Research And Application Of Level 2 Control System In Cold Tandem Rolling

Cold tandem rolling has the characteristics of multi-variable, nonlinear, high-speed, continuous, and with the development of rolling technology and diversification and complication of products, which makes the control process of cold rolling more and more complicated.People gradually realize that the rely mainly on experience mode of production has been difficult to meet the requirements of modern cold rolling production for accuracy and efficiency. By taking a six stand cold tandem rolling as the research object,design the Level 2 control systemFirst, based on the knowledge of the computer control system and its control functions, design the main functions and the work flow for the Level 2 control system,and analyzes the functional requirements of the Level 2 control system software.Then, according to the functional requirements and combined with the previous engineering experience,This thesis focus on the reasearch of rolling parameter model calculation function, established the main related mathematical one by one and design a variety of rolling strategy, which basically meet the actual rolling rules and laid a theoretical basis for the follow-up of software development。At the same time,use the Newton-Raphson method for solving the non-linear equations to meet the needs of the simplified computer online control.Finally, considering the influence of rolling conditions changes on model precision. Reasearch the model self-learning of deformation resistance and friction by using linear regression and exponential smoothing method, thereby indirectly improve the setting accuracy of rolling force model.On the basis of the studies and researches above,develop the HMI and function implementation of the Level 2 software.After actual application show that the Level 2 control system achieved excellente effect.