Research On Lagrange Dual Speed Optimization Based On Train Dynamics Model

As China further accelerates the pace of modernization construction, the transportationbrings pollution and energy consumption. Especially in the energy consumption, which hasbecome a key factor of restricting the development of national economy. Therefore, how toreduce the energy consumption in the process of the train operation is a great significance inresearch.For those reasons, the thesis lucubrates the running train dynamics characteristics. Thenit establishes the train dynamics model, combing with the Lagrange dual optimization methodand optimizing the key parameters of the model, achieve the purpose of energy saving.The thesis mainly includes the following aspects. Firstly, based on the train tractioncalculation theory and the whole train model, make full use of multibody system dynamics tohave depth analyse the train when it be affected by the traction, running resistance, brakingforce and so on. After that, considering the characteristics of various stress and impact on thetrain operation speed as well as energy consumption, find out the relationship between variousforces in the course of train operation and the influence for train speed that the force have,from the perspective of integrated and real-time, construct that train dynamics model indifferent lines and catch sight of coordination of the model between the lines.Then, for dynamic characteristics of the running train, it demands considering theinteraction between the train and the track from the view of system engineering, thereuponthen construction of railway vehicle dynamics model. So it is important to analyse the causesof train lines, suspension system and other external factors in the train operation process,discovery main reason and constraint that influence the speed and energy consumption of thetrain in the process of operation, according to the actual situation of train operation propose anoptimized scheme of train dynamics model.Next, lead the Lagrange dual optimization method into the dynamics optimization modelof the train, the final output is train speed and train operation sequence that the train runningin different lines. Using Lagrange dual optimization method to optimize the train operationprocess, to propose the dynamic control equations of multibody system that based on traindynamics model, the dynamics of multibody systems model is a group of differentialalgebraic hybrid mathematical equations, the train dynamics model that optimized byLagrange dual optimization technique can achieve good energy-saving effect.In the end of the thesis uses MATLAB make modular programming for train optimizedhandling dynamics model. In the thesis, combine the dynamics model with Lagrange dualoptimization method, based on the energy consumption in the course of train operation, makeoptimization simulation contrast among punctuality, amenity and security when the train running. The results show that the proposed method in the thesis can provide a more effectiveenergy conservation for the train operation.