Combining Interval and Qualitative Reasoning for Fault Diagnosis

Soft Computing Approaches to Fault Diagnosis for Dynamic Systems

Recent approaches to fault detection and isolation for dynamic systems using methods of integrating quantitative and qualitative model information, based upon soft computing (SC) methods are surveyed. In this study, the use of SC methods is considered an important extension to the quantitative model-based approach for residual generation in FDI. When quantitative models are not readily availabl...

A proposal for the diagnosis of uncertain dynamic systems based on interval models

The performance of a model-based diagnosis system could be affected by several uncertainty sources, such as, model errors, uncertainty in measurements, and disturbances. This uncertainty can be handled by mean of interval models. The aim of this thesis is to propose a methodology for fault detection, isolation and identification based on interval models. Especially a modal interval based techni...

A Fault Diagnosis Tool for Hvac Systems Using Qualitative Reasoning Algorithm

Hybrid-Knowledge-Models-Based Intelligent Fault Diagnosis Strategies for Liquid-propellant Rocket Engines

This paper focuses on a qualitative fault diagnosis method based on the integration and fusion of shallow and deep knowledge for liquid-propellant rocket engines (LRE). The paper firstly clarifies the concept and the types of LRE diagnosis knowledge. Later, from the isomorphic transform point of view, the paper analyses the correlation of different knowledge and knowledge representation, and fo...

A Hybrid Approach to Fault Diagnosis in Network and System Management

In this paper, several Artificial Intelligence (AI) techniques such as Rule-Based Reasoning (RBR), Bayesian Networks (BNs), Neural Networks (NNs), Case-Based Reasoning (CBR), Qualitative Reasoning (QR), and Model-Based Reasoning (MBR) are described. Then an automated management system prototype is presented. Finally, a hybrid approach to automated network and system management is proposed. Howe...