The Research On Semi-physical Simulation Of Throttle Control System Based On DSPACE

Compared with the traditional mechanical throttle, the electronic throttle has more advantages. The electronic throttle system can sense the motion from the driver and obtain the current situation of the car, and then figure out the correct throttle position. So the dynamic performance and fuel economy can be improved. Furthermore, to realize some advanced functions, such as ABS,ASR and CCS, the electronic throttle was necessary. Those was helpful to the security and driving comfort of car. In this dissertation, the electronic throttle control system was researched and to test the effects of the control methods the rapid control prototyping experiment was designed. The main work and conclusions are as follows:1)Analyzed the basic structure and control principle. Researched three kinds of non—linear characteristics Established the mathematical model, which includes the mechanical model and the actuator model, of electronic throttle control system.2)Identified the parameters of the electronic throttle control system through the experiments. The output voltages of the throttle position sensors are calibrated. The results show that the outputs of the two redundant sensors are complementary so that the sum of the two output signals equal the supply voltage.3)In order to control the throttle, three control methods PID control, fuzzy control, sliding mode control are designed. Based on the Matlab/Simulink, the simulation model of the electronic throttle control system has been developed. The results of the simulation show that the sliding mode control method can exactly control the throttle position, while the PID control and fuzzy control work not well.4)Using dSPACE software and instruments, the rapid control prototype experiment of the system has been conducted. The results of the experiment validated the rationality and superiority of the sliding mode control method to control the throttle.