Design And Research On The Braking Control Unit Of Inter-city High Speed Rail Brake Test System

Transportation is an activity of realizing the variation of people and things spaceposition, and it is closely linked with people’s production and life. Since the birth ofrailway, it has become the main power in the transportation because of its big trafficvolume, fast speed, safety, and convenience etc. With the development of economy,the requirements for railway is higher and higher, especially with the quickening ofthe process of informatization, the requirements of all walks of life for the speedincrease year by year,and give birth to the generation of high speed railway.High speed railway development is due to the improvement of the performance ofthe brake control system; No efficient, safe, fast brake system, high-speed rail isimpossible develops. Therefore, the development of new and good performance of thetrain brake control system is the key of current development of high-speed railwaytransportation.Braking control system is the core of the train brake system parts. Only bettercontrol to achieve better braking, therefore, this paper combining with the practicegives the research and design for the brake control unit of braking control system. Thecurrent braking control unit is more controlled by computer, to realize the brakecontrol accuracy, stability and safety, therefore, this paper chooses the LPC1768industrial control microprocessor as the braking control unit of the main control chip,to realize the system design.Braking control unit design includes the hardware and software design. Thehardware design includes the CPU module, DA/AD conversion module, switchinput/output module, PWM wave output module, display module, and communicationmodule design. The software design includes the algorithm of software design, mastercontrol program design, and communication program design, etc. Braking control unitcontrol algorithm is adaptive fuzzy PI control algorithm.The paper detailed analyzes the theory of design the brake control unit firstly,and on this basis, designs the hardware and software of brake control unit, and finallydoes the experiments on the modules of the brake control unit. The experimentalresults show that the braking control unit design gave in this paper accords with thedesign requirements, and can satisfy the performance requirements of the brake control test system.