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.
Massachusetts Institute of TechnologyDepartment of Mechanical Engineering
Cambridge, MA United States 02139
Department of TransportationOffice of University Research, 1200 New Jersey Avenue, SE
Washington, DC United States 20590
- Hedrick, J Karl
- Wormley, D N
- Buzan, F
- Celniker, G
- Partridge, M
- Publication Date: 1981-10-25
- Pagination: 162 p.
- TRT Terms: Active suspension systems; High speed rail; Mathematical models; Passenger cars; Ride quality; Sensors; Suspension systems; Vehicle design
- Identifier Terms: U.S. Department of Transportation
- Uncontrolled Terms: Lateral dynamics
- Old TRIS Terms: Ost university research; Passenger car design
- Subject Areas: Design; Public Transportation; Vehicles and Equipment;
- 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