Research On Virtual Experimental Platform For Hydraulic Servo System In Cold Rolling Temper Mill

Thin strips in cold rolling are deep processing products agglomerated with high and new technology in iron and steel industry. Its quality will impact Chinese economic development directly. As the final working procedure to assure the qualities of products, temper rolling plays a crucial role in controlling shape and surface state of strip. As the most important device in the course of temper rolling, dynamic and static characteristic of hydraulic servo system will have impacts on stability, response and precision directly. However, using actual experiments to obtain system performance needs enormous cost, and carrying on experiments on the high speed production line such as CAPL(Continous Annealing and Processing line) is forbidden. Consequently, it is necessary to replace experiments partly with digital virtual prototype.The paper conducting a research on virtual experimental platform for hydraulic servo system of cold rolling temper mill, which is a branch task of the project named technical study on hydraulic servo system of 2030 cold rolling temper mill in Baosteel. The normal operational parameters and optimization debug method for controlling parameters are fixed by quantitative analysis on models of hydraulic servo system presenting system performance. Therefore the safe reliability of adjusting parameters is improved during test-drive. Meanwhile, a platform on fault prefiguring has been built for the servo system. Firstly, the study ascertained actuators and load structures of hydraulic system. Secondly, the paper ascertained control algorithm in hydraulic servo system by conducting a research on control strategy on strip shape of temper mill. Thirdly, parametrizing models of the whole hydraulic servo system are set up by using AMEsim, and then validated authenticity of emulation models by contrasting with actual measurements. Finally, the paper utilizes parametrizing models to develop virtual experimental research on control method for variable gain and function of fault-prefiguring in push-up hydraulic servo system of cold rolling temper mill.Test results show that the virtual experimental platform provided here for adjusting control parameters and fault prefigure is reliable, for the consistency of simulation data and actual measurements. The dynamic process and simulation results are practical, which provides the underlying basis for developing whole-machine virtual experiment on control system in temper mill.