Direct synthesis Method – Based Controller Design for Cold Rolling Mill

Abstract

The mathematical model (Interval Plant) of the web guide in cold rolling mill(CRM) is controlled using PID controller [1]. The given interval plant of the CRM is approximated to FOPTD +Integrator system using Sundaresan& Krishnamoorthy method.[2] The controllers are tuned using direct synthesis method proposed by Seshagirirao et. al. Rao [5], Ziegler – Nichols technique(Z-N), internal model control(IMC) and the performances are compared by simulation. Using direct synthesis method, a PID controller in series with lead/lag compensator is designed for control of integrating plus first-order time delay( IFOPTD) process. Guidelines are provided for selection of the desired closed loop tuning parameter. The method gives significant load rejection performances. The direct synthesis method gives simple equations for the controller settings. The performance of the closed loop system is evaluated for both original and approximated modelThe abstract is to be in fully-justified italicized text as it is here, below the author information. Use the word “Abstract” as the title, in 12-point Times New Roman, boldface type, centered relative to the column, initially capitalized. The abstract is to be in 11-point, single-spaced type, and may be up to 3 in. (18 picas or 7.62 cm) long. Leave two blank lines after the abstract, then begin the main text. All manuscripts must be in English.