Research On Control Technology Of100%Low Floor Vechicle Traction And Steering

100%Low Floor Vehicle (100%LFV) has become more and more popular in the field of Urban Railway Transportation because of its advantages of humane, environmental matching, construction period and cost, noise, etc. We must use independent wheelsets because of the hight requirement of100%LFV, so the guidance control becomes the key technology to achieve100%LFV. Taking the100%LFV for the object, this paper is committed to solve the guidance problem from the electric traction.Firstly, the thesis analyzes the force of the conventional rigid wheelsets and independent wheelsets, combined with the motion equations of wheelsets, researches why the independent wheelsets can’t steering. Combining the conventional rigid wheelsets and independent wheelsets, the active steering based on torque has been researched, the simulation model of which is created based on the AC induction motor in the Simulink environment of MATLAB, then the traction performance and the guiding response of the control system are discussed and the results show the correctness of the control system. Corresponding the active steering based on torque, the active steering based on velocity is researched and a simulation model is created. The simulation results show that the active steering based on velocity is superior to the active steering based on torque.Secondly, for the particularity of the traction and guidance control system of100%LFV, the control system based on indirect field-oriented control (IFOC) theory with field weakening and online adaptive observer of the rotor time constant are studied. The field weakening controller and rotor time constant observer are designed. Then the full model of the traction and guidance control system are established, the simulation results verifies the accuracy and reliability of the algorithm.Finally, the conventional car and100%LFV models are set up in the dynamics software SIMPACK. The self-steering ability of the conventional rigid wheelsets and independent wheelsets are verified through the simulation. In combination with the active steering based on velocity and100%LFV model to establish the co-simulation control system, which achieves100%LFV’s traction and steering features respectively and shows the practicability of the control system.