| In this paper, by analysing function and demand of the metro bogie test system, four parts of the system are designed and researched which includes establishing measure channels for every parameters, designing PLC control system, implementing digital PID control arithmetic for analogue quantity load and real-time monitor -control program. Firstly, based on the system demand, the sensors are chosen and the weight transducer circuit is designed, the indeterminacy of all acquisition channels is evaluated. The program controller and industrial computer are used as the core of the system to design load and location of metro bogie. The switch of computer and operating panel is solved to locate metro bogie respectively.The model of the metro bogie loading control is analysed and the system transfer function is acquired. Based on digital PID control arithmetic, Matlab is applied to simulate the arithmetic and the result of simulation indicates the arithmetic is feasible. The real-time monitor and control software is developed by configuration software Kingview 6.02, and good interactive interface is provided to avoid the heavy manual work. |