Control method for quickly and accurately positioning steel coil dolly

Abstract

The invention discloses a control method for quickly and accurately positioning a steel coil dolly. The method comprises the following steps of: computing position setting values of a moving direction and a lifting direction of the steel coil dolly according to known equipment parameters and relevant parameters detected by a position sensor, designing a running speed slope curve of the steel coil dolly according to the position setting values and the production actual requirement, defining the proportional relation between the position and the speed, building a position closed-loop control system, eliminating the influence of the inertia of the steel coil dolly on the positioning precision by an inertia compensation method, guaranteeing the rapidity of a positioning process by a method for setting minimum speed, and finally carrying out PLC (programmable logic controller) programming design. The control method is high in control precision, quick in positioning process, smooth in speed change, and convenient for engineering application and equipment maintenance.

Description

technical field [0001] The invention belongs to the technical field of iron and steel production equipment, and relates to a control method for fast and precise positioning of a steel coil trolley applied to a cold rolling production line and a subsequent processing line. Background technique [0002] During the cold rolling production process, frequent coiling operations are required. In this process, the steel coil needs to be accurately loaded onto the uncoiling cone head. Therefore, it is necessary to perform fast and accurate positioning control on the moving and lifting movements of the steel coil trolley. The coil take-up process of the steel coil trolley has realized automatic positioning, see the Chinese patent "Automatic coil support positioning device and method" (patent application number: 200610027432.7); Volume) has not yet fully realized automatic positioning, and some key actions and steps still need manual judgment and intervention, see "Scroll Car Control S...

AI Technical Summary

Problems solved by technology

The coil take-up process of the steel coil trolley has realized automatic positioning, see the Chinese patent "Automatic coil support positioning device and method" (patent application number: 200610027432.7); Volume) has not yet fully realized automatic positioning, and some key actions and steps still require manual judgment and intervention, see "Scroll Car Control System" ("Metallurgical Automation" Supplement in 2006)

In addition, the steel coil trolley movement control system in the prior art does not take into account the influence of the inertia of the steel coil trolley on the positioning accuracy

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