A general model for inferring terrain surface roughness as a root–mean–square to predict vehicle off–road ride quality

Vehicle maximum speed for off–road operations is limited by the absorbed power via vertical acceleration to the driver for a given terrain Root–Mean–Square surface roughness (RMS). RMS calculation requires centimetre–scale terrain elevation data; however, previous work by the authors has shown that RMS can be modelled using a 5–metre terrain profile's Fractal Dimension (FD) and Power Spectral Density (PSD) DC offset. Presented is a study of the effects of surface elevation data resolution on the model. Forty–nine ride courses were down–sampled from 30 centimetre to 0.91, 1.83, 2.74, 3.66, 4.57, 5.49, 6.40, 7.32, and 8.23 metre spacings, and an RMS model at each spacing was generated using linear regression techniques. The effects of data resolution on the RMS model were studied, and a continuous model for RMS as a function of FD and DC offset across elevation data resolutions for up to 7 metre sample spacing was developed. Results of the model's use in predicting off road military vehicle mobility are presented.

• Record URL:
  • https://doi.org/10.1504/IJVD.2014.058481
• Record URL:
  • http://inderscience.metapress.com/link.asp?target=contribution&id=E018VM6905WK5W19
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/14775360
• Supplemental Notes:
  • © 2014 Inderscience Enterprises Ltd.
• Authors:
  • Durst, Phillip J
  • Baylot, Alex
  • McKinley, Burney
  • Mason, George L
• Publication Date: 2014

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 137-152
• Serial:
  • International Journal of Vehicle Design
  • Volume: 64
  • Issue Number: 2-4
  • Publisher: Inderscience Enterprises Limited
  • ISSN: 1477-5360
  • Serial URL: http://www.inderscience.com/jhome.php?jcode=IJVD

Subject/Index Terms

• TRT Terms: All terrain vehicles; Mathematical models; Mathematical prediction; Military vehicles; Power spectra; Ride quality; Roughness; Terrain; Vehicle performance
• Uncontrolled Terms: Root mean square of elevation
• Subject Areas: Design; Highways; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 01505087
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 27 2014 10:45AM