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DESIGN AND DEVELOPMENT OF A ROAD PROFILE GENERATOR

Journal article
Authors Arnold Odrigo
Moustafa El-Gindy
Pär Pettersson
Zuzana Nedelkova
Peter Lindroth
Fredrik Öijer
Published in International Journal of Vehicle Systems Modelling and Testing
Volume 11
Issue 3
Pages 217-233
ISSN 1745-6436
Publication year 2016
Published at Department of Mathematical Sciences, Mathematics
Pages 217-233
Language en
Links dx.doi.org/10.1504/IJVSMT.2016.1000...
Keywords road profile; curvature; truck; topography; roughness; vehicle simulation
Subject categories Transport Systems and Logistics, Applied Mechanics, Vehicle Engineering

Abstract

Ride comfort, fuel consumption and vehicle dynamics are of great importance in vehicle design, development and testing. For this reason, a method of generating a random road profile in three-dimensional space is explored. This is done by combining established mathematical theories of defining road curvature, topography and surface roughness. Though the generated profile is random by nature, its most important aforementioned characteristics are controlled using guidelines and parameters from real roads. Examples of these are the Volvo Global Transport Application (GTA) as well as the International Organization for Standardization (ISO). With the use of MATLAB to develop the program, statistical distributions and probability models are employed for generating the variations in both topography and curviness of the road. Topography is implemented in percent elevation gradients, while clothoid spirals are employed for creating a natural road curvature using tabulated road statistics. Finally, surface roughness will be defined through the use of standardised power spectral density values of ISO roughness classifications. The proposed road generator program creates a road which is independent of the vehicle itself, which is important to compare different vehicles or vehicle designs for same transport task. This is important to create a universally-compatible road profile for several tests. The road profiles will aid in various tests as required throughout the entire automotive industry.

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