الفهرس 
CHAPTER (1) INTRODUCTION AND LITERATURE REVIEWOnly 14 pages are availabe for public view
 |  | from | 97 |  |  |
| | | from | 97 | | |
Abstract
This thesis is concerned with the effects of the utilizing the front wheels independent steering system (FWISS) on vehicle turning response, vehicle cornering performance and stability.
The study of the cornering performance of the vehicles concerns with study the steering system, and the most steering system designs are following the basic theory which called Ackermann relation. This relation ignores the vehicle speed and tire slip angles which lead to deviation between the vehicle actual path and the target path. The scope of this work is to minimize this deviation by utilizing the independent steering technology.
An eight degree of freedom vehicle dynamic model was developed to study the vehicle motion in longitudinal, lateral, yaw, roll and the rotational motion for each wheel. Then, the model was validated by comparing the vehicle turning response with response published in works at the same operating conditions.
Moreover, Particle Swarm optimization was developed based on our proposed objective function and optimization criteria to obtain the optimized independent steering angles to minimize the deviations between the actual and the target path. Furthermore, the results demonstrated that there is an improvement in the vehicle turning performance.
On the other hand, two Adaptive Neuro Fuzzy Inference Systems (ANFIS) were implemented to estimate the steering angles independently to optimize the optimization running time.
The ANFIS controllers’ performance were evaluated based on comparing the vehicle turning performance due to its steering angles with the vehicle turning performance due to the optimized steering angles conducted from MATLAB at three random operating conditions. And the results demonstrated the effectiveness of the ANFIS controllers.
Finally, the proposed optimization criteria was validated by comparing the vehicle turning performance based on the MATLAB model with the vehicle turning performance based on CarSim Model. And the results illustrated that the two responses are fairly identical.
In the conclusion, the results show that the effectiveness of utilizing the FWISS based on the optimization criteria and the ANFIS controllers where, there improves the vehicle turning performance and path tracking.