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A multi-motor total amount collaborative consistency fault-tolerant control method based on a virtual total axis

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

Active Publication Date: 2019-03-22
HUNAN UNIV OF TECH
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  • 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 multi-motor total amount collaborative consistency fault-tolerant control method based on a virtual total axis
  • A multi-motor total amount collaborative consistency fault-tolerant control method based on a virtual total axis
  • A multi-motor total amount collaborative consistency fault-tolerant control method based on a virtual total axis

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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 invention provides a multi-motor total amount collaborative consistency fault-tolerant control method based on a virtual total axis. Based on the feedback characteristic of a virtual main axis control strategy, once a certain wheel set of a high-speed train has a slip or idling fault, to prevent the fault from continuously happening, the traction total torque is reduced by using the feedback regulation characteristic of the virtual total axis; a multi-motor system can also keep dynamically tracking the moment change so as to keep the total amount of traction power of the system consistent;the total moment is restored to be normal after the adhesion fault condition is restored to be normal, and the total amount consistency of the traction power is guaranteed while the system recovers and maintains the steady state.

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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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
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