Fault diagnosis and feedback system according to third octave flutter of high-speed cold rolling mill

Abstract

The invention discloses a fault diagnosis and feedback system according to third octave flutter of a high-speed cold rolling mill, and relates to the field of sensing signals of the rolling mill and computer automatic control engineering. The fault diagnosis and feedback system is mainly composed of a rolling mill signal acquisition unit, a computer diagnosis control unit, a rolling mill vibration abatement execution unit and an off-line model adjustment unit. The fault diagnosis and feedback system is mainly characterized in that according to the principles and characteristics of the third octave flutter of the rolling mill, acquired signals are guided into the computer diagnosis control unit, sorted and analyzed, then, a vibration control module generates vibration abatement signals, the vibration abatement signals are output to the vibration abatement execution unit so that the rolling mill can be adjusted in terms of a plate tension relaxation device and a main transmission speed and the vibrating energy of the rolling mill is lowered, and then self-excited vibration of the rolling mill is eliminated; meanwhile, acquired control data streams are transmitted to a computer of the off-line model adjustment unit, and an expert system is used for off-line fault diagnosis and analysis to improve fault diagnosis and a control algorithm.

Description

technical field [0001] The invention relates to the fields of sensing signals of rolling mills and computer automatic control engineering, and mainly relates to a fault diagnosis and feedback system for third-octave flutter of high-speed cold rolling mills. Background technique [0002] Steel plays an important role in the development of the national economy. Steel is widely used in industrial production, transportation, national defense, aerospace and other major fields. With the development of modern industry, the demand for steel products, especially cold (hot) rolled thin strip steel, in all walks of life is increasing, and the quality requirements are getting higher and higher. With the booming of other industries, this requirement will be significantly more urgent. Therefore, improving rolling speed and product quality is considered to be one of the important directions for the future development of the steel industry. It is of great significance to improve the pro...

AI Technical Summary

Problems solved by technology

[0003]The frequency range of the vertical vibration of the first type of rolling mill is 150~350Hz, also known as the third octave flutter, and the main vibration type is the reverse movement of the two work rolls , it will cause obvious defects such as difference in strip thickness, and even cause accidents such as broken strips in severe cases. At this time, the speed reduction can quickly suppress the vibration, resulting in obvious strip thickness fluctuations, which can reach 30% to 50% of the target thickness in severe cases, resulting in waste products, broken strips and endangering equipment safety.

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