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Control and Simulation of Electric Power Steering System for Automobile

Author: SuiTao
Tutor: YangYing
School: Northeastern University
Course: Vehicle Engineering
Keywords: Electric power steering system (EPS) Co-simulation (ADAMS / Simulink) Boost curve Fuzzy PD control Compensation control
CLC: U463.4
Type: Master's thesis
Year: 2008
Downloads: 202
Quote: 1
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Abstract


Automotive Electric Power Steering System (EPS) is developed in recent years as a new steering system , save fuel , reduce weight , improve active safety , is conducive to environmental protection , such as a series of advantages , and is gradually replacing the traditional hydraulic power steering has become one of the focus of the world 's automotive technology development . The rapid improvement in computer performance and the rapid development of virtual prototype simulation technology to provide the necessary conditions for the in-depth study of the electric power steering technology . ADAMS is the world 's most widely used mechanical system dynamics simulation analysis software . This article is based on ADAMS software , vehicle equipment EPS system multi-body dynamics virtual prototype model simulation control analysis . First , the EPS system structure , working principle , characteristics , development, and the status quo . ADAMS / Car module vehicle equipment EPS system multi-body dynamics model , the model includes front / rear suspension , steering system , front and rear wheels , road spectrum , the other in the steering shaft increases the help torque simplified model to simulate the role of the EPS system booster . Study the characteristics of the ideal form of the EPS system booster with the basic characteristics of parameters , a comparative analysis of the impact of the different forms of help curve parameters . Built a prototype model , determine the the induction type booster characteristic curve of a speed , the simulation results proved that the EPS have a significant role in improving the car at low speed steering portability aspects . Fuzzy PD control motor current control , achieve adaptive . ADAMS / Controls co-simulation method , compensation control strategy of the EPS system in MATLAB / Simulink control model , ADAMS mechanical system model combined mechatronics the joint simulation analysis . The simulation results proved that the process of moving on wet slippery roads , wide-angle quick steering to help in yaw compensation can improve the stability of the car ; applied back to being back in the car at low speed steering positive compensation can improve vehicle friction torque resulting from back positive insufficient. Finally, by simplifying the model using the equation of state in Simulink simulation, comparing the simulation results with co-simulation results prove a more realistic and accurate the joint simulation results for complex systems .

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CLC: > Transportation > Road transport > Automotive Engineering > Automotive structural components > Steering system
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