SURVEY OF ROBUST RESIDUAL GENERATION AND EVALUATION METHODS IN OBSERVER-BASED FAULT-DETECTION SYSTEMS

The paper outlines recent advances of the theory of observer-based fau lt diagnosis in dynamic systems towards the design of robust technique s of residual generation and residual evaluation. Emphasis will be pla ced upon the latest contributions using frequency domain techniques in cluding H-infinity, theory, nonlinear unknown input observer theory, a daptive observer theory, artificial intelligence including fuzzy logic , knowledge-based techniques and the natural intelligence of the human operator. Two representative examples illustrate the efficiency of th e observer-based approach. (C) 1997 Elsevier Science Ltd.