Research On Performance Test And Control Of Light Truck Electronic Throttle

Over the past few decades,with the oil crisis and the increasing problem of environmental pollution,saving oil to slow down the rate of oil consumption and protecting the environment has gradually been widely valued by all sectors of society.Automobile has also become an indispensable means of transportation for people to travel and transport goods,and automobile consumption of oil in human social activities has accounted for a considerable proportion,and China's market car possession increased year by year.Under the condition of ensuring the power to meet the demand,in order to improve the fuel consumption rate of automobile,improve the economy of automobile as much as possible,and reduce the pollution of exhaust gas from automobile to the environment,the automobile industry takes into account the use of electronic throttle instead of the traditional mechanical pull rod throttle,which greatly improves the control precision and response speed of throttle valve opening.It effectively improves the control precision of engine to air-fuel ratio and improves the emission performance of engine.With the improvement of China's economic level and the advancement of urbanization,the traffic volume of goods in cities has increased,and the demand for light trucks has soared.In order to further improve the emission performance of the engine,it is chosen to study the electronic throttle of light truck as the object.The research content of this paper is mainly divided into the following aspects: Firstly,taking the electronic throttle as the research object,on the basis of analyzing its working principle and structural characteristics,the electromechanical model of nonlinear dynamic system of electronic throttle is established,combined with the classical PID control strategy commonly used in industry,but the PID control algorithm has strong applicability to the linear control system,Electronic throttle is a typical nonlinear system,so the problem of slow response speed and low steady-state precision is used in PID control algorithm.Because the immune feedback algorithm has the characteristics of fast response speed,in order to improve the response characteristics of electronic throttle control system,the immune feedback control strategy of Intelligent control algorithm is designed in this paper.Based on the sliding mode control theory,the applicability of the nonlinear control system is strong,in order to shorten the convergence time of the control system and improve the steady state accuracy,this paper designs the inverse step control strategy of finite time convergence combined with the finite time convergence sliding mode function and the inverse step theory,and three control strategies after theoretical analysis of the design of the corresponding controller,through the use of MATLAB/Simulink The simulation results of three kinds of control strategies are simulated and analyzed by Simulink software,and the simulation results show that all three control strategies can meet the parametric evaluation index of electronic throttle,among which the finite time convergent reverse step control strategy has the fastest response speed,the highest steady-state precision,the strongest dynamic response following ability,and strong adaptability to different load conditions.Finally,the experimental performance test and analysis of PID control algorithm are introduced in the Loop simulation experiment platform.Experimental results show that the PID control strategy can basically meet the requirements of basic parametric evaluation indexes such as steady-state accuracy,response speed,dynamic accuracy and signal response compliance of electronic throttle response performance,and lay a foundation for the study of electronic throttle control strategy.