| This thesis develops the concept of qualitative model-based fault diagnosis technique and applies it to extrusion blow molding. The extrusion blow molding process is reviewed along with theories of qualitative reasoning, from which process-based qualitative models are developed. Based on the models, a fault diagnosis system is developed consisting of two parts: a fault reasoning system based on a simulation of the EBM process and a process monitor to measure process variables and to adapt the diagnosis to changing environments. |
