Urban rail train adhesion control method and system based on frame control mode

Abstract

The invention discloses an urban rail train adhesion control method and system based on a frame control mode. The method comprises the steps:establishing a biaxial dynamic model of an urban rail trainunder the frame control mode and a load model under parallel operation of traction motors; judging the moving shaft which is easier to idle in the two moving shafts of the model according to the train operation condition, and taking the rotor angular speed of the moving shaft as a reference rotor angular speed; performing optimization control on the driver-controlled traction torque according tothe running rail surface state of the train to obtain a torque set value required by traction motor control and obtain an excitation given value required by traction motor control; carrying out vectorcontrol and pulse width modulation according to the reference rotor angular speed to acquire the torque given value and the excitation given value, driving pulses needed by traction converter control, and controlling the two traction motors of the model. According to the invention, the adhesion condition between wheel tracks and the dynamic characteristics of a vehicle body can be truly simulatedto verify the correctness of a traction control strategy.

Description

technical field [0001] The invention belongs to the technical field of urban rail train traction control, and in particular relates to an urban rail train adhesion control method and system based on rack control mode. Background technique [0002] Since the beginning of the 21st century, with the rapid development of my country's modernization and social economy, the population of modern cities has increased significantly and the area has continued to expand. The problem of urban traffic congestion has become increasingly prominent. Traffic accidents, noise and air pollution have affected people's work and life. Urban rail transit has shown a positive role in optimizing urban spatial structure, alleviating urban traffic congestion, and protecting the environment. It has increasingly become an important strategic measure for China to take the road of new urbanization. With the acceleration of China's urbanization process, the demand for urban transportation has increased shar...

AI Technical Summary

Problems solved by technology

Ideally, the load distribution of the two traction motors is the same, and the power of each motor should be the same. However, in actual engineering applications, the power deviation of parallel motors often occurs. It will also inevitably cause the load imbalance of the two traction motors

Usually, during the traction process, the adhesion torque of the traction motor torque wheel set on the large wheel diameter wheel set is relatively large, so idling is very easy to occur

During the braking process, the adhesion torque of the traction motor torque wheel pair on the small wheel diameter wheel pair is relatively large, so it is easy to slip, which will not only increase the wear of the wheel rail, but also affect the comfort of passengers

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