Optimization method of non-square plate shape control system
A technology of strip shape control and optimization method, which is applied in the field of metallurgical rolling, can solve the problems of not considering the roll shifting control strategy of the intermediate roll, low service life, roll wear, etc., and achieve the effect of practical method, stable operation and increased service life
Active Publication Date: 2021-06-04
YANSHAN UNIV
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However, these studies are limited to the square control problem. Up to now, there is no related literature on the non-square control problem, that is, the number of adjustment means and plate shape components is not equal; at the same time, these studies are limited to The decoupling of the system does not consider the control strategy of the intermediate roll shifting, and in the actual rolling process, the greater the online shifting of the intermediate rolls, the more frequent the use, the more serious the wear of the rolls, and the lower the service life
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[0061] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.
[0062] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.
[0063] figure 1 The optimization method of the non-square control system of the present invention is shown, the method includes the following steps:
[0064] S1. Formulate the decoupling strategy for the non-square plate control system: use the plate shape control deformati...
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The invention provides an optimization method of a non-square plate shape control system. The optimization method comprises the following steps: calculating an influence matrix of the control system, solving an open-loop transfer function of the system, calculating a non-square relative gain matrix, analyzing the coupling degree of each control loop and formulating a decoupling strategy of the non-square plate shape control system by utilizing a plate shape control deformation mechanism model; controlling the selected non-square control loop by applying a generalized inverse decoupling theory, and decomposing and eliminating an unstable pole of a decoupling controller; formulating an intermediate roll shifting influence coefficient variable model; and designing an intermediate roll shifting control strategy of generalized inverse-diagonal matrix decoupling through polynomial fitting, and calculating the minimum adjustment quantity of intermediate roll shifting. According to the method, the dynamic characteristics of the system are improved, the system adjusting time is shortened, the use frequency and the adjusting amount of shifting of the middle roller are reduced, and the method is simple, practical and effective.
Description
technical field [0001] The invention belongs to the technical field of metallurgical rolling, and in particular relates to a decoupling method for a non-square control system and a decoupling method for intermediate roll shifting and an optimization method for a control strategy. Background technique [0002] Flatness control is an important key technology in cold-rolled strip production, and how to establish a practical flatness control strategy and model has always been a major scientific and technological problem. Shape is an important quality index of cold-rolled strip, and poor shape will have an important impact on subsequent processes. At present, a large number of cold-rolled strips are rolled by six-high rolling mills. There are five types of on-line adjustment methods for plate shape, including roll tilting, symmetrical bending of work rolls, asymmetrical bending of working rolls, bending of intermediate symmetrical rolls, and symmetrical roll shifting of intermedi...
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Login to View More IPC IPC(8): B21B37/28G06F17/16
CPCB21B37/28B21B2263/02G06F17/16
Inventor 刘宏民宋明明高心成徐扬欢汪永梅王东城
Owner YANSHAN UNIV