Fault Diagnosis under Multiple Sequential Faults of the Rain-gauge Network Used to Control the Barcelona Sewer System

This paper discusses the problem of fault diagnosis under multiple sequential faults occurrence. In industrial applications this type of fault is the most common since the continuous operation of systems/processes is required. The fault diagnosis algorithms should cope with such type of multiple faults, but degradation in their fault isolation capabilities is introduced until the point that they should be stopped. A new algorithm to design the fault diagnosis system to be able to tolerate multiple sequential sensor faults is proposed. Finally, an example based on the raingauge sensor network of the Barcelona sewer system will be used to illustrate how the associated fault diagnosis system behaves under multiple sequential faults occurrence and to test the proposed algorithm. Copyright © 2005 IFAC.