冷轧立式活套张力建模与控制研究

东北大学专业学位论文AbstractResearch on modeling and control system forvertical looper of strip cold tandem millAbstractLooper is the key equipment in modem PL-TCM CAL CGL production Line As the storesystem of the line,Looper used to keep the line continue running during the time welding cutting andSPM roll changing,As the tension section infect the neighbor section tension control and thefunction of the CPC system.The control system of the Looper is the most complicate in the wholeline.The thesis's background is the Putian continuous galvanizing line,and the subject investigatedis the exit loopers.Firstly,the thesis analysis the relationship between the position control,speedcontrol and tension control of the loopers.Then according to the their relation and locale situation,itanalysis the method of complex tension control the exit vertical loopers used,and finds the problemsof the present looper system in Sync-control.Secondly,the thesis uses the method of BP neuralnetwork to establish the model of speed and tension of loopers system,and validates that the modelaccords with the locale situation generally.The conventional PID controller satisfies with thetechnological requirements,but for the time-change and non-linear model as vertical loopers,it hasdifficulties in filling the purposes of high precision control and robustness.Finally,the thesis usessingle neure self-regulating PID controller to perform an experiment in tracking and robustness.The thesis uses S-function and Simulink in MATLAB to make an experiment with simulation.According to the analysis and comparison between conventional PID and single neuralself-regulating PID controller,the thesis comes to a conclusion that the system which single neuralself-regulating PID controller has the characteristic of responding quirkier,better steady stateperformance and smaller overshoot,besides,it has the capability of suiting with the parameters'changes,which has improve the control precision of the looper system.increase its rapidity andstability It has important actual and academic value in improving the level of looper control andsteel quality.keywords:Vertical looper;Tension control;BP neural network;single neure self-regulatingPIDcontrol-Ⅱ