Experimental System Design For Emu Passenger Compartment Pressure Wave Simulation

With the high development of China’s railway technology, comfort of the train compartments has attracted more and more attention. Among them, the comfort effect of pressure waves on human body has become an important issue to be faced and solved by the development of high-speed railway. At present, Abroad for the research on this problem mainly using the method that combinate the real train test and pressure cabin test. However, because of the testing environment, working condition and other factors’influence, the pressure comfort standard which set by these methods is not the same. In order to improve the EMU pressure comfort standard which suit for our country, the establishment of a pressure wave simulation system is very necessary and meaningful.According to the structural characteristics of the ventilation system of the CRH380A type EMU, a pressure wave simulation system was designed in this paper. A real EMU passenger compartment pressure wave can be simulated by controlling the interior pressure and its changing-rate accurately, which provide an effective experimental platform for the development of comfort standard.CRH380A type EMU head car was taken as the object of the research in this paper. Based on the analysis of the structure and working principle of the whole system, the passenger compartment pressure wave simulation system model was established with AMESim software, which was imported into the fuzzy control model that was already built in MATLAB/Simulink platform in the form of S function. The united simulation results show that with the effects of designed system, the interior pressure and its changing-rate can both follow the set value well, meeting the design requirements with its high-speed and high accuracy.In addition, using the existing laboratory equipments, and combining the fuzzy control algorithm, a measurement and control platform based on virtual instrument technology was also built in this paper, to actualize the real-time adjustment of the internal pressure of a closed container. By loading different input signals on the system, a series of response curves obtained. The experimental results show that the system has a good control effect, internal pressure of the container can follow the pressure instructions well. Besides, the design of the pressure wave simulation system of EMU passenger compartment was indirectly verified that has a certain rationality and feasibility.