Design of a Robust H2 State Feedback Temperature Controller for a Steel Slab Reheating Furnace

José Salcedo-Hernández,Raul Rivas-Perez,Javier Sotomayor-Moriano

doi:10.3390/app10051731

Abstract

This article addresses the design of a robust H2 state feedback controller (H2-SFC) for the effective temperature control in the heating zone of the steel slab reheating furnace. Based on the available field data and system identification procedures, a mathematical model of the heating zone is derived, which presents autoregressive-moving average with exogenous input (ARMAX) structure and fourth order. The design of an H2-SFC controller for the effective control of the heating zone temperature of the slab reheating furnace under study is developed. The simulation results of the designed control system showed its high effectiveness compared to the conventional PID control.

Highlights

The steel industry is an industry with a lot of development potential due the fact that its products have multiple uses
This paper presents the following contributions: (1) A mathematical model that characterized the dynamic behavior of the heating zone of a steel slab reheating furnace based on the available field data and system identification procedures is obtained
Based on the application of system identification procedure, a mathematical model that describes the dynamic behavior of the heating zone temperature in a slab reheating furnace was obtained

Summary

Introduction

The steel industry is an industry with a lot of development potential due the fact that its products have multiple uses. Peru has a lot of potential in relation to the manufacture of steel, because this country has natural reserves of coal, coke, and limestone (CO3Ca), which are used to make steel [2]. The most modern steel factories have slab reheating furnaces composed of three zones: The reheating zone, the heating zone, and the soaking zone, that are separated with partial walls, which effectively block radiation transfer and hinder convective transfer [1]. These zones have the function of heating the slabs in the furnace to a desired temperature ranging from 1000 to 1250 ◦ C

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