NEW RESULTS ON AN ELECTROPNEUMATIC ACTIVE SEAT SUSPENSION SYSTEM

A vibration control system with an air spring as the actuator and proportional electropneumatic control has been developed at the Institute of Materials and Machine Mechanics, Bratislava. As the electropneumatic transducer, a proportional pressure control valve is used in contrast to the previously used proportional flow control valve. The vibration control is facilitated by a combination of a 'sky hook' feedback loop and a feedforward loop working on the so-called 'sky cloud' principle, compensating base vertical vibration. Good agreement between simulation results and measurement on a laboratory dummy system was observed. The dummy system was also subjected to narrow-bank random excitation, prescribed for standardized laboratory tests of driver's seats. The improvement in driver's seat vibration control properties owing to the feedforward vibration compensation is 2.5-fold, ie by 8 dB in comparison with'sky hook' feedback damping only. The system could be used for vibration control in automotive applications, especially for vehicles with an unsprung chassis (earth-moving machines, wheeled tractors) and in the heavy vehicles sector. (A)

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  PROFESSIONAL ENGINEERING PUBLICATIONS LTD

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• Authors:
  • STEIN, G J
• Publication Date: 2000

Language

• English

Media Info

• Features: References;
• Pagination: p. 533-44
• Serial:
  • Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
  • Volume: 214
  • Issue Number: D5
  • Publisher: Sage Publications Limited
  • ISSN: 0954-4070
  • EISSN: 2041-2991
  • Serial URL: http://pid.sagepub.com/content/current

Subject/Index Terms

• TRT Terms: Compressed air; Seats; Simulation; Suspension systems; Vibration
• ITRD Terms: 3814: Compressed air; 1388: Seat (veh); 9103: Simulation; 1329: Suspension (veh); 5558: Vibration
• Subject Areas: Vehicles and Equipment;

Filing Info

• Accession Number: 00799818
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Oct 6 2000 12:00AM