A Method to Quantify Vehicle Dynamics and Deformation for Vehicle Rollover Tests Using Camera-Matching Video Analysis

2008 ◽  
Vol 1 (1) ◽  
pp. 301-317 ◽  
Author(s):  
Nathan A. Rose ◽  
William T.C. Neale ◽  
Stephen J. Fenton ◽  
David Hessel ◽  
Robert W. McCoy ◽  
...  
Keyword(s):  
Video Analysis ◽  
Vehicle Dynamics ◽  
Vehicle Rollover

scholarly journals Risk Assessment of Rollover and Skidding due to Pavement Roughness and Differential Settlement for Enhancing Transportation Safety

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Lu Sun ◽  
Luchuan Chen ◽  
Yanna Yin ◽  
Yao Tian ◽  
Xuanyu Zhang
Keyword(s):  
Vehicle Dynamics ◽  
Safety Margin ◽  
Differential Settlement ◽  
Transportation Safety ◽  
Lane Changing ◽  
Pavement Maintenance ◽  
Pavement Roughness ◽  
Vehicle Rollover ◽  
Surrogate Measures ◽  
General Method

In this paper, a closed-loop simulation of vehicle dynamics in CarSim is utilized as surrogate measures to study the effect of pavement roughness and differential settlement on risk of vehicle rollover and skidding. It is found that the influence of pavement roughness on vehicle rollover is significant and the influence of pavement roughness on vehicle skidding is insignificant. The influence of pavement roughness of grade A and B on safety margin of vehicle rollover can be negligible. Pavement roughness of grade C and D significantly reduces the safety margin of vehicle rollover. A 5 cm settlement difference on pavement reduces the safety margin of vehicle skidding on a good road. When the settlement difference is 5 cm, the vehicle rollover and skidding are greatly affected by the lane-changing speed. It provides an effective and general method based on vehicle dynamics for studying transportation safety as well as for setting up criteria for pavement maintenance.

Vehicle Dynamic Simulation for Reconstruction of Rollover Crashes

2006 ◽  
Author(s):  
Riaz A. Sayed ◽  
Pierre Delaigue ◽  
Azim Eskandarian ◽  
Kennerely Digges
Keyword(s):  
Computer Simulation ◽  
Vehicle Dynamics ◽  
Real Life ◽  
Accident Analysis ◽  
Complex Phenomenon ◽  
Vehicle Dynamic ◽  
Vehicle Rollover ◽  
Evidence Analysis ◽  
Vehicle Dynamic Simulation ◽  
3D Computer Simulation

Vehicle rollover crashes are the most severe in terms of occupant's fatalities and injuries. On average rollover crashes are responsible for more then 10,000 fatalities annually. Vehicle rollover is a very complex phenomenon. Simple static analysis and evidence analysis may not be sufficient to provide insight on the vehicle dynamic behavior during the pre-roll phase i.e. from the point of initiation of the crash to the beginning of the first airborne phase. 3D computer simulation provides one of the most comprehensive tools in accident analysis and reconstruction. The main objective of this research was to obtain accurate vehicle pre roll dynamics data in real life rollover crashes using commercially available vehicle dynamics and simulation programs.

Some examples of pilot/vehicle dynamics identified from flight test records

1970 ◽  
Author(s):  
Rodney C. Wingrove ◽  
Frederick G. Edwards ◽  
Armando E. Lopez
Keyword(s):  
Vehicle Dynamics ◽  
Flight Test

A Modified Dugoff Tire Model for Combined-slip Forces

2010 ◽  
Vol 38 (3) ◽  
pp. 228-244 ◽  
Author(s):  
Nenggen Ding ◽  
Saied Taheri
Keyword(s):  
Vehicle Dynamics ◽  
Tire Model ◽  
Magic Formula ◽  
Model Based ◽  
Proposed Model ◽  
Road Friction ◽  
On Line ◽  
Double Lane Change ◽  
Tire Forces ◽  
Tire Models

Abstract Easy-to-use tire models for vehicle dynamics have been persistently studied for such applications as control design and model-based on-line estimation. This paper proposes a modified combined-slip tire model based on Dugoff tire. The proposed model takes emphasis on less time consumption for calculation and uses a minimum set of parameters to express tire forces. Modification of Dugoff tire model is made on two aspects: one is taking different tire/road friction coefficients for different magnitudes of slip and the other is employing the concept of friction ellipse. The proposed model is evaluated by comparison with the LuGre tire model. Although there are some discrepancies between the two models, the proposed combined-slip model is generally acceptable due to its simplicity and easiness to use. Extracting parameters from the coefficients of a Magic Formula tire model based on measured tire data, the proposed model is further evaluated by conducting a double lane change maneuver, and simulation results show that the trajectory using the proposed tire model is closer to that using the Magic Formula tire model than Dugoff tire model.

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