Improved Design And Its Application On The Control System Of Simulate Locomotive

With the vigorous development of urban rail transit of China, the demand for talents of urban rail transit specialty is growing increasingly. At present, relevant practitioners still stay at the theoretical learning and cognition practice level and lack of operation training in the simulation environment. The urban rail transit laboratory of our school provides an operational platform integrating teaching and training for students of urban rail transit specialty and relevant practitioners.This paper focuses on the control systeom of simulate locomotive in simulation platform of train in safe opertation. This system is designed by Train-Trainsit laboratory Of Southwest Jiaotong University-E’mei. Main work is to analy the control systeim of existing simulate locomotive in the laboratory and to identify the problems of low processing speed, its great battery consumption, heavy boby weight and poor communication effect, all of which exsit in the existing system microcontroller, and then to suggest the improvements to the existing system’s design and make application of improved control system of simulate locomotive. It will then provide the laboratory with a new learning prototype and also can provide favorable conditions for the future research. The specific research work are as follows:Design and applcation of the hardware system:for the found problems of the exsiting control system of simulate locomotive, we redesign the hardware circuit below is Included.1 Select STM32F103RB as the system microcontroller2 Design Power Battery circuit, and make application of recharge, battery protection, boost and power conversion of lithium-ion battery’s3 Download the circuit from which the program can be downloaded and then achieve the conversion of level signal4 Design wireless communication module--- NRF24L01 and build a bridge of the wireless communication between simulate locomotives and PC;5 Design the drive module of locomotive, and achieve the locomotive’s movement by the power of small power module---CR7010B t6 Design RF card reader module to make realization of reading IC card and complete the commissioning of each module.Design and Applcation of the software system:Based on the hardware circuit and According to the system’s requirements, the software design is completed including 1:Design the motor’s control module and realive controling simulate locomotive’s speed by controling PWM output.2 by the means of operation on Rf card read/write module, realize the positioning of the simulate locomotive3 Configure the wireless communication module to realize the communication between the simulate between locomotive and upper computer and then complete the commissioning of each module.Test of the whole system:after testing the overall control system of simulate locomotive, we will find that, due to that the rechargeable battery replaces for lithium polymer battery, the locomotive’s overall weight drops greatly. While the battery’life is not shortened. In addition, low power motor driver can drive the locomotive to work in good condition. The stability of the communication improves greatly than before. Commucation delcay decreases and the loss rate of communication data drops. All of these meet the demand of anticipated design.