Online recursive parameter estimation-based roll eccentricity compensation equipment

Abstract

The invention discloses online recursive parameter estimation-based roll eccentricity compensation equipment, which comprises a sampling device (18) used for sampling and calculating a roll eccentricity signal in an eccentricity test, a conversion device (19) for performing discrete fast Fourier transform off line, a device for sampling on line and calculating the roll eccentricity signal in the rolling process, a device for realizing online recursive parameter estimation, and a roll gap compensation device, which are connected in turn through electric signals. The common detection equipment on a rolling mill is only used, the special detection equipment is not needed, the rotating angle of a support roll is not needed to be accurately acquired, the influence of roll eccentricity on the thickness accuracy of rolled metal can be effectively compensated and the thickness control accuracy is improved.

Description

technical field [0001] The invention relates to roll eccentricity compensation equipment based on online recursive parameter estimation. Background technique [0002] Due to the irregular shape of the roll and the roll bearing, the rotation axis and the geometric axis of the roll do not exactly coincide, which is called roll eccentricity. These irregular shapes may occur in the manufacture, grinding, assembly, wear, thermal expansion, etc. of the roll. In the process, since the roll diameter of the backup roll is much larger than that of the work roll and the intermediate roll, the eccentricity of the roll is mainly caused by the non-circle of the backup roll itself and the out-of-axis of the roll diameter and other rolls. [0003] In the production of strip steel, the eccentricity of the roll will cause the automatic thickness control system of the rolling mill to adjust in the opposite direction, causing periodic fluctuations in the rolled thickness of the strip steel, whi...

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Problems solved by technology

[0009] For this reason, the applicant used fast discrete Fourier transform to analyze the sampled eccentric signal off-line in the early stage, but it was only used to determine the form of the main component of the eccentric signal of the rolling mill, not to determine the parameters of the main component in the eccentric signal

Moreover, the fast Fourier transform is performed offline on the industrial computer, and there is no real-time requirement for the calculation time

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