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Closed-loop control method of cold-rolled sheet shape based on lag compensation

A closed-loop control and lag compensation technology, applied in the field of metallurgical rolling, can solve the problems of low execution efficiency, cumbersome calculation process, difficult real-time performance, etc., and achieve the effect of low calculation complexity, simple system structure, stability and fast response

Inactive Publication Date: 2016-06-29
YANSHAN UNIV
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Problems solved by technology

In the study of lag compensation control of the cold-rolled strip shape control process, many scholars have proposed many novel control strategies based on artificial intelligence methods, but most of these new adaptive and intelligent control algorithms have complex structures and cumbersome calculation processes. As a result, its execution efficiency is not high, and it is difficult to apply it to engineering practice that requires high real-time performance

Method used

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  • Closed-loop control method of cold-rolled sheet shape based on lag compensation
  • Closed-loop control method of cold-rolled sheet shape based on lag compensation
  • Closed-loop control method of cold-rolled sheet shape based on lag compensation

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Embodiment 1

[0036] This embodiment discloses the processing process of a flat shape closed-loop control method based on hysteresis compensation for the last stand of a 1450mm five-stand continuous 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.

[0037] Table 1 Main parameters of rolling process

[0038]

[0039]

[0040] Such as Figure 5 As shown, the concrete steps of the control method of the present invention are as follows:

[0041] Step 1, formulate the structure of the plate shape closed-loop control system based on the multivariable optimization model; the plate shape closed-loop control system includes four control loops, each control loop corresponds to a control process of a plate shape adjustment mechanism, and is controlled by the corresponding...

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Abstract

The invention discloses a closed-loop control method of cold-rolled sheet shape based on lag compensation. The closed-loop control method comprises the specific steps of manufacturing a structure of a sheet shape closed-loop control system based on a multivariate optimization model; designing the multivariate optimization model of the sheet shape closed-loop control system; manufacturing PID control models of all sheet shape regulating mechanisms; manufacturing PID+Smith predictor control models of all the sheet shape regulating mechanisms; determining process models of control circuits of all the sheet shape regulating mechanisms, and setting corresponding PID parameters; and establishing control modes of the sheet shape closed-loop control system. The closed-loop control method has the advantages that the influence of measurement lag to the stability of the sheet shape closed-loop control system during sheet shape control process can be removed through switching the sheet shape closed-loop control modes according to the rolling speed change, the structure is simple, the calculation efficiency is high, the control real time performance is relatively high, the stability of the sheet shape closed-loop control system is not influenced by measurement lag, and relatively high homeostatic control accuracy is achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgical rolling, in particular to a lag compensation-based closed-loop control method for cold-rolled strip shape. Background technique [0002] At present, in the rolling process, many control objects have serious lag time. This pure hysteresis is often caused by the transfer process of materials or energy, or by the objective arrangement of the measuring sensors. In flatness control, because there is a certain distance between the flatness meter and the roll gap of the rolling mill, the flatness measurement signal fed back by the flatness meter is not the actual shape of the strip in the current roll gap, but lags behind for a certain time , so shape control is also a typical hysteresis control process. On the one hand, due to the influence of measurement lag, the adjusted variable cannot trigger the control signal in time, and the effect of the control signal can only be reflected in the adjust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/46
CPCB21B37/46B21B2275/04
Inventor 王鹏飞彭艳刘宏民王东城白振华刘丰
Owner YANSHAN UNIV
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