Modern Manufacturing Engineering ›› 2017, Vol. 440 ›› Issue (5): 76-85.doi: 10.16731/j.cnki.1671-3133.2017.05.015

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Electric power steering system dynamic sliding control with the nonlinear disturbance observer

Zou Zuoming   

  1. Sichuan Vocational College of Information Technology,Guangyuan 628017,Sichuan,China
  • Received:2016-04-25 Online:2017-05-20 Published:2018-01-08

Abstract: Considering electric power steering system with 2 DOFs model of vehicle.Established the model of electric power steering system take into account system of friction,bumpy roads and unmolded part of system.Then putting forward a kind of electric power steering dynamic sliding mode control system with disturbance observer.Then willing the system of interference,unmolded part of system as a general system of outside interference.Observable the interference of the system,selected the appropriate parameters of system,then making the observation error index convergence.With the system with disturbance observer.The dynamic surface sliding mode variable structure controller inversion is designed step by step by using Lyapunov stability theory.Avoided the problem of integral expansion compared with the traditional inversion controller,simulating the electric power steering system with 2 DOFs model for vehicle simulation with Matlab /Simulink with the influence of random disturbance of road bumps etc.The simulation results show that the controller under the action of the steering wheel torque in the interference of output is steady,strong robustness.Also it improves the portability of the system.

Key words: electric power steering system, nonlinear disturbance observer, dynamic sliding mode variable structure control

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