%0 Journal Article %T Developments in PID Controllers: Literature Survey %A H. B. Patel %A Mrs. S. N. Chaphekar %J International Journal of Engineering Innovations and Research %D 2012 %I IJEIR %X Most of the process plants controlled by PID controllers have similar dynamics. It has found possible to set satisfactory controlled parameters from less plant information than a complete mathematical model. PID control has been an active research topic for many years. In this paper literature review of several useful PID type controller design techniques have been presented. It is observed that, performance using model order reduction technique is effective. %K PID CONTROLLER %K TUNING %K frequency response %K Model reduction %K stable %K time delay %U http://journals.indexcopernicus.com/fulltxt.php?ICID=1050179