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Title:

Multi-body Vehicle Dynamics Simulation Based on Measured 3-D Terrain Data
Cover of Multi-body Vehicle Dynamics Simulation Based on Measured 3-D Terrain Data

Accession Number:

01506381

Record Type:

Component

Abstract:

Due to its influence on suspension deflection, vehicle rollover, and tire normal forces, terrain modeling is an important factor when performing vehicle dynamics simulations. There has been significant research on 2D (longitudinal) road profile modeling for purposes of measuring ride quality, road roughness and condition, and evaluating suspension design. But there has been little study of 3D road geometry modeling, which may be useful for vehicle rollover and banked-road handling analysis. This study focuses on 3D terrain modeling for the purpose of vehicle dynamics simulation. Terrain data was collected using a LIDAR sensor mounted on an instrumented vehicle. This data was used to generate a 3D road representation that was imported into a multi-body CarSim vehicle simulation. A challenge with the full 3D representation was to determine the level of signal filtering necessary to smooth the raw LIDAR point cloud for an appropriate road representation. To find the optimal filtering, an iterative process was used that minimizes RMS error in roll and pitch by comparing in-vehicle measurements to simulated vehicle responses. At a particular spatial filtering frequency, a good match was obtained between simulations and measured vehicle responses. The contribution of terrain to vehicle roll dynamics was also studied by comparing simulated traversal of roads with and without vertical terrain features.

Supplemental Notes:

Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

Monograph Accession #:

01501394

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Varunjikar, Tejas
Vemulapalli, Pramod
Brennan, Sean N

Pagination:

10p

Publication Date:

2011

Conference:

3rd International Conference on Road Safety and Simulation

Location: Indianapolis Indiana, United States
Date: 2011-9-14 to 2011-9-16
Sponsors: Purdue University; Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References

Identifier Terms:

Carsim (Computer program)

Uncontrolled Terms:

Road profile

Subject Areas:

Highways; Safety and Human Factors; I80: Accident Studies

Files:

TRIS, TRB, ATRI

Created Date:

Jan 31 2014 10:23AM