Automotive Electronic Throttle Detector Design Based On STM32

At the end of2012,China produced19.2718million vehicles and sold19.3064millions,respectively securing4.6%and4.3%year-on-year growth rate.Compared with thesame period in2011, the production and sales were increased by3.8%and1.9%respectively. The production and sales broke19million and created a record, which againrefreshed the world record. It has won the first in the world for four consecutive years.Withthe increasing of car ownership in our country and the growing dependence, cars haveinfluenced people’s everyday life more and more.At the same time, higher requirementshave been raised in terms of safety and comfort.This essay firstly analyzes the working principle and basic structure of the electronicthrottle system. The nonlinear factors in the mechanical structure and their respectivecharacteristics are also explained. The mathematical model of electronic throttle and theMATLAB simulation model have been established based on the principle. Then thephysical parameters of the electronic throttle are calibrated. On this basis, I design theintelligent PID controller and establish software and hardware for electronic throttlesystem.Finally, this paper provides an objective analysis and evaluation of results of thecontrol experiment of the detector.In order to study the technology of electronic throttle, simulation method is adopted tocombine with experiment.Before experiment,firstly, the position sensor andaccelerator pedal of the electronic throttle are calibrated,which will ensure anaccuracy control of the open angle of the electronic throttle. Next, verification experimentsof the intelligent PID controller are made,which including the opening of electronic throttlefrom small to big and from big to small. The result of the experiment indicates thatintelligent PID controller can accurately control of the open angle of the electronic throttle.Small system overshoot and dynamic errors could be confirmed with ashort control response time. The designed controller meets the evaluation criteria and thefunctional requirements.It ensures that the detector can accurately detect electronic throttle.