PERFORMANCE COMPARISON BETWEEN SINGLE LOOP CONTROL AND CASCADE CONTROL OF SUPERHEATED STEAM TEMPERATURE SYSTEM USING ANALOG CONTROLLERS

摘要

This paper explains the method of obtaining the best mode of control out of single loop control and cascade control of a superheated steam temperature system using analog controllers, based on the least value of integral time weighted absolute error. The superheated steam temperature system is of fifth order model. This higher order model is converted into delay plus first order model by minimum area method, since all tuning methods of analog controllers are designed for delay plus first order model. Single loop control (PI), and cascade control (P, PI) are designed for superheated steam temperature system by applying different tuning methods. Simulations are performed by using fifth order mathematical model of a superheated steam temperature system. The least value of integral time weighted absolute error decides the best mode of control.