Modelling of a semi-active hydropneumatic spring–damper unit

The mathematical modelling of a suspension unit is considered. The unit comprises a hydraulic cylinder connecting the vehicle body to the unsprung mass, two nitrogen-filled accumulator springs and two damper ports. The model takes the deflection rate as input and iteratively employs simple fluid dynamics theory to calculate the flow-rates from each accumulator to thecylinder. It calculates the pressure in the accumulators by time-integrating the flow rates to determine the gas volumes and then invoking ideal gas theory. This renders the dynamic force of the unit as output. Model predictions are compared with measurements. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/14775360
• Authors:
  • THERON, N J
  • ELS, P S
• Publication Date: 2007

Language

• English

Media Info

• Pagination: 501-521
• Serial:
  • International Journal of Vehicle Design
  • Volume: 45
  • Issue Number: 4
  • Publisher: Inderscience Enterprises Limited
  • ISSN: 1477-5360
  • Serial URL: http://www.inderscience.com/jhome.php?jcode=IJVD

Subject/Index Terms

• TRT Terms: Damping (Physics); Deflection; Dynamics; Flow; Gases; Hydrologic phenomena; Mathematical models; Simulation; Suspension systems; Vehicles
• ITRD Terms: 5559: Damping; 5586: Deflection; 4323: Discharge (flow); 5473: Dynamics; 6734: Gas; 6473: Mathematical model; 9103: Simulation; 1329: Suspension (veh); 1255: Vehicle
• Subject Areas: Hydraulics and Hydrology; Vehicles and Equipment; I90: Vehicles; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 01081748
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Nov 29 2007 1:23PM