application of this method to the vibration control of Crane Systems have been done,
and the practical effectiveness are confirmed (papers 1 to 3). Now by applying this method a Torsional Vibration Absorber is developing (P1). In the future I will apply this method to the vibration control of rotor system suspended by magnetic bearings.

・Vibration Analysis and Control of Rotating System

     My early research concerned with the Torque Whirl that was found for the first time by myself (4 to 12). The Self-excited Vibration caused by Universal Joints of propeller shaft has been treated (15 to 18). The balancing of the double cylindrical rotor was also studied for super-conducting generator (13 to 14). In the future the vibration of the flywheel system suspended by the super-conducting bearings and active bearings will be treated.
 

・list of papers (without proceedings)

   1) Journal of JSME, PartC,vol.61,No.581,pp.35-42 (1995-1)
   2) Journal of JSME, PartC,(to be published)
   3) Journal of Vibration and Acoustics(ASME), vol.120,April,pp.524-533 (1998)
   4) Journal of JSME, PartC,vol.49,No.442,pp.921-928 (1983-6)
   5) Journal of JSME, PartC,vol.50,No.455,pp.1158-1167 (1984-7)
   6) Journal of Sound and Vibration, vol.95,No.1,pp.9-18 (1984)
   7) Journal of JSME, PartC,vol.51,No.470,pp.2473-2478 (1985-1)
   8) Journal of JSME, PartC,vol.52,No.473,pp.258-263 (1986-1)
   9) Journal of JSME, PartC,vol.52,No.483,pp.2808-2813 (1986-11)
  10) Journal of Sound and Vibration, vol.114,No.3,pp.405-416 (1987)
  11) Journal of JSME, PartC,vol.55,No.511,pp.644-650 (1989-3)
  12) Journal of JSME, PartC,vol.55,No.516,pp.1911-1917 (1995-8)
  13) Journal of JSME, PartC,vol.57,No.537,pp.1542-1547 (1991-5)
  14) Journal of JSME, PartC,vol.58,No.547,pp.710-715 (1992-3)
  15) Journal of JSME, PartC,vol.58,No.546,pp.335-340 (1992-2)
  16) Journal of JSME, PartC,vol.59,No.565,pp.2629-2635 (1993-9)
  17) Journal of Vibration and Acoustics(ASME), vol.119,April,pp.221-229 (1997)
  18) Journal of Sound and Vibration, vol.30,No.1.pp.65-77 (1973)
  19) Journal of JSME, PartC,vol.40,No.334,pp.1576-1586 (1974-6)
  20) Journal of JSME, PartC,vol.47,No.420,pp.1094-1101 (1981-8)  
  21) Journal of JSME,PartC, vol.54,No.502,pp.1285-1290 (1988-6)
  22) Journal of JSME,PartC, vol.54,No.508,pp.3128-3132 (1981-12)
  23) Journal on Magnetics(IEEE), vol.26,No.2,pp.544-547 (1990)
  24) Journal of RSJ, vol.16,No.6,pp.868-875 (1998)
  P1) Proceeding of JSME conference, No.985-1,pp.189-190 (1998-3)
      JSME:Japan Society of Mechanical Engineers (in Japanese)
      RSJ:Robtics Society of Japan (in Japanese)