Control system and method for accelerating cooling process

Abstract

The control on the speeded cooling of steel plate is related to the profile and performance of the steel plate product. The present invention provides control system and method on accelerated cooling process. The control system includes one data acquiring device, one data pre-calculating module, one on-line calculation module and one post calculation module. The control method includes the decoupling presetting of controlling quantities, the on-line dynamic regulation on the set cooling values by means of considering the disturbance factors of the steel plate in the cooling system inlet and determining the real-time controlling quantities of different cooling sections accurately. The present invention is suitable for application in different thick plate cooling lines, and can reach the aim of reducing cost and raising economic benefit.

Description

technical field [0001] The invention belongs to the field of production and control of the online accelerated cooling process of rolled metal plates in metallurgy, and in particular relates to a control system and control method for the accelerated cooling process. Background technique [0002] The online accelerated cooling process of high-temperature metal sheets after rolling has been widely used in the production process of high-strength, high-toughness, and good weldability thick plates. The controlled cooling of the metal plate greatly reduces the investment of the alloy and saves the post-processing process through the control of the structure of the steel plate, thereby achieving the purpose of saving costs and improving benefits. [0003] From the point of view of the structural transformation products of steel, the accelerated cooling of slabs in the past was only to obtain a single pearlite structure with finer grains. Now some steel types hope to obtain ferrite a...

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Problems solved by technology

[0005] The existing accelerated control cooling schemes generally have the following defects. They all solve the control scheme of a single control cooling section. The cooling control of the material; both have the problem that the structure division of the pre-calculation model is not clear, and the control quantity solution and the physical quantity solution model are coupled to each other, which is not conducive to the optimization of the two models’ respective unique algorithms, and is also not conducive to the self-adaptation and optimization of the model. Self-learning, resulting in relatively large system errors that cannot be eliminated in the pre-calculation process; both use a single closed-loop short-time adaptive algorithm, that is, calculate the online model calculation deviation according to the current cooling condition of the steel plate, and obtain the self-adaptive algorithm by using the short-time adaptive algorithm. Adaptation coefficient set, the adaptive coefficient set will act on the online calculation model in the next control cooling process, and eliminate the calculation deviation of the model to a certain extent

The biggest problem with this method is that it does not correctly distinguish the source of the introduced error, and only using short-term self-adaptation may cause serious deviation or fluctuation of the self-adaptive coefficient, which cannot eliminate calculation errors well

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