This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Method for the Characterization of Off-Road Terrain Severity
Technical Paper
2006-01-3498
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Highway and roadway surface measurement is a practice that has been ongoing for decades now. This sort of measurement is intended to ensure a safe level of road perturbances. The measurement may be conducted by a slow moving apparatus directly measuring the elevation of the road, at varying distance intervals, to obtain a road profile, with varying degrees of resolution. An alternate means is to measure the surface roughness at highway speeds using accelerometers coupled with high speed distance measurements, such as laser sensors. Vehicles out rigged with such a system are termed inertial profilers. This type of inertial measurement provides a sort of filtered roadway profile. Much research has been conducted on the analysis of highway roughness, and the associated metrics involved.
In many instances, it is desirable to maintain an off-road course such that the course will provide sufficient challenges to a vehicle during durability testing. Such situations would require an off-road terrain measurement system. A system has been developed that aims to take inertial measurements in non-paved situations. Off-road analysis provides new challenges to surface measurement. The surfaces are generally even more time-varying then paved roads, they provide greater vehicle excitations, it is difficult to maintain a constant speed when traveling over extreme terrain, and the dynamics of the suspension will be excited well beyond the points of small angle approximations and linearity assumptions. This paper will assess and compare some metrics used previously in highway applications, and adopt them to off-road conditions suitable for use in an off-road terrain severity measurement system. Further, this paper will look into new metrics to describe off road terrain for the purpose of maintaining off-road courses that are used for durability testing of all-terrain vehicles.
Recommended Content
| Technical Paper | A Mathematical Model for Exhaust System Vibrations Caused by Road Surface Inputs |
| Technical Paper | Double A-Arm Suspension for Cross-Country Racing |
| Journal Article | Terrain Profile Estimation for use in Suspension Simulation Testing |
Authors
- Grant A. Malmedahl - Center for Automotive Research, The Ohio State University
- Nicholas Dembski - Center for Automotive Research, The Ohio State University
- Giorgio Rizzoni - Center for Automotive Research, The Ohio State University
- Ahmed Soliman - Center for Automotive Research, The Ohio State University
- Lorenzo Disarò - Politecnico di Milano
Topic
Citation
Malmedahl, G., Dembski, N., Rizzoni, G., Soliman, A. et al., "A Method for the Characterization of Off-Road Terrain Severity," SAE Technical Paper 2006-01-3498, 2006, https://doi.org/10.4271/2006-01-3498.Also In
References
- Carey, W. N. Irick, P. E. “The Pavement Serviceability Performance Concept,” Bulletin 250 Highway Research Board Washington, DC 1960
- Spangler, E. B. Kelly, W. J. “GMR Road Profilometer-A Method for Measuring Road Profile,” Record 121 Highway Research Board Washington, D.C. 1966
- Dodds, C. J. Robson, J. D. 1973 “The Description of Road Surface Roughness,” Journal of Sound and Vibration 31 2 175 183
- Stark, Henry Woods John W. Probability, Random Processes, and Estimation Theory for Engineers Prentice-Hall Englewood Cliffs, NJ 1986
- Bendat, Julius S. Piersol Allan G. Random Data: Analysis and Measurement Procedures 3rd ed. John Wiley and sons, Inc. New York, NY 2000
- “Standard Practices for Simulating Vehicular Responses to Longitudinal Profiles of Traveled Surfaces,” 2001 ASTM E1170-97
- Sayers, M. W. “On the Calculation of International Roughness Index from Longitudinal Road Profile.” Transportation Research Record 1501 1995 1 12
- Sayers, M. W. Gillespie T. D. Queiroz C. International Experiment to establish correlations and Standard Calibration Methods for Road Roughness Measurements World Bank Technical Paper 45 World Bank Washington, D.C. 1986
- Sayers, M. W. Gillespie T. D. Paterson W. D. Guidelines for the Conduct and Calibration of Road Roughness Measurements World Bank Technical Paper 46 World Bank Washington, D.C. 1986
- Sayers, M. W. “Two Quarter-Car Models for Defining Road Roughness: IRI and HRI.” Transportation Research Record 1215 1989 165 172
- Sayers, M. W. Karamihas S. M. “Estimation of Rideability by Analyzing Longitudinal Road Profile.” Transportation Research Record 1536 1996 110 116
- Spangler, E. B. Kelly, W. J. “Development and Evaluation of the Ride Number Concept,” Vehicle Road Interaction , ASTM STP 1225 Kulakowski B.T. American Society for Testing and Materials Philadelphia, PA 1994 135 149
- “Standard Practice for Computing Ride Number of Roads from Longitudinal Profile Measurements Made by an Inertial Profile Measuring Device,” 2003 ASTM E1489-98
- International Organization for Standardization 1997 ISO Mechanical vibration and shock-Evaluation of whole-body vibration Part 1: General Requirements
- Sayers, Michael W. Karamihas. Steven M. 1998 The Little Book of Profiling The University of Michigan Transportation Research Institute (UMTRI), The Regents of the University of Michigan
- Pong, Meau-Fuh Wambold James C. “Evaluation of Computation Methods for Accelerometer-Established Inertial Profiling Reference Systems.” Transportation Research Record 1348 1992 8 17
- “Standard Practice for Computing International Roughness Index of Roads from Longitudinal Profile Measurements,” 2003 ASTM E1926-98
- Abernethy, C. N. et al. “Maximum Decceleration and Jerk Levels That Allow Retention of Unrestrained, Seated Transit Passenegers.” Transportation Research Record 774 1980 45 51
- Papagiannakis, A.T. 1997 “The Need for a New Pavement Roughness Index; RIDE,” SAE Paper 973267 Society of Automotive Engineers, Inc. Warrendale, PA
- Bekker, M.G. Introduction to Terrain Vehicle Systems The University of Michigan Press Ann Arbor, MI 1969