The Operational Schedule for Continuous Annealing.docVIP

The Operational Schedule for Continuous Annealing Proc#sing Bas#donImprov#dPSO Tang Zhenhao1, Tang Lixin2 (1. Key Laboratory of Integrated Automation of Process Industry，Ministry of Education，Northeastern University，China；2. Liaoning Key Laboratory of Manufacturing System and Logistics， The Logistics Institute，Northeastern University，China) Abstract! Continuous annealing technology is developed in recent years as one of the advanced strip processing technologies. The continuous annealing technology is composed of strip cleaning，annealing and pinch rolling，and so on. It has higher production efficiency than other annealing methods. This paper focuses on the operational schedule for the heating furnace of continuous annealing processing. Firstly, the mechanism model describes dynamic relationship between the strip temperature and the variables that include the fuel flow rate and the strip width and thickness and the strip speed. The model is easy to use in modern control system. Based on the model of strip temperature the optimization model is constructed. It aims at both the minimum of the error between strip temperature and the ideal value and the minimum of the fuel consumption. In the same time the optimization model subjects to variables bounds and the values of the strip width and thickness and the line speed and other conditions. Then the standard PSO algorithm and improved PSO are introduced in the paper. The model is solved by improved PSO algorithm. The results of the experiment show that the improved PSO is effective and accurate. It can create more economic benefit and social benefit for the enterprise，and it is helpful to realize the targets of carbon dioxide emissions reduction of our country. Keywords: continuous annealing furnace ； modeling and optimization ； PSO Introduction 　　This paper is motivated by the practical production scheduling problems for continuous annealing processing. Continuous annealing process produces steel strips of high tensile s