Establishing Correlation between Torsional and Lateral Stiffness Parameters of BIW and Vehicle Handling Performance

2011 ◽  
Vol 4 (1) ◽  
pp. 22-31 ◽  
Author(s):  
Hari Krishnan M ◽  
N Sreeraj ◽  
C Bhaskar ◽  
G Nagaraju ◽  
R Mugundaram
Keyword(s):  
Lateral Stiffness ◽  
Vehicle Handling ◽  
Handling Performance

A comprehensive active-steering control method for improvement of vehicle handling performance

2017 ◽  
Vol 232 (3) ◽  
pp. 413-425 ◽  
Author(s):  
Weimiao Yang ◽  
Pengpeng Feng ◽  
Jianwu Zhang
Keyword(s):  
Linear System ◽  
Feedback Linearization ◽  
Control Method ◽  
System Control ◽  
Steering Control ◽  
Vehicle Handling ◽  
Handling Performance ◽  
Non Linear ◽  
Tyre Modelling ◽  
Non Linear System

Non-linear system control has always been a difficult point for vehicle stabilization. To improve the vehicle handling performance, a comprehensive active-steering control method is proposed and derived. Different from traditional strategy, this new controller is based on a piecewise tyre modelling ideology combined with feedback linearization controlling method. In the linear region of wheel–terrain contact, vehicle dynamic system turns to be a linear system, an optimal control is designed for the sake of rapid response in tracking desired values. In the non-linear region, where the controlling difficulty always lies in, the tyre lateral force is described by a new polynomial formula model, which is simpler than magic formula model and more accurate than linear model. This new tyre modelling ideology ensures the feasibility of feedback linearization method in non-linear system control. To verify the proposed controller, a numerical seven-degrees-of-freedom vehicle model is built and validated by standard input simulation. Then, simulation under limit conditions, including high friction case and low friction case, are conducted and results are presented and discussed. Compared with optimal controller and free-control method, comprehensive controller has a much more desirable applicability in both cases and greatly improves the vehicle handling performance.

2302 A study of vehicle handling performance on snow road using tire contact pressure analysis

2014 ◽  
Vol 2014.23 (0) ◽  
pp. 83-86
Author(s):  
Takahiro Yokoyama ◽  
Koji hiratsuka ◽  
Rin Watanabe ◽  
Shinya Notomi ◽  
Shigeaki Suzuki
Keyword(s):  
Contact Pressure ◽  
Vehicle Handling ◽  
Handling Performance ◽  
Pressure Analysis

The Use of Accident Data in Studying Vehicle Handling Performance

1975 ◽  
Vol 189 (1) ◽  
pp. 243-258 ◽  
Author(s):  
I. S. Jones
Keyword(s):  
Weight Ratio ◽  
Control Measures ◽  
Lateral Acceleration ◽  
Loss Of Control ◽  
Accident Rate ◽  
Vehicle Handling ◽  
Handling Performance ◽  
Handling Characteristics ◽  
Accident Causation ◽  
Accident Data

A study to establish the relation between vehicle handling performance and accident causation. Since deficiencies in handling are likely to be associated with accidents involving loss of control, measures of handling which are likely to express proneness to loss of control are first suggested; emphasis is placed on simplicity of measurement to allow as many different models of car as possible to be included in the study. Accident rates for the various types of accident which are likely to be influenced by these parameters are then determined by model of car. The effect of other factors, such as variation in driver characteristics between different models of car on these rates is then assessed so that the relation between handling characteristics and accident frequency can be defined. Finally, the relative importance of the various measures of handling suggested are assessed. The results suggest that there is a definite relation between handling performance and accident causation although it is relatively small when compared to driver effects. In explaining the variation in the accident rate between different models of car, driver effects account for as much as 70 per cent; if driver effects are removed from the accident rate then handling parameters explain between 35 and 40 per cent of the remaining variation between models of car. The important parameters appear to be weight, a measure of the change in understeer as a function of lateral acceleration and power to weight ratio.

Identification of Tire Force and Moment (F&M) Characteristics That Improve Combined Slip Handling Performance

2019 ◽  
Vol 47 (1) ◽  
pp. 55-76
Author(s):  
Terence Wei ◽  
Hans Dorfi
Keyword(s):  
Slip Angle ◽  
Vehicle Handling ◽  
Handling Performance ◽  
Tire Force ◽  
Objective Metrics ◽  
Instrumented Vehicle ◽  
Control Forces ◽  
Different Characteristics ◽  
Tire Models ◽  
The Relationship

ABSTRACT Since tires generate the control forces required for the operation of a vehicle, the tire force and moment (F&M) characteristics have to be designed such that the vehicle can easily be kept under driver control under many driving conditions. However, the relationship between F&M characteristics and vehicle handling performance is not well understood for many driving maneuvers. A better understanding of this relationship would thus provide insight into how to improve the matching between tires and vehicles for increased vehicle stability. Building a large number of tires with different characteristics would be too expensive and time consuming, so an investigation using simulations is preferred. However, one problem with simulations is that handling performance cannot be evaluated by a professional driver (subjective metrics), unlike in outdoor tests. A way of evaluating handling performance in simulation through objective metrics is therefore necessary. In this study, the focus is on vehicle handling performance during simultaneous cornering and braking. Desirable F&M metrics were identified using the following process: Handling simulations were validated using instrumented vehicle measurements of handling behavior at outdoor test facilities. An objective handling metric (peak body slip angle) was identified that has high correlation with professional driver ratings (subjective metric) of combined slip handling performance. The objective metric could therefore be used with simulations to predict the professional driver rating. Many virtual tires were generated by changing F&M characteristics of Pacejka tire models. These virtual tires were used in simulations of combined slip handling maneuvers and evaluated for performance using the objective handling metric. By identifying which changes to F&M metrics had high correlation to changes in handling performance, the primary influencing characteristics were determined. These results were also confirmed by looking at the correlation between F&M metrics of actual tires and their subjective ratings.

scholarly journals Development of an EV Drive Torque Control System for Improving Vehicle Handling Performance Through Steering Improvements

2012 ◽  
Vol 5 (1) ◽  
pp. 1-7
Author(s):  
Yuuki Shiozawa ◽  
Yosuke Kobayashi ◽  
Mitsunori Ohta ◽  
Yusuke Kageyama ◽  
Yohei Nakamura ◽  
...  
Keyword(s):  
Control System ◽  
Torque Control ◽  
Vehicle Handling ◽  
Handling Performance ◽  
Drive Torque
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