The Research On The Control Scheme Of The Sliding Plug Door Control System Of Rail Vehicle

As an important equipment and access channel for rail vehicles,the stable and reliable operation of the sliding plug door is closely related to the passengers'safety and property.Although in the practice the door bears the characteristics of higher efficiency and reliability,there are problems with its operation.Further study of the door control system of the motor operation control is useful for improving reli'ability and security.Firstly,through analyzing the structure and main functions of the control system of the sliding plug door,the permanent magnet synchronous motor is selected as the driving motor of the control system.The mathematical models of PMSM in three coordinate systems(three-phase stationary coordinate system,two-phase stationary coordinate system and two-phase rotating coordinate system)are analyzed.Secondly,the PMSM speed servo system and the position servo system are respectively built in the MATLAB simulation platform.The PI controller is used for the simulation research.The vector control technology id=0 is adopted to study the speed,three-phase stator current and electromagnetic torque simulation waveforms of the PMSM starting with load,sudden loading and unloading.The paper studies simulation waveforms of rotational speed response and position tracking response in forward position servo control system.Thirdly,the PMSM control system is simulated based on the approach law sliding mode controller.With the combination of general design steps of the sliding mode controller and the reaching law,speed and position controller are designed.The sliding-mode controller with exponential approach law is applied to both the speed loop and position loop.An exponential approach law sliding mode controller is adopted to speed loop and position loop.A research that centers on rotation rate,three-phase simulation waveform of stator current and electromagnetic torque is performed in the following cases:PMSM switching on load,with a sudden load and unload during operation.Then a comparative study is carried out between the former and the simulation waveform of speed response and position tracking response in forward position servo control system with PI controller.Finally,the anti-extrusion function of the door is briefly analyzed,and the door experiment is carried out on the sliding plug door.