Extruder Robust Temperature Control System for Multi Loop Control

Abstract

Robust control strategies of an extruder temperature control system are considered for a multi loop control. For an extrusion process, if production issues such as system changes, set-point changes and the input limits of the band-heater and fan are considered, the quality of product depends much on the dynamics of the plant within the operating range. The system must also satisfy the mechanical conditions. A computer simulation and experiment have shown that multivariable dynamics consideration can be successfully applied to the extruder despite uncertainty in the time delays, time constant, and gains under the extrusion issue.