| Since the advent of electronic throttle technology last century,many advanced engine applications of high middle-grade cars has gradually began.Because of automobile fuel economy and reduce exhaust emissions can effectively improve,implement the flexible control of the car,so the prospect of its application is more and more widely.But as a result of electronic throttle mechanical system has strong non-linear factors,this makes the accurate control of electronic throttle is difficult.In this thesis,in view of the electronic throttle to study the nonlinear control problem,for the electronic throttle application in automatic mechanical variable speed drive system to lay the foundation.In this thesis,the main work content is as follows:The development of automotive electronic control technology are reviewed,and then from the engine EFI system origin and development of the electronic throttle and current products.The principle of electronic throttle control system are analyzed,the structure and the nonlinear factors in mechanical systems and their respective features,setting the key parameters of electronic throttle.Established the mathematical model of the electronic throttle control system,and uses the three control methods:PID control,based on the theory of nonlinear control,variable structure sliding mode control and robust control,three kinds of controller was designed and used in the electronic throttle control.Using Matlab/Simulink toolbox electronic throttle control system simulation model is established,with the three kinds of controller are designed for four of the opening of the target signal(constant signal and sine signal,step signal and linear signal)are simulated,the simulation results show that the sliding mode control method and robust control method has satisfactory control effect.The system makes a brief introduction,including electronic throttle hardware configuration and software environment settings.The contents of the project summary and the prospect of further. |
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