HYDRAULIC BEND CONTROL SYSTEM RESEARCH OFFUZZY SELF-ADAPTIVE PID BASED ON VIRTUALINSTRUMENT

摘要

Hydraulic bend control system, a kind of non-linear, closecoupling complex electromechanical system, is an importantingredient of rolling shape control. Conventional PID processcontrol is not good enough to meet the increasing precise,intelligent requests of complex electromechanical system.The combination of Intelligent and conventional controlmethods can solve this problem effectively. Applying virtualinstrument to hydraulic bend control system of cold mill, thispaper designs conventional PID and fuzzy self-adaptive PIDcontroller, presents the solution of integral saturation problemon conventional PID, uses the fuzzy control rules to on-lineadjust the parameters and realizes the optimal parametermodification. Through the practical test comparison of twocontrol methods, it shows fuzzy self-adaptive PID controlgreatly improves the response speed and control precision ofhydraulic bend control system..