Implementation, and Analysis DEVELOPMENT OF A FIXEB-GPC CONTROLLER FOR A FOOD EXTRUDER BASED ON PRODUCT QUALITY ATTRIBUTES: Part II: Control Development

Institution of Chemical Engineers 2005 - all rights reserved Model predictive controllers based on X and ARX integrated model forms were developed using generalized predictive control (GPC) guidelines. Product quality attributes (PQA) control systems were developed. The CB-ARX model based controller was extended to include SPC control strategy. Models and controllers were validated and controllers were implemented on-line to compare performance. Tracking performance was compared using step changes in setpoints. The reaction to typical uncontrolled disturbances was also evaluated by using corn meal of different granulation and moisture content, and simulating screw wear via die resistance change. The X-based controller did not react as strongly to output disturbances as the ARX-based controllers. SPC-GPC strategy provided the smoothest responses for both tacking and disturbance rejection. The MISO controller performed as well as the MIMO controller. MIB based control provided a more uniform process. All controllers reduced the PQA variation compared to no control.

DEVELOPMENT OF A FIXEB-GPC CONTROLLER FOR A FOOD EXTRUDER BASED ON PRODUCT QUALITY ATTRIBUTES: Part II: Control Development, Implementation, and Analysis Academic Article