Coiling position control method adopting main proportional control and auxiliary integral control

Abstract

The invention relates to a coiling position control method adopting main proportional control and auxiliary integral control. Control of a positioning process is divided into three stages, wherein in the first stage, when a position error is larger than a deceleration point, a drive system is controlled by an APC (automatic power control) controller to operate at the maximum speed; in the second stage, when the position error is larger than a dead zone and smaller than the deceleration point, the drive system is controlled by the APC controller to decelerate according to a square root curve; and in the third stage, when the position error is smaller than the dead zone, the drive system is controlled by the APC controller to finish a brake action, so that a controlled object stops in a positioning error allowable range, proportional-integral controllers are arranged in parallel on the APC controller and perform supplementary control in the second stage and the third stage. The coiling position control method adopting main proportional control and auxiliary integral control can increase the positioning accuracy and eliminate the control deviation.

Description

technical field [0001] The invention relates to the technical field of coiling position control in hot rolling, in particular to a coiling position control method in which proportional control is the main and integral control is supplemented. Background technique [0002] The control of the hot-rolled coiling area involves many position controls, such as the setting of the opening of the guide plate on the inlet side of the coiler, the setting of the pinch roll gap, the setting of the auxiliary roll roll gap, etc., in the hot rolling plant This type of position control is mostly controlled by an automatic position control (APC) system. These controlled devices require the APC system to be able to smoothly adjust the position of the controlled object to a predetermined target value in the shortest possible time, so that the difference between the actual position of the controlled object and the target position after the control is over can be kept at an allowable level. with...

AI Technical Summary

Problems solved by technology

[0010] Due to the existence of the above defects of APC control, when the APC control block has a large control dead zone parameter setting, the coiler does not recognize the positioning fault of the auxiliary coiling roller, causing the strip to ignite and leak oil, causing a fire

The positioning deviation between DS and OS is large, which also leads to deviations in the introduction of these equipment when the strip enters the side guide plate, pinch roller, and coiling roll, which in turn affects the coiling shape of the strip head

Similarly, it also brings the risk of stacking steel

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