The Research And Realization Of Close-loop Observation And Control Systems Which Is In Air Conditioning Of The Train

With the air conditioning of the railway passenger car universal application, the repair work of the air conditioning unit in the passenger car has already received increasing attentions. To ensure the repairing quality, the railway department has put forward a series of requests and pointed that the air-condition unit must undertake performance experiments, when the vehicles are under overhaul. The study and design of the measurement and control system of the air conditioning unit are provided in this paper. It is a special device, which is used to carry out performance experiments and serve the unit air-conditions of the passenger car.Air conditioning units are widely used in the railway passenger car in China. Based on the design gist, such as the method of unit air-condition experimentation in railway trains(TB/T2423—93), and other correlative standards, the structure design, hardware design of computer testing system and software exploitation of the measurement and control system are given in this paper. Firstly, the models controlled by computers are studied in detail, and the traditional computer-controlled methods that are compared with the new process control system are analyzed. Then, the principle of fuzzy control system and the general design method of the fuzzy controller are studied. Finally, the model of the measurement and control system and some other parts are designed. Secondly, starting in the general design model of measuring and controlling system, this paper has put forward the collectivity design of the computer measuring system of the test-bed and done something to strengthen the anti-jamming ability of the system. Thirdly, this paper has used Visual Basic 6.0 and C++ program language to exploit the software .Parallel work methods are used in this paper. The status of regulation and data collection, display and output can be carried out paralleled, which increase the level of automation test and save the human labor. The labor intensities are reduced and labor productivities are increased labor productivity by the parallel work methods.