Characteristic parameter identification method of lateral distribution of strip steel thickness on the basis of mechanism

Abstract

The invention discloses a characteristic parameter identification method of the lateral distribution of strip steel thickness on the basis of a mechanism, and relates to the field of strip steel quality control. In the method, one function is adopted to describe the lateral distribution of the strip steel thickness in the whole width direction of the strip steel, the function consists of a basic mode based on an elastic flattening mechanism and a common polynomial, so that the function has few parameters and high precision, and strip steel edge drop can be favorably fitted. The characteristic parameter identification method has an important meaning on the aspects of identifying the section shape of strip materials, lowering influence on the plate shape of a finished product by the shape fluctuation of a material feeding section and improving the quality of the strip steel.

Description

technical field [0001] The invention relates to a method for identifying characteristic parameters of the lateral distribution of strip steel thickness, in particular to a mechanism-based identification method for characteristic parameters of the lateral distribution of strip steel thickness, and belongs to the technical field of controlling the quality of strip steel by means of computers. Background technique [0002] Steel rolling production is the post process of steel production, and strip rolling is a part of steel rolling production. With the development of industries such as automobile manufacturing, higher requirements are put forward for the dimensional accuracy and shape of strip steel. [0003] In the strip rolling production process, there will be local thinning phenomenon at the edge. There are many reasons for this phenomenon, including: in the width direction of the strip, the rolling pressure is unevenly distributed, and the rolling force at the edge will be...

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Problems solved by technology

They are respectively: "Three-dimensional Rolling Theory and Its Application—Strip Element Method for Simulating the Rolling Process", written by Liu Hongmin, Science Press, 1999. Sub-polynomial fitting, this method cannot describe the edge thinning phenomenon of strip steel; a strip steel section shape detection and identification method (patent publication number is CN101908248A), this patent divides the detector into three groups, and the corresponding strip steel width is three Three high-order polynomial functions were fitted to the intervals, and the characteristic parameters of the strip thickness lateral distribution were obtained by fitting the method with the smallest deviation square sum function value, which achieved good results. However, the polynomial degree involved in this method is relatively high. (Ninth degree polynomial), contains more characteristic parameters (15)

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