The Inplement Of Speed Control Function In Ato System By Using Semi-Physical Simulation Method

Automatic train Operation (ATO) is one of the most important sub-system in the modern urban rail transit train control system.With the increase of the complexity of ATO system, the adaptability and the accuracy of the control algorithm are also increased. As shown in previous studies, the conventional control algorithm for ATO system is developed by the off-line simulation based on MATLAB/Simulink methods. However, such pure software methods exhibit some drawbacks.for example, it cannot build the connection between the control algorithm and the real train device, and it is inconvenient to change the algorithm parameters flexibly.Therefore,the pure software methods will wast time and resource seriously, and not helpful to the actual development of ATO.The semi-Physical simulation system can be connected to the real train through physical interface, and can realize data interaction in real-time. In addition, we can observe the simulation results more intuitively and change the control parameters more repidly by monitoring the interface. This semi-Physical simulation system provides a good platform for the research and development of ATO system.Based on the previous studies on the speed control in ATO system, a novel semi-Physical real-time system is designed and realized.According to the actual track/brake system and the speed control by ATO, we design the controlled object model.Firstly, the simulation system in pure software is the parameters for the control algorithm are set up by adopting classical PID and adaptive fuzzy PID control algorithm. Then, the semi-Physical ATO simulation system is implemented, which is the main contribution in this paper. In semi-Physical system, the diving program and the controlled algorithm are developed. Finally, both the pure software simulation and semi-Physical simulation are performed into the ATO model. The results show that, the semi-Physical simulation has some predominant advantages compared with the pure software simulation method, which include:remving the limitation in the pure software simulation, and providing more true and comprehensive method for inspection of control algorithm. Therefore, our studies verify that the semi-Physical system is more helpful for the development of controller in ATO system.