Dual Rack Steckel Hot Rolling Mill Control System Off-line Simulation Study

Steel is very important industry in world economy, the progress of steel influences state economy directly, so steel is an important portion of Chinese traditional industry. HotRolling strip is an important and indispensable steel product in steel, it is used in various fields, such as chemical industry, bridge and engineer machine and so on, therefore, HotRolling strip is a kind of pivotal product in the development of national economy.Two-Stand Hot Reversing Mill is a new type strip mill, it had been improved and invented based on Single-Stand Hot Reversing Mill, and it has both characteristics of Single-Stand Hot Reversing Mill and Hot Tandem Mill. Two-Stand Hot Reversing Mill is a reversing mill, two stand roll can realize roughing phase and finishing phase, large-scale rolling force, good shape. By testing rolling process and control system of Two-Stand Hot Reversing Mill, it is an advanced mill.Two-Stand Hot Reversing Mill is very complex as a auto control object, and rolling process is automatic procedure, the architecture of control system base on hierarchical control structure. In point of hierarchical control structure, control system of Two-Stand Hot Reversing Mill has three layer: Level-0 is composed of sensor and control device, they has been formed control network; Level-1 is composed of Mill APC and Laminar/Coiler APC; Level-2 is composed of ALPHA Computers which be used in model calculating. Furthermore, control system of Two-Stand Hot Reversing Mill is classical mix system, there are four different computer system in control LAN: APC system; MMI system; Net Server based on Windows 2000 Server; ALPHA computer.There are two kind of subsystem which can simulate Level-2 of Two-Stand Hot Reversing Mill: On-line Simulation Subsystem and Off-line Simulation Subsystem, the difference between them is various source of data and discrepant function of model modification. We focus on study of Off-line Simulation with control system in this paper, simulating the real rolling control is the task of Off-line Simulation, then, according to the result of simulating calculation, we can examine the veracity of control parameters, input data and environmental variable, at the same time, we can analyze the precision and adaptive of control models, too. These can help engineers finding or predicting the trouble of control system. Another, Off-line Simulation is supplement of self_learning and adaptive in control system, it is propitious to optimization of control system.My research bases on implement of the project "Optimization of Two-Stand Hot Reversing Mill Control System", in this paper, I study the structure and implement of control system deeply, design and build the Off-line Simulation LAN, three test method in Off-line Simulation LAN are presented.