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Research and Simulation of Vehicle Lateral Stability Control Based on Fuzzy PID Control

Author: WangCui
Tutor: WuYiHu
School: Changsha University of Science and Technology
Course: Vehicle Operation Engineering
Keywords: vehicle lateral stability control dynamics model fuzzy-PID control yaw moment yaw rate sideslip angle
CLC: U461.6
Type: Master's thesis
Year: 2009
Downloads: 351
Quote: 4
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Abstract


Vehicle lateral stability control is an important performance of the vehicles at high speed. At the same time, vehicle lateral stability control system can prevent the sudden turn occurrence of vehicles which improves the operational stability of them under limit working conditions. When a high speed vehicle is running across a road, with the great centrifugal force, it will generate lateral oscillation. Thus, the tires must provide adequate vertical and lateral force to ensure the vehicles achieve the scheduled turning track. Based on the domestic and foreign present study of the stability control, this paper utilizes fuzzy PID control theory to research the simulation of the vehicle lateral stability control. It is a good tactics to the future development of the actual system.In this paper, it has established a eight-degree freedom vehicle model, including vehicle system model, tire model, brake system model, driving system model and has the simulation analysis and verification of the models, thus it can provide a correct vehicle model to the study of the vehicle lateral stability control. Secondly, it analysis the lateral stability of vehicles and establishes the vehicle turning reference model under ideal state, meanwhile, it studies the law of vehicles under high-speed turning condition and put forward that we can change the lateral oscillation of vehicles to improve the control strategy condition of them under traveling limit working condition. Afterwards, by analyzing the strong non-linear performance of the vehicle models, as well as the large change of the vehicle motion parameters when they are under high-speed turning condition, it adopt the fuzzy PID control method to design the parameter self-adaptive fuzzy PID controller which has a stronger robustness. Base on this, it designs the lateral stability control system of vehicles under high speed condition and has simulated the working condition. The simulation results show that vehicle with fuzzy PID control has better robustness and adaptive ability to the ones only with ABS control. So it can efficiently control the vehicle in more stable state; finally, this method is reasonable and effective in the control of vehicle lateral stability performance.

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CLC: > Transportation > Road transport > Automotive Engineering > Car theory > Vehicle handling and stability
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