SDG Modeling Approach for Chemical Engineering Process

Abstract

SDG is an important technology of building qualitative model, especially for hazard evaluation and fault diagnosis. Two modeling approaches based on mathematics model and flow chart are introduced. Besides, a modeling approach based on experience is put forward. Hazard evaluation emphasizes on completeness of revealing latent fault. Fault diagnosis requires high diagnosis speed and fault resolution. Therefore, experience based modeling approach is divided into modeling approach of hazard evaluation model and modeling approach of fault diagnosis model. Hazard evaluation model built by this approach can not only reflect faults completely, but also reveal the rules of fault propagation. Fault diagnosis model built by this approach is simple and has high fault resolution.