AQUANET - Decentralised and Reconfigurable Control for Water delivery Multipurpose Canal Systems

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Fault detection agents based on wavelet adaptive thresholds

Publication . Mendes, Mário J. G. C.; Costa, José Sá da

Designing a Fault Tolerant Networked Control System (FTNCS) to deal with large-scale complex networked control systems is a very diﬃcult task due to the large number of sensors and actuators spatially distributed and networked connected. To deal with this problem, this paper presents a new agent based fault detection (FD) system for complex and dynamic processes, where the modularity and complexity of the processes are important aspects in the FD agent system constructed. The FD agents proposed here have hybrid architectures based in a horizontal layers, where the reactive layer is based on Wavelet Adaptive Thresholds. The results, using a distributed benchmark with a three tank process, show that the FD agents proposed are a good alternative to classic FD methods.

2010-09Conference object

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A multi-agent approach to a networked fault detection system

Publication . Mendes, Mário J. G. C.; Costa, José Sá da

Nowadays, fault diagnosis systems design should have into account the distribution and complexity of the process and must be able to cooperate and communicate with other systems to achieve satisfactory performance. To this end a new agent based fault detection system for networked control process is proposed in this paper. A hybrid architecture based on horizontal layers as fault detection (FD) agents architecture is adopted. The reactive layer of the FD agents is based on neural networks models for residuals generation with adaptive threshold. The deliberative layers take into account the agent knowledge and goals, and also the process distribution and network. The new agent based FD system has been applied and tested with good results in a three tank process using a star Ethernet network topology.

2010-10Conference object

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