Sliding Mode Control And Experimental Platform Of Automotive Electronic Throttle

Traditional automobile throttle is connected with the accelerator pedal through mechanical mechanism. However, there are big limitations. As the constant progress of science and technology, many advantages of electronic throttle are becoming the development trend in the future. The original mechanical is replaced by electronic device in the automotive electronic throttle, which realizes the accurate control. It reduces the pollution of the environment, and improves the driving safety and comfort at the same time. However, the electronic throttle has nonlinearity, uncertainty and the unknown interference complex features, such as how to design good control method based on the complex characteristics of throttle system, which has become the attention problems. Because of the control difficulty of electronic throttle, the sliding mode control method is studied and the corresponding experimental platform is developed. The main content is shown as follows:The automotive electronic throttle control system is analyzed, and its structure and function of each part are introduced. With the throttle dc motor, reset spring, friction and instrument, dc experiment, literature and so on, the key parameters is determined. Through the instrument measurement, dc experiment, literature and so on, the key parameters is determined and an accurate mathematical model is established.PID and sliding mode control algorithm are selected to control the electronic throttle control system. PID algorithm is analyzed in actual application of single chip microcomputer,and the PID controller of electronic throttle control system is given. The sliding mode algorithm is analyzed in actual application of single chip microcomputer. The sliding mode controller is presented according to the established mathematical model.Atmel16-A 8-bit microcontroller is utilized as the controller. BOSCH of DV-E5 throttle is utilized as control object. With the gas pedal, motor drives, PC machine, and device structures, the automobile throttle hardware experiment platform is established. The hardware design and software design of the control system is completed. The algorithm by C language is written in the single chip microcomputer controller, and the PC monitor interface was designed by LABVIEW.Electronic throttle is experimented in the physical platform based on accurate mathematical model. Experimental results show that the controller which uses incremental PID has a large amount of overshoot in the closing stage of the electronic throttle system. The controller which uses sliding mode almost has no overshoot phenomenon, and the throttle can track the accelerator pedal quickly and accurately. The control method proposed in this research has very high practical value for the automobile electric industry.