The Fuzzy-Pid Control Of Off-Road Vehicle Steering System

Electro-hydraulic power steering system is developed on the basis of hydraulic power steering system. Compared with the traditional steering system with saving energy, good sense and so on. Steer-by-wire system, the abolition of the steering wheel and steering wheel of the mechanical connection between the devices. To rid of the traditional steering system of the disadvantages and other systems to facilitate integrated, unified and coordinated control.In this paper,electro-hydraulic power steering system and steer-by-wire system, the structure and working principle of the analysis, in the understanding of intelligent control methods based on the lessons at home and abroad advanced ideas on the electro-hydraulic power steering system to improve and achieve a types of hydraulic-driven, electronically controlled power steering system.First of all, according to Ackerman theoretical shift characteristics, the use of least-squares method for structural optimization of steering trapezoid. The use of Pro/Engineer to establish the various parts of steering system model, and the establishment of mathematical model of steering system. In-depth analysis of system mathematical model, based on the use of MATLAB/Simulink steering response curve of the fuzzy PID simulation. Using Pro/E model for the establishment of steering trapezoid double, three-dimensional model will be imported into the mechanical system dynamics simulation analysis software to generate steering system ADAMS virtual prototype, and then use ADAMS to AMESIM with the steering system is designed to conduct joint simulation analysis.Finally, set up in accordance with the actual conditions of the power steering system performance testing platform, the pressure on the different systems, different load testing of the tracking and analysis. Experiments confirmed that the research power steering system of the correctness and feasibility of the theory and experiment is expected to meet the requirements.