ANALOG ANALYSIS OF A TRACKED AIR-CUSHION VEHICLE

TRACKED AIR-CUSHION VEHICLES (TACV) ARE BEING CONSIDERED FOR HIGH-SPEED GROUND TRANSPORTATION SYSTEMS. PRELIMINARY STUDIES HAVE DEMONSTRATED THE ADVANTAGES OF LOW MOVING FRICTION, SMALL DYNAMIC UNBALANCE, AND DISTRIBUTED LOADING ON GUIDEWAYS. HOWEVER THE ULTIMATE SUCCESS OF A TACV WILL BE LARGELY DETERMINED BY HUMAN FACTORS SUCH AS NOISE, SAFETY, AND RIDE QUALITY. UNDERSTANDING OF AIR-CUSHION DYNAMICS IS ESSENTIAL FOR VEHICLE DESIGN AND CONTROL, IN ORDER TO ACHIEVE ACCEPTABLE LEVELS OF THESE PARAMETERS. SEVERAL STUDIES HAVE BEEN PERFORMED TO EXAMINE THE HEAVE MOTION AND STABILITY OF AIR-SUPPORTED VEHICLES. THE VEHICLE CAN BE MODELED AS A ONE-DEGREE-OF-FREEDOM SYSTEM, CONSISTING OF A MASS SUPPORTED BY A SINGLE OPEN-PLENUM AIR CUSHION, OPERATING AT SOME GAP HEIGHT ABOVE THE GUIDEWAY. THE EQUATIONS FOR THE CUSHION CAN BE SOLVED WITH AN ANALOG COMPUTER. PARAMETERS TO BE VARIED INCLUDE MAXIMUM INPUT AMPLITUDE, DEAD VOLUME, SUPPLY PRESSURE RATIO, AND NET EQUILIBRIUM SUPPORT PRESSURE. THE COMPUTER PRODUCED TIME HISTORIES OF VEHICLE ACCELERATION, ABSOLUTE DISPLACEMENT, NET CUSHION SUPPORT PRESSURE, GAP HEIGHT, AND ACTIVE LIP DISPLACEMENT FOR EACH SET OF PARAMETERS. /AUTHOR/

  • Authors:
    • Leatherwood, J D
  • Publication Date: 1972-4

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00241696
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 9 1972 12:00AM