ON-LINE ESTIMATION OF LOCAL ROAD GRADIENT FOR IMPROVED STEADY STATE SUSPENSION DEFLECTION CONTROL

The paper outlines a systematic method for controlling suspension deflection offset and drift, that can arise when an actively sprung vehicle encounters a constant gradient or a long wavelength road surface undulation. A brief review of the problem is given and it is shown that the inherent filtering effects of a standard Kalman observer does not sufficiently address the issue. An expanded Kalman filter is introduced to estimate the underlying vertical road velocity, and this is applied within a linear state feedback controller. Its effect on suspension performance is shown to be advantageous when compared with simpler state feedback and integral control techniques. For the covering abstract see ITRD E117109.

• Corporate Authors:

  SWETS & ZEITLINGER B.V.

  LISSE,   Netherlands 
• Authors:
  • FAIRGRIEVE, A
  • Gordon, T J
• Conference:
  • THE DYNAMICS OF VEHICLES ON ROADS AND ON TRACKS - SUPPLEMENT TO VEHICLE SYSTEM DYNAMICS, VOLUME 33. PROCEEDINGS OF THE 16TH IAVSD SYMPOSIUM HELD IN PRETORIA, SOUTH AFRICA, AUGUST 30 - SEPTEMBER 3, 1999
• Publication Date: 2000

Language

• English

Media Info

• Features: References;
• Pagination: p. 590-603

Subject/Index Terms

• TRT Terms: Conferences; Deflection; Dynamics; Highway grades; Highways; Linear systems; Mathematical models; Slopes; Suspension systems
• ITRD Terms: 8525: Conference; 5586: Deflection; 5473: Dynamics; 2806: Gradient; 2755: Highway; 6484: Linear system; 6473: Mathematical model; 1329: Suspension (veh)
• Subject Areas: Data and Information Technology; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00943114
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Jun 11 2003 12:00AM