Modeling Driver/Vehicle Performance in Emergency Maneuvers

1988 ◽  
Vol 32 (10) ◽  
pp. 573-577
Author(s):  
R. Wade Allen ◽  
Henry T. Szostak ◽  
Theodore J. Rosenthal
Keyword(s):  
Computer Simulation ◽  
Vehicle Dynamics ◽  
Driver Behavior ◽  
Vehicle Performance ◽  
Technical Aspects ◽  
Traffic Conflicts ◽  
Hazard Scenario

The combined performance of the driver and vehicle determine whether accidents result from traffic conflicts, road hazards, etc. This paper describes the driver behavior and hazard scenario aspects of a computer simulation which models both vehicle dynamics and driver steering and braking behavior. The technical aspects of the simulation have previously been published. The issue of how much the driver and vehicle contribute to accident involvement is addressed, and antilock brake evaluation is used as an example.

Design Guidance for Freeway Main-Line Ramp Terminals

2012 ◽  
Vol 2309 (1) ◽  
pp. 48-60 ◽  
Author(s):  
Darren J. Torbic ◽  
Jessica M. Hutton ◽  
Courtney D. Bokenkroger ◽  
Marcus A. Brewer
Keyword(s):  
Field Study ◽  
Driver Behavior ◽  
Main Line ◽  
Behavioral Study ◽  
Crash Analysis ◽  
Vehicle Performance ◽  
Green Book ◽  
Improved Design ◽  
Parallel Acceleration ◽  
Design Guidance

This paper presents the results of a study to develop improved design guidance for freeway main-line ramp terminals on the basis of modern driver behavior and vehicle performance capabilities. The primary steps included a crash analysis, an observational field study, and a driver behavioral study. This research reached several key conclusions, as follows. Vehicle merging speeds tend to be closer to freeway speeds at tapered acceleration lanes than at parallel acceleration lanes. The recommended minimum lengths for acceleration lanes presented in the 2004 edition of AASHTO's A Policy on Geometric Design of Highways and Streets (Green Book) are conservative and, under certain conditions, could be reduced by 15%. In a situation in which a significant volume of trucks uses an entrance ramp, an acceleration lane length that will better accommodate trucks can be derived by using speed–distance curves developed for a range of weight-to-power ratios. The recommended minimum lengths for deceleration lanes presented in the 2004 Green Book are conservative and do not account for deceleration in the freeway. Providing deceleration lanes longer than the minimum values given in the Green Book may promote casual deceleration by exiting drivers. Several potential changes for consideration in the next edition of the Green Book are recommended on the basis of the findings and conclusions of this research.

Development of a Driving Simulator for Virtual Evaluation of Vehicle Dynamics

2010 ◽  
Author(s):  
A. M. Sharaf
Keyword(s):  
Performance Evaluation ◽  
Vehicle Dynamics ◽  
Driving Simulator ◽  
Field Testing ◽  
Vehicle Performance ◽  
Vehicle Simulation ◽  
Virtual Platform ◽  
The Cost ◽  
Vehicle Testing ◽  
Simulation Package

This paper delineates the conceptual algorithms of a driving simulator which is intended for vehicle performance evaluation and to act as a virtual platform for research studies and therefore eliminates the cost and dangerous of field testing. A virtual proving ground for vehicle testing has been devised through which virtual handling, traction and ride tests can be performed. A fully instrumented simulator cabin combining the driver and the vehicle simulation package is developed. Different vehicle configurations are simulated during typical sever manoeuvres which reflects the robustness and fidelity of the devised simulator.

Inverse Wheel Dynamics

2006 ◽  
Author(s):  
V. V. Vantsevich
Keyword(s):  
Angular Velocity ◽  
Power Distribution ◽  
Vehicle Dynamics ◽  
Inverse Dynamics ◽  
Equation Of Motion ◽  
Torque Control ◽  
Vehicle Performance ◽  
Performance Control ◽  
Wheel Torque ◽  
And Performance

Wheel dynamics is a significant component of vehicle dynamics and performance analysis. This paper presents an innovative method of studying wheel dynamics and wheel performance control based on the inverse dynamics formulation of the problem. Such an approach opens up a new way to the optimization and control of both vehicle dynamics and vehicle performance by optimizing and controlling power distribution to the drive wheels. An equation of motion of a wheel is derived first from the wheel power balance equation that makes the equation more general. This equation of motion is considered the basis for studying both direct and inverse wheel dynamics. The development of a control strategy on the basis of the inverse wheel dynamics approach includes wheel torque control that provides a wheel with both the referred angular velocity and rolling radius and also with the required functionals of quality. An algorithm for controlling the angular velocity is presented as the first part in the implementation of the developed strategy of the inverse wheel dynamics/performance control.

Estimating Pacejka (PAC2002) Tire Coefficients for Pneumatic Tires on Soft Soils With Application to BAJA SAE Vehicles

2019 ◽  
Author(s):  
Amanda Saunders ◽  
Darris White ◽  
Marc Compere
Keyword(s):  
Vehicle Dynamics ◽  
Integration Method ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Road Vehicles ◽  
Traction Forces ◽  
Soft Soils ◽  
Vehicle Performance ◽  
Vehicle Simulation ◽  
Stress Integration

Abstract BAJA SAE is an engineering competition that challenges teams to design single-seat all-terrain vehicles that participate in a vast number of events, predominately on soft soils. Efficient performance in the events depends on the traction forces, which are dependent on the mechanical properties of the soil. To accurately model vehicle performance for each event, a model of the tire traction performance is required, and the tire model must be incorporated with a vehicle dynamics simulation. The traction forces at the soil-tire interface can be estimated using the Bekker-Wong stress integration method. However, commercially available vehicle dynamics simulation software, with a focus on on-road vehicles, does not utilize Bekker-Wong parameters. The Pacejka Magic Tire (MT) Formula is a common method for characterizing tire behavior for on-road vehicles. The parameters for the Pacejka MT Formula are usually produced by curve fitting measured tire data. The lack of available measured off-road tire data, as well as the additional variables for off-road tire performance (e.g. soil mechanics), make it difficult for BAJA SAE teams to simulate vehicle performance using commercial vehicle simulation tools. This paper discusses the process and results for estimating traction performance using the Bekker-Wong stress integration method for soft soils and then deriving the Pacejka coefficients based on the Bekker-Wong method. The process will enable teams to use the Pacejka Magic Tire Formula coefficients for simulating vehicle performance for BAJA SAE events, such as the hill climb, (off-road) land maneuverability, tractor pull, etc.

scholarly journals Design and Manufacturing of Electrically Driven ATV for Enhanced Vehicle Performance

2020 ◽  
Vol 9 (3) ◽  
pp. 645-650
Keyword(s):  
Energy Consumption ◽  
Vehicle Dynamics ◽  
Structural Integrity ◽  
Forest Sector ◽  
Clear Understanding ◽  
Vehicle Performance ◽  
Commercial Activities ◽  
Wide Range ◽  
Design And Manufacturing ◽  
Recreational User

This paper aims to produce an Electrical all-terrain vehicle with Smart Driver Kit design which is more durable and comfortable to meet the robust conditions of Defense and Forest Sector, not just recreational user market. The Smart Driver Kit design will take this vehicle experience to a new dimension with valuable information about Energy Consumption, Stealth Mode, Real-time Elevation and Terrain Data. The paper implies the prominence of bringing up innovation in terrain vehicles to cover wide range of market preferably terrain based commercial activities. Clear understanding of Vehicle Dynamics and Automotive Design leads us to the development of a product which would fulfill the consumer expectations sought at every level around the globe. The structural integrity and durability of the vehicle of this vehicle would be an advancement for innovation in All-Terrain Vehicle

Computer Simulation of Driver Behavior

1967 ◽  
Author(s):  
Theodore E. Anderson ◽  
Edwin A. Kidd ◽  
Kenneth R. Laughery
Keyword(s):  
Computer Simulation ◽  
Driver Behavior
Sign in / Sign up

Export Citation Format

Share Document