Nonlinear speed compensation method for thickness control of irreversible aluminum cold rolling machine
A technology of speed compensation and thickness control, applied in rolling mill control devices, metal rolling, metal rolling, etc., can solve problems such as errors, and achieve the effect of improving strip thickness difference variation, improving thickness control performance, and having broad market prospects.
Inactive Publication Date: 2010-06-23
苏州有色金属研究院有限公司
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However, due to the various working conditions in the rolling process, the friction coefficient and other parameters are nonlinear changes, so the acceleration and deceleration process is a nonlinear change process. Using a simple open-loop linear proportional regulator will produce errors, and different rolling mill parameters and strip parameters will also cause a readjustment of the scaling factor
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[0027] like figure 1 As shown, the non-reversible aluminum cold rolling mill thickness control system adopts nonlinear speed compensation method, including monitoring AGC controller 1, position AGC controller 2, hydraulic cylinder 3, rolling mill body 4, position sensor 5, exit thickness gauge 6 and The nonlinear speed compensation controller 7 has two closed-loop control loops of position AGC and monitoring AGC, while the nonlinear speed compensation controller 7 constitutes an open-loop control loop, and the output of the nonlinear speed compensation controller 7 is directly superimposed on the position AGC controller set value. The thickness control system receives the speed signal and calculates the acceleration value, calculates the compensation gain according to the nonlinear speed compensation function, and introduces the rolling mill correction gain and the strip correction gain, and finally calculates the total compensation amount, which is added to the position AGC c...
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The invention provides a nonlinear speed compensation method for the thickness control of an irreversible aluminum cold rolling machine. A thickness control system receives speed signals and calculates an acceleration value, a compensation gain is calculated according to a nonlinear speed compensation function, a rolling machine revise gain and a strip revise gain are introduced, and finally the total compensation quantity is calculated and is stacked in a position AGC controller so as to finish a calculation process of once open loop nonlinear speed compensation. By using the nonlinear speed compensation function to calculate the compensation gain and adding the rolling machine revise gain and the strip revise gain, a mutual influence relationship among speed variation, thichness difference, rolling machine parameters and strip parameters is more accurately described, and the invention is suitable for various rolling machine parameters and strip alloy varieties, efficiently enhances the comprehensive finished product rate in the aluminum processing process and is worth widely popularizing and applying in the industry.
Description
technical field [0001] The invention relates to a non-linear speed compensation method for thickness control of an irreversible aluminum cold rolling mill, which is used to improve the thickness control performance of the dynamic process of the irreversible aluminum cold rolling mill, and belongs to the technical field of cold rolling mill control. Background technique [0002] In the aluminum processing industry, the irreversible aluminum cold rolling mill, as the key processing equipment, plays an important role in the entire rolling process. The automatic thickness control system of the irreversible aluminum cold rolling mill plays a vital role in ensuring the thickness performance index of the rolled product, making the thickness accuracy of the export strip within the allowable error range, and improving the overall yield. [0003] The thickness automatic control system of the irreversible aluminum cold rolling mill is generally composed of a controller, a thickness gau...
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IPC IPC(8): B21B37/16G05D5/02
Inventor 李坤杰王海霞刘文田
Owner 苏州有色金属研究院有限公司