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Nonlinear Controller Design for Stree-By-Wire Passenger Car

Mosavi Nejad, Iman | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 39684 (58)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Kazemi, Reza
  7. Abstract:
  8. Today safety is one of the major competition factors in automotive industries . The vehicles of today are more and more dependent on electronic systems , for driving safety and ease on control for the driver . Some systems are more or less standard in vehicles on the market , examples of such systems are ABS , ABC , etc. Despite of the effect of these systems on vehicle dynamics ,because they only control longitudinal dynamics and don't receive any feedback from vehicle lateral behavior , now control systems ,named VDC , have been developed and implemented in advanced vehicles. The operation of such systems is as this that in any time instance they evaluate vehicle dynamical behavior. Active Front Steering (AFS ) system is one of the VDC system. The aim of this research is designing the AFS and using the Steer-By-Wire (SBW ) technology with this system. In SBW system the mechanical connection between the driver and the vehicle's front tires is eliminated. Instead ,actuators are positioned at the corners of vehicle and receive inputs from the control module to turn the wheels accordingly. For this purpose we will design three controllers: Yaw Stability Controller , Steering-Wheel Controller and Front-Wheel Controller .The yaw stability controller and the front wheel controller are based on the Sliding mode method and the steering wheel controller is based on the PID method .We will show at the end of this research , the controlled vehicle will have a reasonable behavior in critical conditions and maneuvers and the controller operation will improve perceptibly.
  9. Keywords:
  10. Safety ; Dynamic Control ; Passenger Cars ; Sliding Mode ; Vehicle Dynamics ; Steering System ; Proportional-Integral-Derivative (PID)Control ; Active Front Streering

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