APPLICATION OF ACTIVE AND PASSIVE SUSPENSION TECHNIQUES TO IMPROVE HIGH SPEED GROUND VEHICLE PERFORMANCE. PHASE I

The First year's research was aimed at evaluating alternative solutions to improve the lateral ride quality of an intercity passenger train. Early in the program a ride quality test was designed and carried out with the cooperation of AMTRAK on a passenger train traveling between Washington, D.C. and Boston. The ride quality and secondary suspension measurements were used to evaluate the validity of theoretical models. The analytical models were then used to evaluate the potential performance benefits of active and improved lateral passive suspension concepts. First a study was performed assuming ideal sensors and actuators and showed that significant reductions in lateral accelerations can be obtained for relatively low power consumption requirements. Secondly, an analysis was performed incorporating the bandwidth limitations of practical actuators such as pheumatic and hydraulic components. These results showed that reduced bandwidth actuators can still provide a significant ride quality improvement. Thirdly a study was performed to evaluate the potential performance improvements offered by improved passive suspensions. These results indicated that optimized passive suspensions cannot yield significant improvements over the classical parallel spring-damper combinations due to the static stiffness constraints required to limit excessive lateral secondary strokes on superelevated track.

  • Corporate Authors:

    Massachusetts Institute of Technology

    Department of Mechanical Engineering
    Cambridge, MA  United States  02139

    Department of Transportation

    Office of University Research, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Hedrick, J Karl
    • Wormley, D N
    • Buzan, F
    • Celniker, G
    • Partridge, M
  • Publication Date: 1981-10-25

Media Info

  • Pagination: 162 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00396472
  • Record Type: Publication
  • Report/Paper Numbers: DOT/OST/P-34/85-013 Intrm Rpt.
  • Contract Numbers: DTRS5680-C-00018
  • Files: TRIS, USDOT
  • Created Date: Aug 31 1985 12:00AM