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A Synergistic Consistent Fault-Tolerant Control Method Based on Virtual Master Shaft

A virtual total axle, fault-tolerant control technology, applied in the direction of motor control, multiple motor speed regulation, control system, etc. The effect of fault tolerance control

Active Publication Date: 2022-01-14
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Today, with the increase of train speed, the operation of high-speed trains is subject to the adhesion between wheel and rail, and the adhesion between wheel and rail is a complex process with great uncertainty. The adhesion characteristics between the wheels and rails show strong nonlinear and fast time-varying characteristics, and the available adhesion at the same place will change significantly. When a wheel set of the train slips or idling fails, the wheel will lose the adhesion. At the same time, continuous idling or slipping will cause wheel and rail abrasions. On the one hand, the traction power of the train will be lost, and on the other hand, the service life of the wheel and rail will be shortened.

Method used

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  • A Synergistic Consistent Fault-Tolerant Control Method Based on Virtual Master Shaft
  • A Synergistic Consistent Fault-Tolerant Control Method Based on Virtual Master Shaft
  • A Synergistic Consistent Fault-Tolerant Control Method Based on Virtual Master Shaft

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Embodiment Construction

[0023] The present invention will be further described below in combination with specific embodiments.

[0024] According to the existing research "Consensus-based total-amount cooperative tracking control for multi-motor locomotive traction system", the multi-motor mathematical model is specifically:

[0025]

[0026] In the formula, R j , L j Represent the resistance and inductance of the armature circuit, i j is the motor current, ω j is the output angular velocity of the jth motor gearbox, u j is the voltage at the input port of the armature circuit, k ej is the back electromotive force constant, k tj is the transmission ratio of the gearbox. J 0j and J 1j are the moments of inertia of the motor and the gearbox respectively, b 0j and b 1j are the viscous friction coefficients of the motor and the gearbox, k mj is the motor torque constant, Τ Lj is the load torque, Τ ej output torque for the motor.

[0027] Since the multi-motor system is smooth and differe...

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Abstract

The present invention proposes a multi-motor total-coordinated fault-tolerant control method based on a virtual main shaft. By using the feedback characteristics of the virtual main shaft control strategy, once a wheel set of a high-speed train slips or idling fails, in order to prevent the failure from continuing to occur, Using the feedback adjustment characteristics of the virtual main shaft to reduce the total traction torque, the multi-motor system will also keep dynamic tracking of this torque change to maintain the same total traction power of the system, and restore the total torque after the sticking fault returns to normal Normal, when the system recovers and maintains a steady state, it also ensures the consistency of the total traction power.

Description

technical field [0001] The present invention relates to the technical field of train control, and more specifically, relates to a method for synergistic and consistent fault-tolerant control of multiple motors based on a virtual master shaft. Background technique [0002] Today, with the increase of train speed, the operation of high-speed trains is subject to the adhesion between wheel and rail, and the adhesion between wheel and rail is a complex process with great uncertainty. The adhesion characteristics between the wheels and rails show strong nonlinear and fast time-varying characteristics, and the available adhesion at the same place will change significantly. When a wheel set of the train slips or idling fails, the wheel will lose the adhesion. At the same time, continuous idling or skidding will cause the wheel rails to be scratched. On the one hand, the traction power of the train will be lost, and on the other hand, the service life of the wheel rails will be shor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P5/46H02P29/028
CPCH02P5/46H02P29/028
Inventor 何静谌雪媛张昌凡杨步充刘建华赵凯辉余昊宇刘志天
Owner HUNAN UNIV OF TECH