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Second-flow based self-adaptive method for controlling thickness of plate of single-stand reversing rolling mill

A self-adaptive control and second flow technology, applied in rolling mill control devices, metal rolling, metal rolling, etc., can solve the problems of high-frequency fluctuations in finished products, failure to reflect the thickness of the entrance and exit, and compensation for roll eccentricity, so as to improve accuracy, Improve the effect of thickness control and improve the accuracy of feedforward control

Inactive Publication Date: 2014-09-10
中冶赛迪电气技术有限公司
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Problems solved by technology

[0004] The advantage of this method is: rapid response to steady-state errors; the disadvantage is that the proportional integral control gain needs to be adjusted, and it does not reflect the compensation for the entrance thickness and roll eccentricity, resulting in the finished product being susceptible to damage when a single second flow control is used. Some effects of high-frequency fluctuations in materials

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  • Second-flow based self-adaptive method for controlling thickness of plate of single-stand reversing rolling mill
  • Second-flow based self-adaptive method for controlling thickness of plate of single-stand reversing rolling mill
  • Second-flow based self-adaptive method for controlling thickness of plate of single-stand reversing rolling mill

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[0017] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

[0018] The hydraulic pressure-roll gap servo system of the present invention is adjusted so that when the roll gap change step value of 20 microns is given near the minimum working pressure of the system, the rise time is τ 1 Second.

[0019] In this paper, for a certain variable B, the expression in the k-th period is B(k), the expression in the k-1 period is B(k-1), and the expression in the k+1 period is B(k+1) . If the variable B is constant, it is directly represented by B in the k period.

[0020] Further, the method specifically includes the following steps, in the kth execution cycle of the program written according to the method:

[0021] 1. The actual pla...

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Abstract

The invention discloses a second-flow based self-adaptive method for controlling the thickness of the plate of a single-stand reversing rolling mill, comprising the following steps: measuring the thickness of an inlet of a workpiece to be rolled to obtain the thickness of an inlet strip steel of the roller gap, measuring the speed of the inlet strip steel and the speed of an outlet strip steel of the workpiece to be rolled, calculating to obtain an estimated value of the thickness of the strip steel, carrying out feedback control by adopting the traditional second-flow control method, identifying parameters at the same time to obtain the estimated value hat(c)1 of the parameter cp / cm, the estimated value hat(c)2 of the eccentricity coefficient vector c2 which corresponds to each roller and the estimated value hat(c)3 of the steady-state setting error a, and calculating according to formulas after the parameter identification is stable to obtain an actual roller gap setting value. The thickness of the strip steel is calculated on the basis of the second flow, the dependence on an outlet thickness tester is avoided, the process parameters are estimated by adopting the online identification method, the process parameters and the eccentricity signal are estimated simultaneously, and the feedforward control precision, the parameter estimation precision and the thickness control effect are improved.

Description

technical field [0001] The invention relates to an automatic plate thickness control method for a single stand rolling mill for response control of workpiece plate thickness. Background technique [0002] Such as figure 1 with figure 2 As shown, the figure shows the conventional method of control used in a conventional hydrodynamically loaded rolling mill. The working process of the single-stand reversible rolling mill is as follows: the workpiece to be rolled passes through the uncoiler 1, and after passing through the guide roll 2, it is rolled between the upper work roll 6 and the lower work roll 7, and the rolled workpiece passes through the guide roll 11 , is wound by the coiler 12. [0003] The second flow control principle is as follows: the actual plate thickness obtained by the rolling mill entrance thickness gauge 3 is passed through the delay module 13 to obtain the entrance thickness value at the rolling moment. According to the principle of constant flow pe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/16
Inventor 刘斌于目奎沈加强
Owner 中冶赛迪电气技术有限公司
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