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Singular perturbation model-based method for cooperatively controlling shape and thickness of hot rolled sheet

A singular perturbation and cooperative control technology, applied in the direction of adaptive control, general control system, control/adjustment system, etc., can solve the problem of low precision of plate thickness control, achieve strong real-time performance, small steady-state error, and fast response fast effect

Inactive Publication Date: 2019-02-19
AUTOMATION RES & DESIGN INST OF METALLURGICAL IND
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for collaborative control of hot-rolled sheet shape and thickness based on a singular perturbation model, so as to solve the problem of low precision control of hot-rolled sheet shape and thickness at home and abroad
Greatly improve the shape and thickness control accuracy of hot continuous rolling thin plate

Method used

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  • Singular perturbation model-based method for cooperatively controlling shape and thickness of hot rolled sheet
  • Singular perturbation model-based method for cooperatively controlling shape and thickness of hot rolled sheet
  • Singular perturbation model-based method for cooperatively controlling shape and thickness of hot rolled sheet

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Embodiment Construction

[0039] The specific implementation process of the present invention for the coordinated control of the shape and thickness of the hot-rolled thin plate is as follows:

[0040] Step 1: Discrete singular perturbation modeling and shape and thickness collaborative controller design for the hot-rolled sheet rolling process

[0041] The four-roll bending hot rolling mill is selected as the controlled object, and the discrete singular perturbation model is established as in formula (1), and the control law (3) is designed, and the controller gain is obtained through theorem 1. The parameters of the controlled system are shown in Table 1.

[0042] Table 1 Parameter list of the controlled system

[0043]

[0044] Let the initial value x(0)=[0.2 0.01 01×8]T, ε=0.1, carry out the simulation, the response curve of the closed-loop system is as follows figure 1 and 2 and control input responses such as image 3 .Simulation results show that the control method can achieve cooperative...

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Abstract

The invention provides a singular perturbation model-based method for cooperatively controlling the shape and the thickness of a hot rolled sheet, and belongs to the technical field of strip rolling control. The singular perturbation model-based method combines singular perturbation technique and rolling control theory, designs a static output feedback controller, gives a gain solution theorem ofa controller, and the effectiveness of the method is verified through simulation. The singular perturbation model-based method has the advantages of low steady-state error and high real-time performance, and can realize cooperative control of shape and thickness, thereby greatly improving the precision of the shape and thickness control of hot rolled sheets.

Description

technical field [0001] The invention belongs to the field of metallurgical engineering automation and intelligence, in particular to a method for collaborative control of hot-rolled sheet shape and thickness based on a singular perturbation model. It is especially suitable for the high-precision control of the shape and thickness of the thin plate in the process of hot rolling or cold rolling. Background technique [0002] Compared with medium and heavy plates, it is very difficult to control the shape and thickness of hot continuous rolled thin plates, and the difficulty increases with the increase of plate width and the decrease of thickness. At present, the shape and thickness control of hot-rolled thin plates at home and abroad generally adopt independent controller design and coupling compensation methods, and the actual production site mainly adopts models and control algorithms imported from abroad. According to the survey, it is found that the current domestic hot-r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 陈金香
Owner AUTOMATION RES & DESIGN INST OF METALLURGICAL IND
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