Using the Unfalsified Control Concept to achieve Fault Tolerance

ARI INGIMUNDARSON; RICARDO S. SÁNCHEZ PEÑA

Seúl, Korea

Congreso; IFAC 17th World Congress; 2008

The International Federation of Automatic Control

The paper investigates the use of the unfalsified control concept in the area of fault tolerant control. No fault diagnosis system is required but rather by a simultaneous on-line performance assessment of multiple controllers in a bank of controllers, the best one for the plant at each time can be selected. A controller does not need to form part of the feedback loop for its performance to be assessed. Strategies to construct the bank of controllers are discussed and a switching strategy for fault tolerant control is presented. No previous models of system or faults are necessary, only real-time input/output data streams. Finally the investigated methodology is put to the test by applying it to a non-linear model of the breathing system of a PEM fuel cell.