Vibration suppression method for steel rail welding head straightness detection system

A detection system and flatness technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as non-compliance with high-speed control systems, increase mechanical structure rigidity, and increase system inertia, and achieve the scope of application Wide, improve accuracy, reduce the effect of noise signal

Inactive Publication Date: 2017-04-26
SHANGHAI UNIV OF ENG SCI
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Problems solved by technology

[0005] The traditional vibration suppression methods mainly include: increasing the stiffness of the mechanical structure or reducing the speed, and the former will increase the cost and the system inertia will become larger; the latter will reduce the detection efficiency and do not meet the needs of high-speed control systems

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  • Vibration suppression method for steel rail welding head straightness detection system
  • Vibration suppression method for steel rail welding head straightness detection system
  • Vibration suppression method for steel rail welding head straightness detection system

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Embodiment Construction

[0026] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] like figure 2 As shown, on the basis of the existing rail welding head flatness detection system, the present invention adds an input shaper. The input shaper is established based on the finite time Laplace after analyzing the mathematical model of the servo control system and the transmission system. The input shaping algorithm for the transform. The input command controls the movement of the transmission system after input shaping and PID adjustment of the servo control link.

[0028] 1.1. Establish the mathematical model of the servo motor

[0029] The state equation of the servo motor on the d and q axes can be expressed as:

[0030]

[0031] Among them: R is the equivalent resistance of the winding; L is d, the equivalent inductance of the q-axis; p is the magnetic logarithm; ω m is the angular velocity of the ro...

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Abstract

The invention discloses a vibration suppression method for a steel rail welding head straightness detection system. The vibration suppression method comprises the following steps of S1, establishing a servo motor mathematical model, performing Laplace conversion on the servo motor mathematical model, and combining with a current ring to obtain a servo motor transfer function; S2, establishing a drive system mathematical model according to a relation between working platform displacement and servo motor output displacement, and performing Laplace conversion on drive system mathematical model to obtain a transfer function of a working platform; and S3, an input instruction, after being subjected to input shaping in the steps S1 and S2, and PID regulation in a servo motor control link, controlling the drive system to move. By adoption of the vibration suppression method, noise signals in detection data and data processing difficulty can be reduced while the detection efficiency and detection result accuracy are improved; and the vibration suppression method is wide in applicable range, simple in design, and relatively high in industrial application value.

Description

technical field [0001] The invention relates to a method for suppressing vibration of a rail welding head flatness detection system, and belongs to the technical field of rail detection. Background technique [0002] In recent years, high-speed railways have developed rapidly in China. The operating mileage of high-speed railways has exceeded 19,000 kilometers, which has greatly improved the carrying capacity of China's railways and promoted the rapid development of China's economy. The long rail is welded by the 100-meter short rail. The straightness of the welding head is related to the safety and stability of the train operation. In the production and daily inspection and maintenance of the long rail, the straightness detection of the welding head of the rail is of great significance. [0003] At present, the methods of rail inspection mainly include magnetic particle inspection, eddy current inspection, infrared inspection, and machine vision inspection. Compared with o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 朱文立高飞钱园园
Owner SHANGHAI UNIV OF ENG SCI
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