An electric traction experimental bench for urban railway vehicle is introduced.Aiming at the features of multi-parameter acquisition and real-time control

the measurement and control system based on virtual instrument is designed.An industrial computer is used as the core

LabVIEW language is used for programming

closed-loop speed control is realized on drawing motor.The road speed amount is collected

and the according vehicle speed and section are real time calculated

so that the resistance is dynamically loaded by load motor.The comparative analysis on experimental results and real vehicle test data shows that the control system make drawing motor acceleration keep 1.03 m/s2 during initial stage.In the electric braking stage

when the DC bus voltage reaches the setting threshold value 670 V

the regenerative braking switch to resistor braking in real time.The working characteristics of system keep consistent with the actual measurement datas.The system has important meaning for the research on drawing and electric braking of urban railway vehicle.