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A Multivariable Shape Control Method for Cold Rolling Mill Based on Constrained Optimization Algorithm

A technology of constrained optimization and shape control, which is applied in the field of metallurgical rolling, can solve problems such as complex modeling of the shape control system, and achieve the effects of high precision of shape control, strong system operation stability, and high calculation accuracy

Active Publication Date: 2018-01-23
启东晟涵医疗科技有限公司
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  • Application Information

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Problems solved by technology

The increase of the flatness adjustment mechanism improves the flatness adjustment ability of the rolling mill, but also makes the modeling of the flatness control system of this type of rolling mill more complicated

Method used

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  • A Multivariable Shape Control Method for Cold Rolling Mill Based on Constrained Optimization Algorithm
  • A Multivariable Shape Control Method for Cold Rolling Mill Based on Constrained Optimization Algorithm
  • A Multivariable Shape Control Method for Cold Rolling Mill Based on Constrained Optimization Algorithm

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Embodiment 1

[0037] Embodiment 1: This embodiment 1 discloses the processing process of the multi-variable flatness optimization algorithm in the last stand flatness closed-loop control system of a 1450mm five-stand tandem cold rolling mill. The plate shape adjustment mechanism includes roll tilting, positive / negative bending of work rolls, positive bending of intermediate rolls and lateral movement of intermediate rolls. The main control parameters and rolling parameters are shown in Table 1.

[0038] Table 1 Main parameters of rolling mill

[0039]

[0040]

[0041] The control method of the present invention formulates an optimization model for solving the optimal adjustment amount of each plate shape adjustment mechanism through mathematical modeling, and designs a multi-variable optimization algorithm with global convergence around the optimization model; the multi-variable The optimization algorithm transforms the multivariable plate shape optimization problem with constraints ...

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Abstract

Disclosed is a cold-rolling mill multivariate strip shape control method based on a constrained optimization algorithm. The method includes the steps that a multivariate optimization model used for solving an optimal regulating quantity of each strip shape regulating mechanism is designed; the multivariate optimization model is converted into a standard form of an optimization problem; an initial searching point for solving the multivariate optimization problem of the standard form is designed; a searching mechanism in the direction of each coordinate axis is designed; searching is performed in the direction of each coordinate axis, and a candidate value of an optimal point is calculated; a searching termination criterion is designed; and a cold-rolling mill multivariate strip shape control system model is established. By means of the cold-rolling mill multivariate strip shape control method based on the constrained optimization algorithm, the multivariate strip shape optimization model can be converted into a series of univariate optimization problems, and the method has the advantages of being high in calculation efficiency, saving the storage space of a controller and being capable of achieving concurrent computation and the like, and is quite suitable for development of a cold-rolling strip shape control system with the multiple strip shape regulating mechanisms.

Description

technical field [0001] The invention relates to the technical field of metallurgical rolling, in particular to a multivariable shape control method for a cold rolling mill based on a constrained optimization algorithm. Background technique [0002] It is known that in the production of cold-rolled strip, when the strip is stretched and deformed unevenly along the width direction, plate defects such as buckle and wave shape will occur. With the deterioration of the global environment and the increasing energy crisis, the steel used in industrial industries such as automobiles, home appliances, and packaging continues to develop in the direction of high strength and light weight, in order to achieve energy saving and emission reduction. While the demand for cold-rolled strip steel in these industries continues to increase, higher and higher requirements are placed on the shape quality of cold-rolled strip steel. From the perspective of production practice, the thinner and hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/28B21B37/30
CPCB21B37/28B21B37/30B21B2269/00
Inventor 王鹏飞彭艳刘宏民白振华王东城
Owner 启东晟涵医疗科技有限公司
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