Qualitative Reasoning in Electronic Fault Diagnosis

Case Based Reasoning as an Extension of Fault Dictionary Methods for Linear Electronic Analog Circuits Diagnosis

Even though there are plenty of methods proposed for diagnosing analog electronic circuits, the most popular are the fault dictionary techniques. The proposal of this paper is to extend the fault dictionary towards a Case Based Reasoning system. The case base memory, and the retrieval, reuse, revise and retain tasks are described. Special attention to the learning process is taken. An applicati...

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...

A Fault Diagnosis Tool for Hvac Systems Using Qualitative Reasoning Algorithm

Combining Interval and Qualitative Reasoning for Fault Diagnosis

A methodology is proposed to diagnose faults from a detection system that allows to express uncertainty with intervals in parameters and measurements. A fault is detected by comparing current measurements with computed external and internal approximations of behavior. The results are applied to diagnose faults. A qualitative data set is obtained in order to create fault rules. A fault library i...

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...