Application And Implementation Of Multiple Particle Dynamics Model In Train Driving Simulation System

With the rapid development of railway enterprise in recent years, the railway mileage hasbeen increased several times, moreover, Urban rail transit which mainly consists of subwayand light rail vehicle has been developed in many large and medium-sized cities of China.This makes the demand of train driver also increase quickly. Rapid update of locomotive andmotor train unit makes training for train drivers face dire challenges, meanwhile, the lack ofaccurate dynamics model for the existing train driving simulation system, the inaccuracy ofsimulation of train speed control, the poor training effect make it is unable to achieve theanalysis of the running effect under various conditions, to provide technical support forrailway engineering consultation, engineering design and operations management personnel.Therefore we are in urgent need of a set of train driving simulation system which consist ofdriver training and scientific experiments to solve the problems of the train driver training andengineering analysis.At present, the simplified model train dynamics is mainly composed of elemental pointkinetic model and particle dynamics model. Dynamical model of elemental point is to make awhole train boil down to a rigid particle so as to analyze the stress. Its disadvantages are asfollows: the calculation function is limited; not for accurate calculation of train longitudinaldynamics especially in the change of slope and curvature point run calculation. Its advantageslie in the simple calculation; easy programming implementation. Multiple particle dynamicsmodel is to simplify the train for a particle chain length property with accurate calculation.The trains can be carried out in accordance with the actual marshalling one by one. However,the existing multiple particle dynamics model needs more calculation and is hard to program.Therefore, in this thesis, to improve the existing multiple particle dynamics modelthrough the study of elemental point and multiple particle dynamics model and combiningwith the advantages of the common. The problem of speed jump when trains pass the slopeand vurvature point through simplifying each locomotive to be particle with length attribute.Implement different locomotives and mix them into the precise calculation of the vehicles,and adopt the method of average acceleration to reduce the velocity error in calculationprocess and ensure consistency of all locomotives speed. In order to realize an autonomousdriving simulation system of train and accomplish the engineering analysis, tractioncalculation theory is introduced in this thesis based on the improved multiple particledynamics model. The discusses of the energy saving control and algorithm of hybrid controlstrategy and given, and of the two kinds of control strategies are simulated and good resultshave been achieved.On the basis of requirement analysis of system software design, in a windows environment, the use of Visual c++6.0write system program with the database using SQLServer2005. Finally, respectively in two kinds of manual driving and automatic driving modetesting system, the basic function of train driving simulation system can be achieved. And theprecise calculation of train running speed and distance can be realized and the test result isgood.