Electronic Throttle Mathematical Modeling And Position Tracking Control

The rapid development of the automotive industry has brought problems such as energy consumption and environmental pollution.To improve the negative impact of automobiles,countries have formulated a series of bills and increased capital investment in automotive technology.The engine system is the power source part of the car.Improving the engine technology is of great significance for improving the car’s power performance and reducing emissions.It is also a research hotspot in the field of automotive technology.As a key part of the automobile engine system,the electronic throttle is mainly used to control the air intake of the engine cylinder.The electronic throttle control strategy is to change the air intake of the engine cylinder according to the operating conditions of the car to provide the best air-fuel ratio.Designing a stable and effective throttle control strategy is of great significance to the vehicle’s fuel economy,driving performance,and solving exhaust emissions.Aiming at the nonlinear problem in electronic throttle control,this thesis firstly models the electronic throttle system,analyzes the deficiencies of PID control,and finally designs a fuzzy PID controller and an adaptive PID controller.The research content and results of this article are as follows:(1)This thesis analyzed the structure and working principle of the electronic throttle valve,discussed the nonlinear problems in the electronic throttle valve system,and established the mathematical model of the electronic throttle valve control system by using the knowledge of electromechanics and dynamics.(2)Aiming at the opening control of the electronic throttle system,the classic PID control theory is first introduced,and the control performance problems of the PID controller when dealing with the nonlinear factors in the electronic throttle system are analyzed.In order to improve the shortcomings of the PID controller in the electronic throttle control,a fuzzy PID controller was first designed.Considering the difficulty of establishing fuzzy rules in the fuzzy PID control,an adaptive PID controller with a feedforward link was designed and carried out Matlab simulation verification.(3)In order to complete the experimental verification,Lab Windows/CVI was used to build an electronic throttle control performance test platform.Comparing PID control and fuzzy PID control two kinds of controller comparison experiments,including electronic throttle opening step response experiment and sinusoidal tracking experiment.Experimental results show that the fuzzy PID controller is superior to the classic PID controller in response time and system overshoot.